Cisco Systems A9014CFD manual This example shows MST on port channels, 13-8

Chapter 13 Configuring MST on EVC Bridge Domain

Contents

encapsulation dot1q 2 bridge-domain 100

!

service instance 2 ethernet encapsulation dot1q 2 second-dot1q 100

bridge-domain 200

The preceding configuration does not affect the MSTP operation on the interface; there is no state change for interface gi4/3 in the MST instance it belongs to.

Router# show spanning-tree mst 1

##### MST1	vlans mapped:	2
Bridge	address 0009.e91a.bc40 priority		32769 (32768 sysid 1)
Root	this switch for	MST1

Interface Role Sts Cost Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Gi4/3Desg FWD 20000 128.1540 P2p

This example shows MST on port channels:

Router# show spanning-tree mst 1

##### MST1 vlans mapped: 3

Bridge address 000a.f331.8e80 priority 32769 (32768 sysid 1) Root address 0001.6441.68c0 priority 32769 (32768 sysid 1) port Po5 cost 20000 rem hops 18

Interface Role Sts Cost Prio.Nbr Type

---------------- ---- --- --------- -------- --------------------------------

Gi2/0/0 Desg FWD 20000 128.257 P2p Po5 Root FWD 10000 128.3329 P2p Po6 Altn BLK 10000 128.3330 P2p

Router# show spanning-tree vlan 3

MST1

Spanning tree enabled protocol mstp

Root ID Priority 32769

Address 0001.6441.68c0

Cost 20000

Port 3329 (Port-channel5)

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)

Address 000a.f331.8e80

Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Interface Role Sts Cost Prio.Nbr Type

------------------- ---- --- --------- -------- --------------------------------

Gi2/0/0 Desg FWD 20000 128.257 P2p Po5 Root FWD 10000 128.3329 P2p Po6 Altn BLK 10000 128.3330 P2p

	Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
13-8	OL-23826-09