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F5 GTM (Forwarder)

posted 14 Mar 2017, 13:08 by Donald Ross
when configure Listener a virtual server is created with the following behavior:

if a wide IP match the DNS request:
if the pool assigned to the Wide IP returns a VS, answer with it
if no pool member is available and fallback method is "return to DNS" the request is released to DNS server
if no pool member is available and fallback method is not "return to DNS" the request is ignored
if not, the request is released to DNS
If No pool is assigned to the Listener and the Listener IP is a self IP (floating or not), Released to DNS requests are handled by local Bind

If Pool is assigned to the listener, the DNS request will be load balanced and forwarded to one pool member.

In this configuration, you can assign a pool with your ISP DNS forwarders.
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