Bug ID 429368: SIP RTP/RTCP connections do not honor LSN pool translation port ranges

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.3.0, 11.4.0, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10

Fixed In:
11.6.0

Opened: Aug 30, 2013

Severity: 3-Major

Related Article: K14725

Symptoms

Session Initiation Protocol (SIP) RTP/RTCP connections do not honor Large Scale NAT (LSN) pool translation port ranges.

Impact

Its is not possible to trace which subscriber initiated a RTP/RTCP connection using LSN logs.

Conditions

This affects all SIP RTP/RTCP connections in all LSN modes(NAPT and DNAT). The BIG-IP system chooses any valid ephemeral port instead of the range specified in the LSN pool.

Workaround

There is no workaround for this issue.

Fix Information

SIP media connections now select ports using the CGNAT port selection modes. Media connections will be traceable using standard methods.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips