GLB Return Nothing on Down

[nkroon1]

Hello! I have a GLB entry that has 1 pool and the pool has 2 members. Currently, if both pool members are down, it returns both answers. I'm looking to have it return nothing when down. Is this a feature that is possible? I thought of setting return code on failure but didn't know if that was the best method, or if there is a preferred method.

Any assistance would be greatly appreciated!

[Nikoolayy1]

1.It seems to me that you are matching the "Return to DNS" load balancing default fallback method.

https://support.f5.com/csp/article/K28650431

2.You can see the available methods here and you may test "Drop Packet":

https://techdocs.f5.com/kb/en-us/products/big-ip-dns/manuals/product/bigip-dns-load-balancing-13-1-0...

3.You may also leave "Return to DNS" unde the Wide IP and attach a modified DNS profile under your listener with "Unhandled Query Actions" set to Reject or other action you like (read about this) and with Use BIND Server on BIG-IP disabled just in case even if it shouldn't be needed to be dissable.

https://support.f5.com/csp/article/K21520582

[Nikoolayy1]

Hello,

Have you solved your issue? Also if needed enable wide-ip logging to see how the wider ip handles the DNS request and if the "Return to DNS" load balancing method is triggered.

https://support.f5.com/csp/article/K25751652