I have a cisco c1000-48p-4g-L that has the following global config line.
no spanning-tree vlan 60,70,99,110,207,221,242,455-461,510,666,700,702,705,900
when attempting the below config command:
spanning-tree vlan 99
the cisco accepts the command, but when we look at the config again, it still shows 99 in the no spanning-tree config line.
What are we missing? thanks!