Using Client Subnet in DNS Requests

BIG-IP DNS 14.0 now supports edns-client-subnet (ECS) for both responding to client requests (GSLB) or forwarding client requests (screening). The following is a quick start on using this feature. ...
Published Sep 14, 2018
Version 1.0
application delivery
BIG-IP DNS
johnny_f5's avatar
johnny_f5
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May 09, 2019

Update! Found I can do something like this:

when DNS_REQUEST {
    if { [DNS::edns0 subnet address] contains "10.3.0.0" } {
        pool test member 10.2.0.11 80
    } else { pool test }
}

Also, i found you can lower the TTL for a F5-DNS pool to zero so that there is no TTL to do more of an active/active setup for internal GSLB.

Thanks for you help!