Forum Discussion
Stanislas_Piro2
Mar 03, 2017Cumulonimbus
Hi,
When you create a wide IP, if Alternate or fallback load balancing method is "Return to DNS", and primary LB method fails, then the request is sent to DNS server of the GTM VS (created when you created a listener).
if the GTM is configured with F5 IP address, then, the GTM Listener send DNS request to local BIND.
when you create a wide IP, each pool members are added in the BIND configuration as A Record for the wide IP name. you can see the BIND configuration in "Zone Runner" menu.
you can see that GTM respond with only one IP address (default behavior, can be changed), when all members are down, BIND respond with multiple values (all wide IP members)
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