You can use the Infoblox GUI to configure the order that the appliance uses to return the A and AAAA records associated with an Infoblox host. This feature is useful when you want the appliance to return the A and AAAA records of a host in a specific order. For example, if you want the management address to appear first on a list of IP addresses associated with a network device, you can configure the order of the IP addresses so the management address is always returned first on the list when you look up the name of the device. For information about using the Infoblox API to configure RRset order (resource record order) of a host, refer to the Infoblox API Documentation.
To specify an RRset order of a host record, you must first enable the feature at the Grid level. When you enable this feature and there are multiple IP addresses associated with the host record, you can specify one of the following RRset orders through the Host Record wizard and editor:
For information about specifying RRset order of a host record, see Adding Host Records.
Note that when you configure an order type for the IP addresses associated with a host record, the order type applies to both the A and AAAA records of the host. It does not apply to any non-host A or AAAA records that may have the same owner name as the host record. By default, the appliance returns resource records in a cyclic or round robin order. The return order of non-authoritative data retrieved from a recursion is not affected by the host RRset order, and that remains cyclic.
When you enable the RRset order for hosts at the Grid level, you may not be able to maintain the same DNS responses on a recursive server if it exists in the Grid. You can preserve the original cached DNS responses by configuring a fixed RRset order on the recursive server so it can return A and AAAA records associated with domain names in the original order they were received. For information about configuring the RRset order for the cached DNS responses, see Preserving the RRset Order for Cached DNS Responses.
To enable the configuration of RRset order for a host record:
By default, when a client queries a domain name, the DNS caching appliance returns the A and AAAA records of the domain name in the cyclic order. However, this default behavior can be overridden if you have enabled and configured (at the Grid level) fixed RRset order for hosts that have multiple addresses. When you override the default behavior and preserve the fixed RRset order for cached DNS responses, the DNS caching appliance returns A and AAAA records associated with domain names in the order they were received from an upstream server. You can preserve the RRset order for the cached DNS responses and specify the fixed RRset order for A, AAAA, or both A and AAAA records at the Grid level and override at the member and DNS view levels. Note that configuring fixed RRset order for specific FQDNs might slightly affect the performance of the DNS caching appliance.
To preserve the fixed RRset order for cached DNS responses at the Grid, member, or DNS view level:
FQDN: Enter the fully qualified domain name with which the A or AAAA record is associated.
For Infoblox-4030, if you enter a wildcard character as part of the domain name, the appliance considers the wildcard character as a literal character. For example, if you enter test*.com, the appliance matches the domain name with test*.com only.
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