Bug ID 448493: SIP response from the server to the client get dropped

Last Modified: Nov 07, 2022

Bug Tracker

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

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10, 11.5.2, 11.5.2 HF1, 11.5.3, 11.5.3 HF1, 11.6.0, 11.6.0 HF1, 11.6.0 HF2, 11.6.0 HF3, 11.6.0 HF4

Fixed In:
12.0.0, 11.6.0 HF5, 11.5.3 HF2, 11.4.1 HF9

Opened: Feb 10, 2014
Severity: 3-Major
Related Article:


SIP responses are not forwarded to the client. Instead, the system drops those SIP responses.


Some SIP flows do not complete, which affects the SIP clients.


This occurs when using SIP OneConnect with an iRule that uses the node/snat command in SIP_RESPONSE event in the iRule to direct the SIP response from the server.


Remove the node/snat command from SIP_RESPONSE event processing in the iRule.

Fix Information

iRules node/snat command in the iRule SIP_RESPONSE event now works correctly.

Behavior Change