Last Modified: May 05, 2026
Affected Product(s):
BIG-IP LTM
Fixed In:
17.5.1.6
Opened: Dec 15, 2025 Severity: 3-Major
Direct switching between Non-QinQ and QinQ modes, or vice versa, is not permitted. The configuration will not be applied to the tenant, and the attempt will be rejected, leaving the previous configuration intact on the tenant.
VLAN Modification and Transition Between Q-in-Q and Non-Q-in-Q Configurations failed
The following steps are required to switch between QinQ and Non-QinQ: -- Remove the VLAN from the F5OS UI -- Delete all tenant vlans configurations (tmsh delete net vlan all) -- Apply a fresh configuration with the required type (Q-in-Q or Non-Q-in-Q)
The following steps are required to switch between QinQ and Non-QinQ: -- Remove the VLAN from the F5OS UI -- Delete all tenant vlans configurations (tmsh delete net vlan all) -- Apply a fresh configuration with the required type (Q-in-Q or Non-Q-in-Q)
Added proper validation and proper steps to do switching between Non-QinQ and QinQ modes