---
title: "Configuring Delegated, Forward, and Stub Zones"
canonical: "https://docs.infoblox.com/space/nios85/35816086/Configuring%20Delegated%2C%20Forward%2C%20and%20Stub%20Zones"
format: markdown
---
In addition to authoritative zones, the NIOS appliance allows you to configure delegated, forward, and stub zones. A delegated zone is a zone managed by (delegated to) another name server who owns the authority for the zone. A forward zone is where queries are sent before being forwarded to other remote name servers. A stub zone contains records that identify the authoritative name servers in another zone. This section covers the following topics:

- [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Configuring](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[a](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Delegation](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)
- [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Configuring](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[a](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Forward](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Zone](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)
- [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Configuring](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Stub](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Zones](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)

# > Macro (anchor)

 > Macro (anchor)

 > Macro (anchor)

 Configuring a Delegation

Instead of a local name server, re> Macro (anchor)

mote name servers (which the local server knows) maintain delegated zone data. When the local name server receives a query for a delegated zone, it either responds with the NS record for the delegated zone server (if recursion is disabled on the local server) or it queries the delegated zone server on behalf of the resolver (if recursion is enabled).  
  
For example, there is a remote office with its own name servers, and you want it to manage its own local data. On the name server at the main corporate office, define the remote office zone as delegated, and then specify the remote office name servers as authorities for the zone.  
  
You can delegate a zone to one or more remote name servers, which are typically the authoritative primary and secondary servers for the zone. If recursion is enabled on the local name server, it queries multiple delegated name servers based on their round-trip times. You can also add arpa as a top-level forward-mapping zone and delegate its subzones.  
  
You can also configure TTL settings of auto-generated NS records and glue A and AAAA records for delegated zones in forward-mapping, IPv4 reverse-mapping, and IPv6 reverse-mapping zones. For information, see *<span style="color: #0000ff">[Specifying Time](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)</span>*<span style="color: #0000ff">[To](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)</span>*<span style="color: #0000ff">[Live](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454) [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)</span>*<span style="color: #0000ff">[Settings](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35449454)</span>*.  
  
The delegation must exist within an authoritative zone with a Grid primary server.

# Configuring a Delegation for a Forward-Mapping Zone

To create a delegation for a forward-mapping zone:

1. From the **Data**** Management** tab, select the **DNS** tab -> **Zones** tab.
2. Click the parent zone to open it.  
Grid Manager displays the **Records** and **Subzones** tabs of the zone.
3. From the **Subzones** tab, click the Add icon -> **Zone** -> **Add**** Delegation**.
4. In the *Add **Delegation* wizard, specify the following:
  - **Name:** This field displays a dot followed by the domain name of the current zone. Enter one or more labels before the dot to specify the domain name of the subzone.
  - **DNS**** View:** This field displays only when there is more than one DNS view in the network view. Displays the DNS view of the current zone.
  - **Comment:** Optionally, enter additional text about the zone.
  - Disable: Click this checkbox to temporarily disable this zone. For information, see <span style="color: #0000ff">[*Enabling and Disabling Zones*](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-EnablingandDisablingZones)</span>. Note that disabling a zone may take a longer time to complete depending on the size of the data.
  - **Lock**: Click this checkbox to lock the zone so that you can make changes to it, and also prevent others from making conflicting changes. For information, see  <span style="color: #0000ff"> </span>*<span style="color: #0000ff">[Locking](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)</span>*<span style="color: #0000ff">[and](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)</span>*<span style="color: #0000ff">[Unlocking](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)</span>*<span style="color: #0000ff">[Zones](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35849873/Locking+Unlocking+Enabling+Disabling+Zones#Locking,Unlocking,Enabling,DisablingZones-LockingandUnlockingZones)</span>*.
5. Click **Next** to assign a delegation name server group or define the name servers for the zone. Select one of the following:
  - **Use**** this**** name****server**** group**: Select this to assign a delegation NS group for the delegated zone. You can select the delegation NS group from the drop-down list.
  - **Use**** this ****set**** of**** name****servers**: Select this to define name servers for the delegated zone. In the *Name **Servers* panel, click the Add icon and specify the following information**:**
    - **Name:** Enter the name of a remote name server to which you want the local server to redirect queries for zone data. This is a name server that is authoritative for the delegated zone.
    - **Address:** Enter the IP address of the delegated server.
  For information about delegation NS group, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>*<span style="color: #0000ff">[Delegation](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>*<span style="color: #0000ff">[Name](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>*<span style="color: #0000ff">[Groups](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1831)</span>*.
6. Save the configuration and click **Restart** if it appears at the top of the screen, or click **Next** to define extensible attributes as described in [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Extensible](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Attributes](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*[.](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)  
or  
Click the Schedule icon at the top of the wizard to schedule this task. In the *Schedule** Change* panel, enter a date, time, and time zone. For information, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[Scheduling](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[Tasks](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*.


> ⚠️ **Note**
> ⚠️ 
> ⚠️ <span style="color: #333333">The DNS server resolves the FQDN of the delegated name server and does not use the IP address that you specify when assigning the delegated name servers. </span>

# Configuring a Delegation for a Reverse-Mapping Zone

To create a delegation for a reverse-mapping zone:

> Macro (legacy-content)

> ⚠️ **Note**
> ⚠️ 
> ⚠️ <span style="color: #333333">The DNS server resolves the FQDN of the delegated name server and does not use the IP address that you specify when assigning the delegated name servers. </span>

# > Macro (anchor)

 > Macro (anchor)

Configuring a Forward Zone

When you want to forward queries for data in a particular zone, define the zone as a forward zone and specify one or more name servers that can resolve queries for the zone. You can also assign one or more external name servers as default forwarders for a forward zone. For example, define a forward zone so that the NIOS appliance forwards queries about a partner's internal site to a name server, which the partner hosts, configured just for other partners to access.  
  
You can override the default forwarders for a forward-mapping zone at a Grid member level and configure custom forwarders. In other words, each Grid member can have its own forwarders for the forward zone. For example: a forward-mapping zone foo.com served by two Grid members M1 and M2 with M1 forwarding queries to 10.1.0.1 and 10.1.0.2 and M2 forwarding queries to 90.3.3.3 and 90.4.4.1. Note that the Grid member uses the default forwarders unless you override them at any level. For more information about domains and zones, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>*<span style="color: #0000ff">[Configuring](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>*<span style="color: #0000ff">[Authoritative](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>*<span style="color: #0000ff">[Zone](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>*<span style="color: #0000ff">[Properties](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482407)</span>*.

> ⚠️ **Note**  
> ⚠️ The use of a forward zone is different from that of a forwarder. (A forwarder is a name server that performs recursive lookups on behalf of the name servers that forward queries to it. For more information, see *<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35881759)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35881759)</span>*<span style="color: #0000ff">[Forwarders](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35881759)</span>*.) A NIOS appliance forwards queries to the name server of a forward zone because the name server can resolve queries for the zone. A NIOS appliance forwards queries to a forwarder regardless of zones.

The NIOS appliance automatically generates a name server record in the parent authoritative zone when a subdomain associated with the parent is conditionally forwarded. For example, consider that you configure the following within a single DNS view:

- An authoritative zone *parent.tld* where Grid member is the default primary.
- A subdomain *subdomain.parent.tld*, which is a conditional forwarding zone, and forwards queries to the *ns1.abczone.tld* zone with the IP address *1.2.3.4*.

NIOS automatically creates an *RDATA ns1.abczone.tld* name server record for *subdomain.parent.tld* in the *parent.tld* authoritative zone. You can however disable the generation of name server records and the NIOS appliance deletes all the existing name server records from the parent zone.

Note that a name server can have only one definition for a zone in any given DNS view; a forward zone cannot be configured on a member that already has a zone with the same domain name configured on it in the same DNS view. To configure a forward-mapping zone:

> Macro (legacy-content)

To configure a forward IPv4 reverse-mapping zone:

> Macro (legacy-content)

To configure a forward IPv6 reverse-mapping zone:

> Macro (legacy-content)

# > Macro (anchor)

 > Macro (anchor)

 > Macro (anchor)

Configuring Stub Zones

A stub zone contains records tha> Macro (anchor)

t identify the authoritative name servers in the zone. It does not contain resource records for resolving IP addresses to hosts in the zone. Instead, it contains the following records:

- SOA (Start of Authority) record of the zone
- NS (name server) records at the apex of the stub zone
- A (Address) records that map the name servers to their IP addresses

Stub zones, like secondary zones, obtain their records from other name servers. Their records are read only; therefore, administrators do not manually add, remove, or modify the records.  
  
Stub zone records are also periodically refreshed, just like secondary zone records. However, secondary name servers contain a complete copy of the zone data on the primary server. Therefore, zone transfers from a primary server to a secondary server, or between secondary servers, can increase CPU usage and consume excessive bandwidth. A name server hosting a stub zone maintains a much smaller set of records; therefore, updates are less CPU intensive and consume less bandwidth.  
  
When a name server hosting a stub zone receives a query for a domain name that it determines is in the stub zone, the name server uses the records in the stub zone to locate the correct name server to query, eliminating the need to query the root server.  
  
[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Figure](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[19.8](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883) and [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Figure](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[19.9](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883) illustrate how the NIOS appliance resolves a query for a domain name for which it is not authoritative. [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Figure](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[19.8](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883) illustrates how the appliance resolves a query when it does not have a stub zone.  
  
[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Figure](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[19.9](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883) illustrates how the appliance resolves the query with a stub zone.  
  
In [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Figure](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[19.8](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*, a client sends a query for ftp.sales.corp200.com to the NIOS appliance. When the appliance receives the request from the client, it checks if it has the data to resolve the query. If the appliance does not have the data, it tries to locate the authoritative name server for the requested domain name. It sends nonrecursive queries to a root name server and to the closest known name servers until it learns the correct authoritative name server to query.  
> Macro (anchor)

 *Figure* *19.8* *Processing* *a* *Query* *without* *a* *Stub* *Zone*

> Macro (drawio)

  
In [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Figure](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[19.9](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*, when the NIOS appliance receives the request for the domain name in corp200.com, it determines it does not have the resource records to resolve the query. It does, however, have a list of the authoritative name servers in the stub zone, corp200.com. The appliance then sends a query directly to the name server in corp200.com.   
> Macro (anchor)

 *Figure* *19.9* *Processing* *a* *Query* *with* *a* *Stub* *Zone*

> Macro (drawio)

  
Stub zones facilitate name resolution and alleviate name server traffic in your network. For example, the client in the previous examples is in corpxyz.com. The corpxyz.com and corp200.com zones are partners, and send all their communications through a VPN tunnel, as shown in [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Figure](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[19.10](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*. The firewall protecting corpxyz.com is configured to send all messages for the 10.2.2.0/24 network through the VPN tunnel. Infoblox_A hosts the stub zone for corp200.com. Therefore, when the host in corpxyz.com sends a query for ftp.sales.corp200.com, Infoblox_A obtains the IP address of Infoblox_B (10.2.2.7) from its stub zone records and sends the query to the firewall protecting corpxyz.com.  
  
Because the destination of the query is in the 10.2.2.0/24 network, the firewall (configured to encrypt all traffic to the network) sends the request through a VPN tunnel to Infoblox_B. Infoblox_B resolves the query and sends back the response through the VPN tunnel. All name server traffic went through the VPN tunnel to the internal servers, bypassing the root servers and external name servers.   
  
> Macro (anchor)

 *Figure* *19.10* *Stub* *Zone* *Configuration* 

> Macro (drawio)

In parent-child zone configurations, using stub zones also eases the administration of name servers in both zones. For example, as shown in [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Figure](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[19.10](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*, sales.corp200.com is a child zone of corp200.com. On the corp200.com name servers, you can create either a delegated zone or a stub zone for sales.corp200.com.  
  
When you create a delegated zone, you must first specify the name servers in the delegated zone and manually maintain information about these name servers. For example, if the administrator in sales.corp200.com changes the IP address of a name server or adds a new name server, the sales.corpxyz.com administrator must inform the corp200.com administrator to make the corresponding changes in the delegated zone records.  
  
If, instead, you create a stub zone for sales.corp200.com, you set up the stub zone records once, and updates are then done automatically. The name servers in corp200.com that are hosting a stub zone for sales.corp200.com automatically obtain updates of the authoritative name servers in the child zone.  
  
In addition, a name server that hosts a stub zone can cache the responses it receives. Therefore, when it receives a request for the same resource record, it can respond without querying another name server.

## Creating Stub Zones

When you create a stub zone on the NIOS appliance, you specify the following:

- The Grid member that is hosting the stub zone.  
You can specify multiple appliances if you want the stub zones on multiple name servers. If you do, the appliances store identical records about the stub zone. You can also specify a stub member NS group for the zone. For information on specifying a stub member NS group, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Stub](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Member](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Name](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Groups](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*[.](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)
- The IP address of the primary server(s) that the NIOS appliance can query in the stub zone.

The primary server can be a Grid member or an external primary server. If you specify multiple primary servers, the appliance queries the primary servers, starting with the first server on the list. You can also specify a forward/stub server NS group for the zone. For information on specifying a forward/stub server NS group, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Forward/Stub](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Name](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Groups](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*.  
  
The primary server and the name server hosting the stub zone can belong to the same Grid, as long as the authoritative zone and the stub zone are in different DNS views. You cannot configure one zone as both authoritative and stub in the same view.  
  
After you create a stub zone, the NIOS appliance does the following:

1. It sends a query to the primary server for the SOA (Start of Authority) record of the stub zone. The primary server returns the SOA record.
2. Then, it sends a query for the NS (name server) records in the zone.  
The primary server returns the NS records and the A (address) records of the name servers. (These A records are also called glue records.)  
If the primary server is a NIOS appliance, you might have to manually create the A record and add it to the stub zone. A NIOS appliance that is the primary server for a zone always creates an NS record, but does not always create an A record.

- The appliance automatically creates an A record when its host name belongs to the name space of the zone. For example, if the zone is corpxyz.com and the primary server host name is server1.corpxyz.com, the appliance automatically creates the NS and A records and sends these records when it is queried by the stub zone name server.
- The appliance does not automatically create an A record when its host name is in a name space that is different from the zone. For example, if the zone is corp200.com and the primary server host name is server1.corpxyz.com, then the appliance creates the NS record only and sends it when it is queried by the stub zone name server. In this case, you must manually create the A record.

## Maintaining Stub Zones

The NIOS appliance maintains the stub zone records and updates them based on the values in the SOA record as follows:

- The refresh interval indicates when the appliance sends a discrete query to the primary name server for the stub zone. The appliance learns about any changes in the stub zone and updates the NS and A records in the stub zone accordingly.
- If the update fails, the retry interval indicates when the appliance resends a discrete query.
- If the query continues to fail, the expiry value indicates when the appliance stops using the zone data.

## Adding Stub Zones

To add a stub zone, you must identify the Infoblox appliance that hosts the stub zone, and provide the IP address of the primary server.  
  
You can also add stub zones for Microsoft servers that are managed by Grid members. For information, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>*<span style="color: #0000ff">[Managing](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711) [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>*<span style="color: #0000ff">[Microsoft](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>*<span style="color: #0000ff">[Windows](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>*<span style="color: #0000ff">[Servers](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35481711)</span>*.  
  
You can configure a stub zone for forward mapping or reverse mapping zones.  
  
To add a forward-mapping stub zone:

1. From the **Data** **Management** tab, select the **DNS** tab, expand the Toolbar and click **Add** -> **Zone** -> **Add** **Stub** **Zone**.
2. In the *Add* *Stub* *Zone* wizard, click **Add** **a** **stub** **forward-mapping** **zone** and click **Next**.
3. Specify the following, and then click **Next**:
  - **Name:** Enter the name for the stub zone.
  - **Comment:** Enter a useful comment, such as the admin to contact for the stub zone.
  - **Disable:** Click this checkbox to temporarily disable this zone. Note that disabling a zone may take a longer time to complete depending on the size of the data.
  - **Lock**: Click this checkbox to lock the zone so that you can make changes to it, and also prevent others from making conflicting changes.
4. Click **Next** to define primary servers in the stub zone. You can specify a forward/stub server NS group or define the servers individually. Select one of the following:
  - Select **Use** **this** **name** **server** **group** to assign a forward/stub server NS group for the stub zone. You can select the forward/stub server NS group from the drop-down list. For information about forward/stub server NS groups, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Forward/Stub](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Name](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Groups](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*.
  - Select **Use** **this** **set** **of** **name** **servers** to define primary servers for the stub zone. Click the Add icon and enter the **Name** and **IP** **Address** of the primary server in the stub zone.  
If the primary server is a Grid member, you must enter the host name and IP address of the Grid member. The NIOS appliance does not validate these entries. Therefore, if you change the IP address of a Grid member listed here, you must update the Grid member information in this list as well.  
You can specify multiple primary servers for redundancy. If the primary server is a NIOS appliance, the appliance must have the Minimal Response feature disabled so it can propagate the data to the stub server. For information about the Minimal Response feature, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[Specifying](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[Minimal](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[Responses](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*.  
Optionally, click the **Don't** **use** **forwarders** **to** **resolve** **queries** **in** **subzones** checkbox to indicate that the name servers hosting the stub zone must not use forwarders to resolve queries for domain names in the stub zone or in its subzones.
5. Click **Next** to specify a stub member NS group or define the name servers individually to serve the forward-mapping stub zone. Select one of the following:
  - Select **Use** **this** **name** **server** **group** to assign a stub member NS group for the zone. You can select the stub member NS group from the drop-down list. For information about stub member NS group, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Stub](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833) [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Member](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Name](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Groups](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*.
  - Select **Use** **this** **set** **of** **name** **servers** to define the servers individually. Click the Add icon and select one of the following:
    - **Add** **Infoblox** **Member**: Select this and select the Grid member that hosts the stub zone.
    - **Add** **Microsoft** **Server**: Select this and select the Microsoft server that hosts the stub zone. The following is displayed for each name server:
    - **Name**: Displays the name of the name server.
    - **IPv4** **Address**: Displays the IPv4 address of the name server.
    - **IPv6** **Address**: Displays the IPv6 address of the name server.
6. Click **Next** to continue to the next step where you define extensible attributes as described in [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Extensible](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868) [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Attributes](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*.
7. Save the configuration and click **Restart** if it appears at the top of the screen   
or  
Click the Schedule icon at the top of the wizard to schedule this task. In the *Schedule* *Change* panel, enter a date, time, and time zone. For information, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[Scheduling](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[Tasks](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*.

