Forum Discussion

daboochmeister's avatar
daboochmeister
Icon for Cirrus rankCirrus
Apr 30, 2019

Fault-tolerant DNS load balancing via LTM - preventing any dropped requests?

(sorry if this is a re-post - i posted a few weeks back, but that post appears to be messed up in the devcentral database)   Env: LTMs running 13.1.1.4 (we also have GTMs, also at 13.1.1.4, but i...
application delivery
dns
fault tolerant
LTM
udp
Vijay_E's avatar
Vijay_E
Icon for Cirrus rankCirrus
May 02, 2019

We are encountering times when our internal DNS responders (Infoblox, btw) will drop individual queries, or simply not respond to them.

Do you know why they aren't responding ? If this reason is known, you may be able to solve it using iRule or any existing feature on the F5 device.

Is the query even reaching the DNS responders ? There is a case where queries are probably not going to reach the responders so the client must be able to re-try. Even with the fault tolerant system, client needs to have the ability to re-try.