Bug ID 460751: Zombie blocks timeout when RTP and RTCP connections are deleted.

Last Modified: Sep 13, 2023

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

Known Affected Versions:
11.6.0, 11.6.1, 11.6.2, 11.6.3, 11.6.3.1, 11.6.3.2, 11.6.3.3, 11.6.3.4, 11.6.4, 11.6.5, 11.6.5.1, 11.6.5.2, 11.6.5.3, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 12.1.3, 12.1.3.1, 12.1.3.2, 12.1.3.3, 12.1.3.4, 12.1.3.5, 12.1.3.6, 12.1.3.7, 12.1.4, 12.1.4.1, 12.1.5, 12.1.5.1, 12.1.5.2, 12.1.5.3, 12.1.6, 13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1

Opened: May 06, 2014

Severity: 4-Minor

Symptoms

The RTP and RTCP conn flows get setup in response to the RTSP SETUP request from the client which may ask for one or two connections. When the client has requested UDP connections then those connections are NOT expired when the controlling RTSP connection is closed. For this reason PBA zombie port blocks will not be removed until the RTP and RTCP connections using the ports are deleted.

Impact

zombie port blocks can hang around until the respective RTP and RTCP connections using them are deleted.

Conditions

RTSP, UDP connections.

Workaround

A shorter idle timeout can be configured on the RTSP profile so that RTP and RTCP connections are deleted sooner.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips