Cisco ASR 9000 Series Configuration Guidelines

MSTI 10
VLAN IDs: 40
Role: Root (Edge mode)
Bridge Priority: 32768
Port Priority: 128
Cost: 200000000
Root Bridge: 6161.6161.6161
Root Priority: 61440
Topology Changes: 0
This example shows the output of show spanning-tree mstag bpdu interface, which produces details on the
BPDUs being output and received on a given local interface:
RP/0/RSP0/CPU0:router#show spanning-tree mstag foo bpdu interface GigabitEthernet 0/0/0/0
Transmitted:
MSTI 0 (CIST):
ProtocolIdentifier: 0
ProtocolVersionIdentifier: 3
BPDUType: 2
CISTFlags: Top Change Ack 0
Agreement 1
Forwarding 1
Learning 1
Role 3
Proposal 0
Topology Change 0
CISTRootIdentifier: priority 8, MSTI 0, address 6969.6969.6969
CISTExternalPathCost: 0
CISTRegionalRootIdentifier: priority 8, MSTI 0, address 6969.6969.6969
CISTPortIdentifierPriority: 8
CISTPortIdentifierId: 1
MessageAge: 0
MaxAge: 20
HelloTime: 2
ForwardDelay: 15
Version1Length: 0
Version3Length: 80
FormatSelector: 0
Name: 6969:6969:6969
Revision: 0
MD5Digest: ac36177f 50283cd4 b83821d8 ab26de62
CISTInternalRootPathCost: 0
CISTBridgeIdentifier: priority 8, MSTI 0, address 6969.6969.6969
CISTRemainingHops: 20
MSTI 1:
MSTIFlags: Master 0
Agreement 1
Forwarding 1
Learning 1
Role 3
Proposal 0
Topology Change 0
MSTIRegionalRootIdentifier: priority 8, MSTI 1, address 6969.6969.6969
MSTIInternalRootPathCost: 0
MSTIBridgePriority: 1
MSTIPortPriority: 8
MSTIRemainingHops: 20
This example shows the output of show spanning-tree mstag topology-change flushes, which displays
details about the topology changes that have occurred for each interface:
#show spanning-tree mstag b topology-change flushes
MSTAG Protocol Instance b
L2VPN and Ethernet Services Configuration Guide for Cisco ASR 9000 Series Routers, IOS XR Release 6.3.x
457
Implementing Multiple Spanning Tree Protocol
Configuring MSTAG: 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