Replacing a master VLAN

For replacing the existing master VLAN of a topology group, use the master-vlan command with the new master VLAN.

To avoid temporary loops when the master VLAN is replaced by another VLAN, the following recommendation is made:

• Control ports for both the old and the new master VLAN must match.
• The new master VLAN and the old master VLAN must have same ports in the blocking state to avoid the possibility of temporary loops.

If the recommendation is not followed, and a new master VLAN is configured with a different convergence, the configuration is still accepted.

Note

The master VLAN replacement is accepted if both the old and the new master VLANs are spanning-tree disabled.