Bug ID 1007113: Pool member goes DOWN if the time difference between SCTP INIT and SCTP ABORT is less than two seconds

Last Modified: Sep 23, 2021

Bug Tracker

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

Known Affected Versions:
14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 15.1.1, 15.1.2,, 15.1.3,, 15.1.4, 16.0.0,, 16.0.1,,, 16.1.0

Opened: Mar 28, 2021
Severity: 2-Critical


In case of diameter over SCTP, while aborting the connection of the pool member, if SCTP INIT is sent by the BIG-IP system before the SCTP ABORT is processed, the pool member is marked UP (provided the SCTP connection is established successfully), and then goes down later, immediately after ABORT is fully processed.


Pool member is marked DOWN even though it is active


The time difference between SCTP ABORT and SCTP INIT is very small, i.e., 2 seconds or less


If the watchdog is configured in the diameter session profile (i.e., watchdog-timeout is greater than 0), the pool member is marked UP after DWA is received from the pool member.

Fix Information


Behavior Change