Forum Discussion
Stefan_Klotz
Cumulonimbus
CumulonimbusAsymmetric routing after software-update not working anymore
We have performed a software update from 13.1.1.5 to 13.1.3.2 on a BIG-IP 4000S. After this we noticed that access to a server is not working anymore (it was working with the old version). Followin...
Hello Stefan.
The behavior of the F5 in 13.1.3.2 have changed.
REF - https://support.f5.com/csp/article/K50533164
REF - https://cdn.f5.com/product/bugtracker/ID726176.html
"Source-port: preserve" now forces a port change, so the behavior have changed since your previous version:
REF - https://support.f5.com/csp/article/K11003
My recomendation is to change your VS source-port option to "preserve-strict".
KR,
Dario.
Simon_Blakely
Employee
EmployeeThat indicates the source port was translated from 3389 to 31463
IN s1/tmm2 : 3389 → 55964 [SYN, ACK, ECN] Seq=0 Ack=1 Win=64000 Len=0 MSS=1460 WS=1 SACK_PERM=1
OUT s1/tmm2 : 31463 → 55964 [SYN, ACK, ECN] Seq=0 Ack=1 Win=64000 Len=0 MSS=1460 WS=1 SACK_PERM=1
^^^^^Check that the virtual has not has port translation enabled.