---
title: "Configuring DNS Traffic Control Properties"
canonical: "https://docs.infoblox.com/space/nios85/35915010/Configuring%20DNS%20Traffic%20Control%20Properties"
format: markdown
---
You can configure the DNS Traffic Control properties at the Grid or member level. The member DNS traffic control properties are inherited from the Grid <span style="color: #172b4d">DNS traffic control</span> properties unless you override them.  
The following sections explain how to configure <span style="color: #172b4d">DNS traffic control</span> properties for the Grid or a Grid member.

# Configuring Grid DNS Traffic Control Properties

To configure DNS Traffic Control properties for the Grid:

1. From the **Data** **Management** tab, select the **DNS** tab, expand the Toolbar and click **Grid** **DNS** **Properties**.
2. In the **Traffic** **Control** tab, complete the following:
  - **Extensible** **Attributes** **Source** **Types** **for** **Topology** **Rules**: Specify up to four extensible attributes to use as source types when defining DNS traffic control topology rules. For information about the extensible attribute topology rules, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)</span>*<span style="color: #0000ff">[Defining](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)</span>*<span style="color: #0000ff">[Topology](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)</span>*<span style="color: #0000ff">[Rulesets](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35482350/Configuring+Topology+Rules+and+Rulesets#ConfiguringTopologyRulesandRulesets-bookmark2099)</span>*.  
You can use either predefined EAs or your own. For information about predefined extensible attributes, see *<span style="color: #0000ff">[Managing Extensible](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912)</span>*<span style="color: #0000ff">[Attributes](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912)</span>*. For information about creating custom extensible attributes, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)</span>*<span style="color: #0000ff">[Adding](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)</span>*<span style="color: #0000ff">[Extensible](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)</span>*<span style="color: #0000ff">[Attributes](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35448912/Managing+Extensible+Attributes#Adding Extensible Attributes)</span>*.
  - **When** **DNS** **Traffic** **Control** **is** **enabled,** **direct** **traffic** **according** **to** **EDNS0** **Client** **Subnet** **when** **possible**: Select this checkbox to direct traffic according to EDNS0 client subnet option when DNS Traffic Control is processing DNS queries.  
You can enable the appliance to redirect traffic according to EDNS0 client subnet option when DNS Traffic Control is processing DNS queries that contain the EDNS0 client subnet option. When you enable this feature, DNS Traffic Control querying process uses the client address specified in the EDNS0 client subnet option of the DNS query and the appliance includes the EDNS0 client subnet option in the response message. If there are multiple EDNS0 client subnet options in a query, the appliance considers only the first option and ignores the other options. When this feature is disabled, DNS Traffic Control querying process ignores the EDNS0 client subnet option. For more information about EDNS0, see *[Using Extension Mechanisms for DNS (EDNS0)](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35483175)*.
  - **Return** **DNS** **responses** **if** **there** **are** **no** **DTC** **responses** **available**: Select this if you want the appliance to return DNS responses if no DNS traffic control responses are available.
  - **Return** **the** **following** **type** **of** **response** **from** **DNSSEC** **signed** **zones**: Select one of the following response types for DNSSEC-signed zones:
    - Signed
    - Unsigned  
For more information on the Signed and Unsigned modes, see [ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)</span>*<span style="color: #0000ff">[Managing](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)</span>*<span style="color: #0000ff">[LBDN](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)</span>*<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)</span>[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)<span style="color: #0000ff">[ ](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)</span>*<span style="color: #0000ff">[Records](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)</span>*<span style="color: #0000ff">[.](https://infoblox-docs.atlassian.net/wiki/spaces/nios85/pages/35914884/Managing+DNS+Traffic+Control+Objects#ManagingDNSTrafficControlObjects-ManagingLBDNRecords)</span>
3. Save the configuration and click **Restart** if it appears at the top of the screen.

# Configuring Member DNS Traffic Control Properties

To configure DNS Traffic Control properties for a Grid member:

1. From the **Data** **Management** tab, select the **DNS** tab -> **Members** tab -> *member* checkbox -> Edit icon.  
Alternatively, you can select the **DNS** tab -> **Traffic** **Control** tab, click **Member** **DNS** **Properties** in the Toolbar, and then select the required member.
2. In the **Traffic****Control** tab, complete the following:
  - **DTC**** Health ****Check ****Source**: Select which NIOS network interface to use for the <span style="color: #172b4d">DNS traffic control</span> health check. Choose one of the following:
    - ANY
    - VIP
    - LAN2
    - MGMT
    - IP (This is displayed only when you have configured additional IP addresses in the network settings. Specify the IP address of the source.)
  - **When ****DNS ****Traffic ****Control ****is ****enabled, ****direct ****traffic ****according ****to ****EDNS0 ****Client ****Subnet ****when ****possible**: To retain the same setting as the Grid, keep the inherited value. To override the Grid setting, click **Override**. For information, see the *Configuring Grid DNS Traffic Control Properties* section.
3. Save the configuration and click **Restart** if it appears at the top of the screen.