Configuring Mst; Enabling Mst - Cisco WS-C2950SX-48-SI Configuration Manual

Configuring MST

Configuring MST
The following sections describe how to configure MST:

Enabling MST

To enable and configure MST on the switch, perform this task in privileged mode:
Task
Step 1
Begin in PVST+ mode.
Step 2 Display the STP ports.
Step 3
Configure the MST region.
Step 4
Verify your configuration.
Step 5
Map VLANs to the MST instance.
Step 6 Commit the new region mapping.
Step 7
Enable MST.
Step 8
Verify your MST configuration.
Step 9 Verify your MST instance configuration. show spantree mst instance
Step 10
Verify your MST module and port
configuration.
These examples show how to enable MST:
Console> (enable)
Console> (enable) set spantree mode pvst
Spantree mode set to PVST+.
Console> (enable) show spantree active
VLAN 1
Spanning tree mode
Spanning tree type
Spanning tree enabled
Designated Root
Designated Root Priority
Designated Root Cost
Designated Root Port
Root Max Age
Bridge ID MAC ADDR
Bridge ID Priority
Bridge Max Age 20 sec
Port
Channel_id
------------------------ ---- ------------- --------- ---- --------
----------
6/1
6/2
Console> (enable)
Catalyst 4500 Series, Catalyst 2948G, Catalyst 2980G Switches Software Configuration Guide
7-46
Command
set spantree mode mst [mistp | pvst+ | mistp-pvst+ | mst]
show spantree active
set spantree mst config {[name name] | [revision number]
[commit | rollback | force]}
show spantree mst config
set spantree mst instance vlan vlan
set spantree mst config commit
set spantree mode mst [mistp | pvst+ | mistp-pvst+ | mst]
show spantree mst config
show spantree mst mod/port
PVST+
ieee
00-50-3e-66-d0-00
24576
104
6/1
20 sec Hello Time 2
00-10-7b-bb-2f-00
32768
Hello Time 2
Vlan Port-State
1 forwarding
1 blocking
sec Forward Delay 15 sec
sec Forward Delay 15 sec
Cost Prio Portfast
4 32 disabled 0
4 32 disabled 0
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Release 8.1
Chapter 7 Configuring Spanning Tree
78-15486-01