opens a permanent loop. However, this problem does not occur in Layer 2 switched networks that are
connected by point-to-point links.
Figure 19: Bridging Loops on Shared Segments
How to Configure MSTP Features
Specifying the MST Region Configuration and Enabling MSTP
For two or more switches to be in the same MST region, they must have the same VLAN-to-instance mapping,
the same configuration revision number, and the same name.
A region can have one member or multiple members with the same MST configuration; each member must
be capable of processing RSTP BPDUs. There is no limit to the number of MST regions in a network, but
each region can only support up to 65 spanning-tree instances. You can assign a VLAN to only one
spanning-tree instance at a time.
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
spanning-tree mst configuration
4.
instance instance-id vlan vlan-range
5.
name name
6.
revision version
7.
show pending
8.
exit
9.
spanning-tree mode mst
10.
end
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
261
How to Configure MSTP Features
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