You can define two types of reverse-mapping stub zones, one for IPv4 addresses and one for IPv6 addresses. To configure an IPv4 reverse-mapping stub zone:

1. From the **Data** **Management** tab, select the **DNS** tab, expand the Toolbar and click **Add** -> **Zone** -> **Add** **Stub** **Zone**.
2. In the *Add* * Stub * *Zone* wizard, click **Add ** **a ** **stub ** **IPv4 ** **reverse-mapping** ** zone** and click **Next**.
3. Specify the following:
  - **IPv4** **Network:** Enter the IPv4 address for the address space for which you want to define the
  - reverse-mapping zone and select a netmask from the **Netmask** drop-down list. Alternatively, you can specify the address in CIDR format, such as 192/8.
  - To use an RFC 2317 prefix, select a netmask value that is between 25 to 31, inclusive. Grid Manager displays the **RFC** **2317** **Prefix** field. Enter a prefix in the text field. Prefixes can be alphanumeric characters. For information, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>*<span style="color: #0000ff">[Specifying](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>*<span style="color: #0000ff">[an](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>*<span style="color: #0000ff">[RFC](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>*<span style="color: #0000ff">[2317](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>*<span style="color: #0000ff">[Prefix](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35816782/Creating+an+Authoritative+Reverse-Mapping+Zone#CreatinganAuthoritativeReverse-MappingZone-bookmark1733)</span>*.
  - or
  - **Name:** Enter the domain name of the reverse-mapping zone.
  - **DNS** **View:** This field displays only when there is more than one DNS view in the network view. Select a DNS view from the drop-down list.
  - **Comment:** Optionally, enter additional information about the zone.
  - **Disable:** Click this checkbox to temporarily disable this zone. Note that disabling a zone may take a longer time to complete depending on the size of the data.
  - **Lock**: Click this checkbox to lock the zone so that you can make changes to it, and also prevent others from making conflicting changes.
4. Click **Next** to define primary servers in the stub zone. You can specify a forward/stub server NS group or define the servers individually. Select one of the following:
  - Select **Use** **this** **name** **server** **group** to assign a forward/stub server NS group for the stub zone. You can select the forward/stub server NS group from the drop-down list. For information about forward/stub server NS group, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Forward/Stub](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Name](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Groups](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*[.](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)
  - Select **Use** **this** **set** **of** **name** **servers** to define primary servers for the stub zone. Click the Add icon and enter the **Name** and **IP** **Address** of the primary server in the stub zone.  
If the primary server is a Grid member, you must enter the host name and IP address of the Grid member. The NIOS appliance does not validate these entries. Therefore, if you change the IP address of a Grid member listed here, you must update the Grid member information in this list as well.  
You can specify multiple primary servers for redundancy. If the primary server is a NIOS appliance, the appliance must have the Minimal Response feature disabled so it can propagate the data to the stub server. For information about the Minimal Response feature, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[Specifying](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[Minimal](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[Responses](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*.  
Optionally, click the **Don't** **use** **forwarders** **to** **resolve** **queries** **in** **subzones** checkbox to indicate that the name servers hosting the stub zone should not forward queries that end with the domain name of the stub zone to any configured forwarders.
5. Click **Next** to specify a stub member NS group or define the name servers individually to serve the reverse-mapping stub zone. Select one of the following:
  - Select **Use** ** this ** **name** ** server ** **group** to assign a stub member NS group for the zone. You can select the forward/stub server NS group from the drop-down list. For information about stub member NS group, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Stub](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Member](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Name](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Groups](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*.
  - Select **Use ** **this ** **set ** **of ** **name ** **servers** to define the servers individually. Click the Add icon and select one of the following:
    - **Add ** **Infoblox ** **Member**: Select this and select the Grid member that hosts the stub zone.
    - **Add** ** Microsoft** ** Server**: Select this and select the Microsoft server that hosts the stub zone. The following is displayed for each name server:
    - **Name**: Displays the name of the name server.
    - **IPv4** **Address**: Displays the IPv4 address of the name server.
    - **IPv6** **Address**: Displays the IPv6 address of the name server.
6. Click **Next** to continue to the next step where you define extensible attributes as described in [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Extensible](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868) [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Attributes](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*.
7. Save the configuration and click **Restart** if it appears at the top of the screen   
or  
Click the Schedule icon at the top of the wizard to schedule this task. In the *Schedule* *Change* panel, enter a date, time, and time zone. For information, s> Macro (anchor)

