Disable Spanning-Tree Globally

Note: It is not recommended to turn STP off. There is no global command to disable spanning tree globally. But, you can disable all configured VLAN by “no spanning-tree vlan 1(that is on an individual vlan basis) or (have this done in range as shown below. vlan 1 – vlan50)

switch7(config)#no spanning-tree vlan 11-15

Now run the commands below to ensure spanning-tree is disabled for the vlans.

switch7#sh span
No spanning tree instance exists.

or use the full command as shown below

switch7#sh spanning-tree
No spanning tree instance exists.

Note: Only turn off spanning-Tree for the configured vlans on the switch.