[RST, ACK] from F5

It would help to see both the client to VIP and LTM to pool member communication. It looks like the VIP (or more likely the pool member) FINs the connection and the client ACKs the FIN, but does not send its own FIN as part of the four way close. As a result, LTM (or the pool member) RSTs the connection after the FIN WAIT timeout expires.

 

 

It should be pretty quick to get an answer from F5 Support if you capture a binary formatted tcpdump of the issue. You can use syntax similar to this for the capture:

 

 

tcpdump -i 0.0 -s0 -w/var/tmp/trace.dmp host CLIENT_IP or host POOL_IP

 

 

Aaron