Bug ID 2200009: PEM HA failover may cause traffic drops for new connections

Last Modified: Jan 16, 2026

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

Known Affected Versions:
16.1.6.1, 17.1.3, 17.5.1.3, 21.0.0

Opened: Jan 08, 2026

Severity: 3-Major

Symptoms

All traffic belonging to some connections established to the new Active unit immediately after a failover between PEM units could be dropped.

Impact

All traffic belonging to new connections established immediately after a failover could be dropped.

Conditions

- PEM units in HA pair. - New connections established to the new Active unit immediately after a failover.

Workaround

None

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips