Bug ID 448632: 200 OK not forwared when dialog-aware is enabled.

Last Modified: Oct 06, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP LTM(all modules)

Known Affected Versions:
10.2.4, 11.0.0, 11.1.0

Fixed In:
10.2.4 HF8

Opened: Feb 11, 2014
Severity: 2-Critical
Related AskF5 Article:


When message flow is: 1. INVITE/180/200/ACK call from client to server 2. in-dialog re-INVITE from server to client INVITE/100/200/ACK 200 OK response message not forwarded.


200 OK not forwarded for INVITE and re-INVITE scenarios occasionally.


In the SIP profile, dialog-aware is enabled.


There is no workaround for this issue.

Fix Information

Fixed the race-condition occurring when 2 response messages are processing dialog lookup.

Behavior Change