ee [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[Scheduling](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[Tasks](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*.

To configure an IPv6 reverse-mapping stub zone:

1. From the **Data** **Management** tab, select the **DNS** tab, expand the Toolbar and click **Add** -> **Zone** -> **Add** **Stub** **Zone**.
2. In the *Add* *Stub* *Zone* wizard, click **Add** **a** **stub** **IPv6** **reverse-mapping** **zone** and click **Next**.
3. Specify the following:
  - **IPv6** ** Network** ** Prefix** and **Prefix ** **Length:** Enter the 128-bit IPv6 address for the address space for which you want to define the reverse-mapping zone. When you enter an IPv6 address, you can use double colons to compress a contiguous sequence of zeros. You can also omit any leading zeros in a four-hexadecimal group. For example, the complete IPv6 address 2006:0000:0000:0123:4567:89ab:0000:cdef can be shortened to 2006::123:4567:89ab:0:cdef. Note that if there are multiple noncontiguous groups of zeros, the double colon can only be used for one group to avoid ambiguity. The NIOS appliance displays an IPv6 address in its shortened form, regardless of its form when it was entered. You can enter a slash and prefix length in the IPv6 Network Prefix field or you can choose a value from the Prefix Length drop-down list.  
or
  - **Name:** Enter the domain name of the reverse-mapping zone.
  - **DNS** ** View:** This field displays only when there is more than one DNS view in the current network view. Select a DNS view from the drop-down list.
  - **Comment:** Enter a descriptive comment about the zone.
  - **Disable:** Click this checkbox to temporarily disable this zone. Note that disabling a zone may take a longer time to complete depending on the size of the data.
  - **Lock**: Click this checkbox to lock the zone so that you can make changes to it and prevent others from making conflicting changes.
4. Click **Next** to define primary servers in the stub zone. You can specify a forward/stub server NS group or define the servers individually. Select one of the following:
  - Select **Use** **this** **name** **server** **group** to assign a forward/stub server NS group for the stub zone. You can select the forward/stub server NS group from the drop-down list. For information about forward/stub server NS group, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Forward/Stub](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Name](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*<span style="color: #0000ff">[Groups](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)</span>*[.](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1834)
  - Select **Use** **this** **set** **of** **name** **servers** to define primary servers for the stub zone. Click the Add icon and enter the **Name** and **IP** **Address** of the primary server in the stub zone.  
If the primary server is a Grid member, you must enter the host name and IP address of the Grid member. The NIOS appliance does not validate these entries. Therefore, if you change the IP address of a Grid member listed here, you must update the Grid member information in this list as well.  
You can specify multiple primary servers for redundancy. If the primary server is a NIOS appliance, the appliance must have the Minimal Response feature disabled so it can propagate the data to the stub server. For information about the Minimal Response feature, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[Specifying](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[Minimal](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*<span style="color: #0000ff">[Responses](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35419409)</span>*.  
Optionally, click the **Don't** **use** **forwarders** **to** **resolve** **queries** **in** **subzones** checkbox to indicate that the name servers hosting the stub zone should not forward queries that end with the domain name of the stub zone to any configured forwarders.
5. Click **Next** to specify a stub member NS group or define the name servers individually to serve the reverse-mapping stub zone. Select one of the following:
  - Select **Use** **this** **name** **server** **group** to assign a stub member NS group for the zone. You can select the stub member NS group from the drop-down list. For information about stub member NS group, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Stub](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833) [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Member](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Name](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Server](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*<span style="color: #0000ff">[Groups](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35784971/Using+Name+Server+Groups#UsingNameServerGroups-bookmark1833)</span>*.
  - Select **Use** **this** **set** **of** **name** **servers** to define the servers individually. Click the Add icon and select one of the following:
    - **Add** **Infoblox** **Member**: Select this and select the Grid member that hosts the stub zone.
    - **Add** **Microsoft** **Server**: Select this and select the Microsoft server that hosts the stub zone.   
The following is displayed for each name server:
    - **Name**: Displays the name of the name server.
    - **IPv4** **Address**: Displays the IPv4 address of the name server.
    - **IPv6** **Address**: Displays the IPv6 address of the name server.
6. Click **Next** to continue to the next step where you define extensible attributes as described in [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Using](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Extensible](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868) [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*<span style="color: #0000ff">[Attributes](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#bookmark868)</span>*.
7. Save the configuration and click **Restart** if it appears at the top of the screen   
or  
Click the Schedule icon at the top of the wizard to schedule this task. In the *Schedule* *Change* panel, enter a date, time, and time zone. For information, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[Scheduling](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*<span style="color: #0000ff">[Tasks](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35446174)</span>*.

