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Forum Discussion

Thrillseeker_12's avatar
Thrillseeker_12
Icon for Cirrus rankCirrus
Jun 26, 2016

F5 BIGIP VE with Virtual Forwarding Server dropped some DNS requests...

Hi all,   Last week I had a very strange issue. We have an F5 VE LTM Active/Standby Cluster pair. The setup is running stable for more than 4 months now. In this environment the F5 VE acts as an d...
application delivery
LTM
IainThomson85_1's avatar
IainThomson85_1
Icon for Cumulonimbus rankCumulonimbus
Jun 27, 2016

Out of curiosity - What Software version is in use ?

 

Do you have a tcpdump "client side" that shows the packets going into the F5, and a corresponding one showing nothing going out ?

 

Is there anything strange about the DNS responses going outbound, could they have been truncated and an upstream firewall not allowing a TCP response ?