Bug ID 2329957: Stale mac masquerade fdb entires are observed on rSeries devices after killing tmm on the active tenant.

Last Modified: Jul 07, 2026

Affected Product(s):
BIG-IP F5OS-A(all modules)

Known Affected Versions:
17.5.1.6

Opened: Jun 08, 2026

Severity: 2-Critical

Symptoms

Stale mac masquerade fdb entires are observed on rSeries devices after killing tmm on the active tenant.

Impact

- traffic disruption possible

Conditions

- HA setup using mac masquerade - the active tmm is killed

Workaround

- perform manual failover twice 'tmsbh run sys failover standby` to remove the unnecessary entries.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips