Forum Discussion
LD24_184287
Nimbostratus
Jan 26, 2015Intermittent Dropouts for sever behind F5 LTM
Hi Everyone,
We are using F5 LTM IOS 11.4. Recently we have moved a server behind F5 for load balancing and we have been monitoring the server using Op-Manager monitoring tool.Monitoring server ...
StephanManthey
Nacreous
Jan 27, 2015Hi LD24,
as NikhilB already recommended, a TCPDUMP may help to find out the issue:tcpdump -nnni 0.0:nnnp -s 0 -w /shared/monitoring.cap host
It will trace all client- and serverside traffic initiated by your operations manager tool and perhaps it might make sense to add another filter (i.e. 'and host ) depending on the way you forward the monitoring traffic.
The tcpdump syntax above is adding the so called "F5 Ethernet Trailer" data (the "nnn"-flag in the interface definition) to your raw dump file /shared/monitoring.cap and contains as well the related traffic on "peer" side (triggered by the "p"-flag in the interface definition). Description of and required WireShark plugin to decode the trailer data can be found here on DevCentral. Thanks, StephanHelp guide the future of your DevCentral Community!
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