Forum Discussion

jlarger's avatar
jlarger
Icon for Cirrus rankCirrus
Oct 06, 2023

Behavior of outbound DNS query from LTM behavior

We're having intermittent dns failures from our ltm to fqdn-defined resources. 4 name server IPs are confgured.    Since the GUI provides an up/down order button, I presume ip1 is queried, then ip2...
application delivery
DNS query
  • AubreyKingF5's avatar
    AubreyKingF5
    Oct 06, 2023

    Definitely more than possible to get those stats. Make an LTM pool of your DNS servers, by IP. Use a DNS monitor against them. You don't need a VIP. You just want to health check them. After that, tmos stats should be able to point out the issue.

AubreyKingF5's avatar
AubreyKingF5
Icon for Moderator rankModerator
Oct 06, 2023

Definitely more than possible to get those stats. Make an LTM pool of your DNS servers, by IP. Use a DNS monitor against them. You don't need a VIP. You just want to health check them. After that, tmos stats should be able to point out the issue.