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Muthukumar_1197's avatar
Muthukumar_1197
Icon for Nimbostratus rankNimbostratus
Nov 07, 2013

Virtual server access logging

Hi All,   I have one requirement that we are using big ip LTM 11.x , In one of the virtual server is not allowing the connecting into members.   So when we trouble shooting , we have not find a...
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Philippe_CLOUP's avatar
Philippe_CLOUP
Icon for Employee rankEmployee
Nov 13, 2013

Hi Muthu, is it Post Mortem logs that you are looking for, or ways to troubleshoot the issue ?

 

If you want to check what happens and the reason why the traffic is not going through the VS to the members, you need to check connectivity, reachability (can you ping the VS from the client ? can you ping the members from the BigIP? are the monitors UP for those members ?)

 

Then you can use the command tcpdump to identify the traffic:

 

tcpdump -eni 0.0 host X.X.X.X -s0

 

if you replace X.X.X.X by the client IP, then you should see the traffic arriving on the clientside. If nothing is coming back from the servers, it can be a routing issue (no route to the client through the BigIP), and in that case, you can try to do SNAT Automap.

 

HTH