## > Macro (anchor)

Viewing and Modifying SOA Reco> Macro (anchor)

rds

The timer values in the SOA record determine when the zone data is updated. The MNAME field and the RNAME field of the SOA record display the FQDN of the primary server and the administrative email address respectively. You can view these default values and override them when necessary. For a zone that has multiple primary servers, Grid Manager displays all configured primaries for the zone. You can click **Override** to override the Grid-level settings. If the primary server is a Microsoft server however, the **Override** option does not appear. You can only change certain values in the SOA record.  
  
To view and modify zone SOA record values:

1. From the **Data** **Management** tab, select the **DNS** tab -> **Zones** tab -> *zone* checkbox, and then click the Edit icon.
2. In the *Authoritative* *Zone* or *Stub* *Zone* editor, click the **Settings** tab to view the following values. You can also click **Override** to modify some of the values.
  - **Serial** **number**: The current serial number for the primary server. This number is automatically increased when changes are made to the zone or its record. The serial number plays a key role in determining when and whether zone data is updated. You can change the serial number only if the primary server of the zone is a Grid member. When the zone has multiple primary servers, each primary can have its own serial number. In this case, the serial number displayed here is always that of the Grid Master, which will also appear in the primary name server list if it is one of the primaries for the zone.
  - **Refresh:** This interval tells secondary servers how often to send a message to the primary server for a zone to check that their data is current, and retrieve fresh data if it is not. The default is three hours.
  - **Retry:** This interval tells the secondary server how long to wait before attempting to recontact the primary server after a connection failure between the two occurs. The default is one hour.
  - **Expire:** If the secondary fails to contact the primary for the specified interval, the secondary stops giving out answers about the zone because the zone data is too old to be useful. The default is 30 days.
  - **Default** **TTL:** Specifies how long name servers can cache the data. The default is eight hours.
  - **Negative-caching** **TTL** **(Time** **to** **Live):** Specifies how long name servers can cache negative responses. The default is 15 minutes.
  - **Primary** **name** **server** **(for** **SOA** **MNAME** **field):** If the primary name server of a zone is a Grid member, the MNAME is inherited from its corresponding member, and you can change the name of the primary name server that is published in the MNAME field of the SOA record. This field accepts names in native character sets. If the zone has multiple primary name servers, a list of all primaries is displayed in this section. Each primary has its own serial number and the number can be different among them. Note that the serial numbers for these primaries are read-only and you cannot modify them. If you change the serial number of the Grid Master, serial numbers for all primaries will be changed to the same number.
  - **Email** **Address** **(for** **SOA** **RNAME** **field):** If the primary name server of a zone is a Grid member, you can enter an administrator email address to the SOA record to help people determine who to contact about this zone. The appliance supports IDN for the host name of the Email address. For example, you can create admin@инфоблокс.рф but not админ@инфоблокс.рф.com.
  - **Don't** **use** **forwarders** **to** **resolve** **queries** **in** **subzones:** Select this option to disable the use of forwarders to resolve queries for data in subzones.
3. Save the configuration and click **Restart** if it appears at the top of the screen.  
To schedule this task, click the Schedule icon at the top of the wizard. In the Schedule Change panel, click **Later**, and then specify a date, time, and time zone. The Schedule icon is green when there is a pending scheduled task. You can reschedule the task if you have the applicable permissions.

