Bug ID 512054: CGNAT SIP ALG - RTP connection not created after INVITE

Last Modified: Apr 28, 2025

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 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, 11.5.1 HF10, 11.5.1 HF11, 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

Opened: Mar 12, 2015

Severity: 3-Major

Related Article: K17135

Symptoms

The client has no audio when it makes a call.

Impact

The BIG-IP system fails to create a media channel for audio/video traffic.

Conditions

This occurs when a client initiates a call with a CSeqID value greater than 64 KB.

Workaround

None.

Fix Information

The BIG-IP system now correctly creates a media channel for audio/video traffic when the CSeqID value greater than 64 KB.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips