Bug ID 430108: CGNAT - all traffic stops after failover with connection limits enabled

Last Modified: Feb 13, 2019

Bug Tracker

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

Known Affected Versions:
11.2.1, 11.3.0, 11.4.0, 11.4.1

Fixed In:
11.5.0, 11.4.1 HF2, 11.4.0 HF4

Opened: Sep 09, 2013
Severity: 2-Critical
Related AskF5 Article:
K15644

Symptoms

After a failover, all traffic for any connected subscribers may stop completely. The command "lsndb list client" shows connection counts at the limit.

Impact

After a failover, all traffic for any connected subscribers may stop completely.

Conditions

This happens when an LSN pool with the connection-limit set to greater than 0 fails over with active connections.

Workaround

To work around this problem, disable connection mirroring and disable session mirroring.

Fix Information

Connection limits are now managed correctly on the standby device so that connection limits are not exceeded erroneously.

Behavior Change