Bug ID 811105: MRF SIP-ALG drops SIP 183 and 200 OK messages

Last Modified: Oct 16, 2019

Bug Tracker

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

Known Affected Versions:
13.1.0, 13.1.0.1, 13.1.0.2, 13.1.0.3, 13.1.0.4, 13.1.0.5, 13.1.0.6, 13.1.0.7, 13.1.0.8, 13.1.1, 13.1.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 14.0.0, 14.0.0.1, 14.0.0.2, 14.0.0.3, 14.0.0.4, 14.0.0.5, 14.0.1, 14.1.0, 14.1.0.1, 14.1.0.2, 14.1.0.3, 14.1.0.4, 14.1.0.5, 14.1.0.6, 14.1.2, 14.1.2.1, 15.0.0, 15.0.1

Opened: Jul 30, 2019
Severity: 2-Critical

Symptoms

SIP 183 and 200 OK messages are dropped after an INVITE in MRF SIP-ALG when media info is present in the Session Description Protocol.

Impact

SIP calls are unable to establish media connections.

Conditions

- MRF SIP-ALG default configuration - INVITE sent with media info in SDP - Media info contains an rtcp without an IP address

Workaround

Ensure all RTCP attributes in the SDP have IP addresses. Example: Change "a=rtcp:29974\r\n" to "a=rtcp:29974 IN IP4 10.10.10.10\r\n"

Fix Information

None

Behavior Change