Reference Guide

Conguring MST is a four-step process:
1 Enable MST, if the current running STP version is not MST.
2 (Optional) Map the VLANs to dierent instances to achieve load balancing.
3 Ensure the same region name is congured in all the bridges running MST.
4 (Optional) Congure the revision number.
Congure MST protocol
When you enable MST globally, all L2 physical, port-channel, and VLAN interfaces are automatically assigned to MST instance (MSTI) zero
(0). Within an MSTI, only one path from any one bridge to another is enabled for forwarding.
• Enable MST in CONFIGURATION mode.
spanning-tree mode mst
Congure and verify MSTP
OS10(config)# spanning-tree mode mst
OS10(config)# do show spanning-tree
show spanning-tree mst configuration
Region Name: ravi
Revision: 0
MSTI VID
0 1,7-4093
1 2
2 3
3 4
4 5
5 6
Add or remove interfaces
By default, all interfaces are enabled in L2 switchport mode, and all L2 interfaces are part of spanning-tree.
• Disable spanning-tree on an interface in INTERFACE mode.
spanning-tree disable
• Enable MST on an interface in INTERFACE mode.
no spanning-tree disable
168
Layer 2