Supports up to 4096 instances of Spanning Tree
(config)#spanning-tree mode mst
(config)#spanning-tree mst configuration
(config-mst)#revision 1
(config-mst)#instance 1 vlan 12, 34
(config-mst)#instance 2 vlan 56, 90
(config-mst)#name CCIE <--- MST REGION NAME
SW2#show spanning-tree mst configuration
Name [ ]
Revision 1 Instances configured 3
Instance Vlans mapped
-------- ---------------------------------------------------------------------
0 1-11,13-33,35-55,57-89,91-4094
1 12,34
2 56,90
-------------------------------------------------------------------------------
Check the ROOT:
#show spanning-tree root
Root Hello Max Fwd
MST Instance Root ID Cost Time Age Dly Root Port
---------------- -------------------- --------- ----- --- --- ------------
MST0 32768 aabb.cc00.0600 0 2 20 15
MST1 1 aabb.cc00.0600 0 2 20 15
MST2 4098 aabb.cc00.0600 0 2 20 15
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