Forum Discussion
FFive
Altocumulus
AltocumulusDNS queries flapping between external and internal vIPs even if the source requests is internal.
I am trying to understand what could be causing this sort of behavior. In our environment we multiple domain controllers that delegate to the F5 GTM. We set up the GTM to respond to internal queries ...
First make sure the virtual servers are limited to listen on either the external or internal VLANs. It sounds like a routing issue in your network. You can use tcpdump to see on what VLANs the requests are being received. The syntax below will also log the source MAC address.
tcpdump -enni 0.0:nnnp udp port 53