Bug ID 447080: VLAN tagged/untagged configuration change requires tmm restart

Last Modified: Oct 06, 2020

Bug Tracker

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

Known Affected Versions:
11.2.1, 11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.1 HF1, 11.5.1 HF10, 11.5.1 HF11, 11.5.1 HF2, 11.5.1 HF3, 11.5.1 HF4, 11.5.1 HF5, 11.5.1 HF6, 11.5.1 HF7, 11.5.1 HF8, 11.5.1 HF9, 11.5.10

Fixed In:
11.6.0, 11.5.2, 11.4.1 HF9

Opened: Feb 03, 2014
Severity: 3-Major
Related AskF5 Article:


On BIG-IP 2000-/4000-series appliances, modifying an interface's VLAN configuration from tagged to untagged, or untagged to tagged, can result in unavailability of traffic on that interface.


Traffic does not pass after this change, until TMM is restarted.


This occurs on BIG-IP 2000-series or 4000-series appliance, connected to an upstream network that expects a tagged (or alternately, untagged) VLAN.


Restarting the tmm with 'bigstart restart tmm' corrects this condition, as does deleting and recreating the VLAN with desired tagging attributes.

Fix Information

VLAN tagged/untagged configuration change occurs immediately, and no longer requires tmm restart.

Behavior Change