Bug ID 906237: Reject flood packets to prevent L2 learning problems when TCN is generated

Last Modified: Nov 22, 2021

Bug Tracker

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

Fixed In:
16.1.0

Opened: May 05, 2020
Severity: 3-Major

Symptoms

Mac move messages can be observed on the connected switches

Impact

1) Mac move messages can be observed on the connected switches. 2) Traffic will be impacted on failover

Conditions

Virtual wire configured in high availability (HA) mode.

Workaround

N/A

Fix Information

BIG-IP will stop accepting new TCP connections if it detects a topology change during a configurable timeout (l2.virtualwire.tcn.recovery.connection.drop.timeout, default 30). This feature is not enabled by default. To enable l2.virtualwire.tcn.connection.drop this variable needs to be set.

Behavior Change