Bug ID 849157: An outgoing SCTP connection that retransmits the INIT chunk the maximum number of times does not expire and becomes stuck

Last Modified: Feb 20, 2020

Bug Tracker

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

Known Affected Versions:
15.0.0, 15.0.1, 15.0.1.1, 15.0.1.2, 15.1.0

Opened: Nov 12, 2019
Severity: 3-Major

Symptoms

The outgoing SCTP connection does not expire after attempting to INIT the maximum number of times. It then becomes stuck and does not expire when it reaches its idle-timeout, and cannot be manually deleted.

Impact

Stale SCTP connections are left in the system and start to use up memory. Traffic may be interrupted in certain configurations, as the system thinks it is still attempting to bring up the lost SCTP connection and does not ever try to create a new one.

Conditions

An outgoing SCTP connection is permitted to attempt the INIT retransmit the maximum number of times configured with no responses (accepting or aborting) from the target endpoint.

Workaround

To clear the stale connections, restart tmm: bigstart restart tmm Note: Restarting tmm causes an interruption to traffic.

Fix Information

None

Behavior Change