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Hi Scott,

 

 

Can you post an anonymized copy of the VIP, HTTP class, HTTP profile and pool configuration (using b VIP_NAME list, b profile httpclass CLASS_NAME list, b profile http HTTP_PROFILE_NAME list, etc)? Are you using an HTTP class to select a pool? I assume you're not using ASM if you're planning on using Web Accelerator.

 

 

Are you able to reproduce this? If so, I think it would be helpful to capture a tcpdump of the client and server side traffic. If you can get one trace of a successful request and one trace of a failed request, it would help. If you haven't used tcpdump before, there are a couple of solutions on AskF5 you can check:

 

 

SOL411: Overview of packet tracing with the tcpdump utility

 

https://support.f5.com/kb/en-us/solutions/public/0000/400/sol411.html

 

 

SOL6546: Recommended methods and limitations for running tcpdump on a BIG-IP version 9.x system

 

https://support.f5.com/kb/en-us/solutions/public/6000/500/sol6546.html

 

 

You can use syntax like the following to run the trace:

 

 

tcpdump -ni 0.0 -s0 -w/var/tmp/`/bin/hostname`.FF_working.dmp host CLIENT_IP or host SERVER_IP

 

 

tcpdump -ni 0.0 -s0 -w/var/tmp/`/bin/hostname`.FF_breaking.dmp host CLIENT_IP or host SERVER_IP

 

 

If you need help analyzing the tcpdumps, you can open a case with F5 Support.

 

 

Aaron