## Configuration Example: Configuring a Stub Zone in a Grid

This example illustrates how to configure a stub zone and assign it to a Grid member. You configure a Grid, corpxyz, with a single Grid Master and Grid member. The Grid member, member1.corpxyz.com, is the primary name server for the corpxyz.com zone in the internal view. The Grid Master, gm-corpxyz.com, hosts the stub zone for corpxyz.com in the external view. Thus, when the Grid Master receives a query for the corpxyz.com zone, it sends it directly to member1.corpxyz.com, the primary name server for the zone.  
  
In this example, you configure the following:

1. Turn off minimal responses on member1.corpxyz.com, the primary name server for the corpxyz.com zone. See *<span style="color: #0000ff">[Disable](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Minimal](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Responses](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*.
2. Create the internal and external views. See [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Create](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[the](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Views](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*.
3. Create the corpxyz.com authoritative zone and stub zone. See [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Create](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[the](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*<span style="color: #0000ff">[Zones](https://infoblox-docs.atlassian.net/wiki/spaces/nios85draft/pages/26476883)</span>*.

  
> Macro (anchor)

 **Disable** **Minimal** **Responses**   
After you create the Grid, turn off minimal responses for member1.corpxyz.com. Disabling minimal responses ensures that member1.corpxyz.com propagates the required data to the server hosting the stub zone.

1. From the **Data** **Management** tab, select the **DNS** tab, click **Members** -> **member1.corpxyz.com** checkbox -> Edit icon.
2. In the *Member* *DNS* *Configuration* editor, click the **General** -> **Basic** tab.
3. Clear the **Return** **minimal** **responses** checkbox.
4. Save the configuration and click **Restart** if it appears at the top of the screen.

  
> Macro (anchor)

 **Create the** **Views**   
Create the internal and external views. To create each view:

1. From the **Data** **Management** tab, select the **DNS** tab, expand the Toolbar and click **Add** **DNS** **View**.
2. In the *Add* *DNS* *View* wizard, enter the name of the view. In this example, enter either **External** or **Internal**.
3. Click **Save** **&** **New** and create the other DNS view.

  
> Macro (anchor)

 **Create the** **Zones**   
Create the corpxyz.com zone in the internal view and assign member1.corpxyz.com as the Grid primary server:

1. From the **Data** **Management** tab, select the **DNS** tab, expand the Toolbar and click **Add** -> **Zone** -> **Add** **Auth** **Zone**.
2. In the *Forward* *Authoritative* *Zone* wizard, do the following:
  - Select **Add** **an** **authoritative** **forward-mapping** **zone** and click **Next**.
  - Enter the zone name, **corpxyz.com** and select the **Internal** DNS view. Click **Next.**
  - Select **Use** **this** **set** **of** **name** **servers** and select **member1.corpxyz.com** as the Grid primary server.
3. Save the configuration and click **Restart** if it appears at the top of the screen.

After you create the zone, you can view the NS and A records which were automatically created.  
Create the stub zone, corpxyz.com, in the external view, assign gm-corpxyz.com as the stub member and member1.corpxyz.com as the stub primary server.

1. From the **Data** **Management** tab, select the **DNS** tab, expand the Toolbar and click **Add** -> **Zone** -> **Add** **Stub** **Zone**.
2. In the *Stub* *Zone* wizard, do the following:
  - Select **Add** **a** **stub** **forward-mapping** **zone** and click **Next**.
  - Enter the name of the stub zone, **corpxyz.com** and select the **External** DNS view. Click **Next**.
  - In the *Master* *Name* *Servers* panel, click the Add icon and enter the following for the primary name server, and then click **Next**:
    - **Name**: member1.corpxyz.com
    - **Address**: 10.35.0.222
  - In the *Name* *Servers* panel, click the Add icon and select **gm-corpxyz.com**.
3. Save the configuration and click **Restart** if it appears at the top of the screen.

After you create the stub zone, the server hosting the stub zone, gm-corpxyz.com, sends queries to the primary server, member1.corpxyz.com, for the SOA and NS records. member1.corpxyz.com then returns its NS records and A (address) records.