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, and QinQ to Non-QinQ modes, is not allowed. The configuration will not be applied to the tenant, and the change will be rejected, retaining the previous configuration on the tenant side.
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)
Below steps are required to switching 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