Cisco ASR 9000 Series Configuration Manuallines page 478

Configuring MSTP: Examples
This example shows the output from the show spanning-tree mst command, which produces an overview
of the spanning tree protocol state:
# show spanning-tree mst example
Role: ROOT=Root, DSGN=Designated, ALT=Alternate, BKP=Backup, MSTR=Master
State: FWD=Forwarding, LRN=Learning, BLK=Blocked, DLY=Bringup Delayed
Operating in dot1q mode
MSTI 0 (CIST):
VLANS Mapped: 1-9,11-4094
CIST Root
Root ID
Bridge ID
Interface
------------ ------- --------- ---- ----- -------------------- -------
Gi0/0/0/0
Gi0/0/0/1
Gi0/0/0/2
Gi0/0/0/3
MSTI 1:
VLANS Mapped: 10
Root ID
Bridge ID
Interface
------------ ------- --------- ---- ----- -------------------- -------
Gi0/0/0/0
Gi0/0/0/1
Gi0/0/0/2
Gi0/0/0/3
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L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
452
Priority 4096
Address 6262.6262.6262
This bridge is the CIST root
Ext Cost 0
Priority 4096
Address 6262.6262.6262
This bridge is the root
Int Cost 0
Max Age 20 sec, Forward Delay 15 sec
Priority 4096 (priority 4096 sys-id-ext 0)
Address 6262.6262.6262
Max Age 20 sec, Forward Delay 15 sec
Max Hops 20, Transmit Hold count
Port ID Role State Designated
Pri.Nbr Cost
128.1 20000 DSGN FWD
128.2 20000 DSGN FWD
128.3 20000 DSGN FWD
128.4 20000 ---- BLK
Priority 4096
Address 6161.6161.6161
Int Cost 20000
Max Age 20 sec, Forward Delay 15 sec
Priority 32768 (priority 32768 sys-id-ext 0)
Address 6262.6262.6262
Max Age 20 sec, Forward Delay 15 sec
Max Hops 20, Transmit Hold count
Port ID Role State Designated
Pri.Nbr Cost
128.1 20000 ROOT FWD
128.2 20000 ALT BLK
128.3 20000 DSGN FWD
128.4 20000 ---- BLK
Implementing Multiple Spanning Tree Protocol
6
Port ID
Bridge ID Pri.Nbr
4096 6262.6262.6262 128.1
4096 6262.6262.6262 128.2
4096 6262.6262.6262 128.3
----- -------------- -------
6
Port ID
Bridge ID Pri.Nbr
4096 6161.6161.6161 128.1
4096 6161.6161.6161 128.2
32768 6262.6262.6262 128.3
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