Cisco ASR 9000 Series Configuration Guidelines

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 Priority 4096
Address 6262.6262.6262
This bridge is the CIST root
Ext Cost 0
Root ID Priority 4096
Address 6262.6262.6262
This bridge is the root
Int Cost 0
Max Age 20 sec, Forward Delay 15 sec
Bridge ID 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 6
Interface Port ID Role State Designated Port ID
Pri.Nbr Cost Bridge ID Pri.Nbr
------------ ------- --------- ---- ----- -------------------- -------
Gi0/0/0/0 128.1 20000 DSGN FWD 4096 6262.6262.6262 128.1
Gi0/0/0/1 128.2 20000 DSGN FWD 4096 6262.6262.6262 128.2
Gi0/0/0/2 128.3 20000 DSGN FWD 4096 6262.6262.6262 128.3
Gi0/0/0/3 128.4 20000 ---- BLK ----- -------------- -------
MSTI 1:
VLANS Mapped: 10
Root ID Priority 4096
Address 6161.6161.6161
Int Cost 20000
Max Age 20 sec, Forward Delay 15 sec
Bridge ID 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 6
Interface Port ID Role State Designated Port ID
Pri.Nbr Cost Bridge ID Pri.Nbr
------------ ------- --------- ---- ----- -------------------- -------
Gi0/0/0/0 128.1 20000 ROOT FWD 4096 6161.6161.6161 128.1
Gi0/0/0/1 128.2 20000 ALT BLK 4096 6161.6161.6161 128.2
Gi0/0/0/2 128.3 20000 DSGN FWD 32768 6262.6262.6262 128.3
Gi0/0/0/3 128.4 20000 ---- BLK ----- -------------- -------
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L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
452
Implementing Multiple Spanning Tree Protocol
Configuring MSTP: Examples

Cisco ASR 9000 Series Specifications

General

Series	ASR 9000
Category	Network Router
Modular Design	Yes
Redundancy	Yes (Hardware and Software)
Operating System	Cisco IOS XR
Interfaces/Ports	10G, 40G, 100G, 400G Ethernet
Expansion Slots	Varies by model
Routing Protocol	BGP, OSPF, IS-IS, EIGRP
Management	CLI, SNMP, NETCONF
Power Supply	Redundant
Port Density	Varies by model
Power Supply Options	AC, DC
Memory	Varies by model
Storage	Varies by model
Dimensions	Varies by model
Weight	Varies by model