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

Last Modified: May 29, 2024

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

Known Affected Versions:
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, 16.1.1

Fixed In:
17.0.0, 16.1.2,,

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

The system now marks the pool member as UP if DWA is received from the pool member.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips