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Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 13 Configuring MST on EVC Bridge Domain
Contents
• When an MST is configured on the outer VLAN, you can configure any number of service instances
with the same outer VLAN as shown in the following configuration example.
nPE1#sh run int gi0/5
Building configuration...
Current configuration : 373 bytes
!
interface GigabitEthernet0/5
description connected to CE1
no ip address
service instance 100 ethernet
encapsulation dot1q 100 second-dot1q 1
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 100 second-dot1q 2
bridge-domain 101
!
service instance 102 ethernet
encapsulation dot1q 100 second-dot1q 120-140
bridge-domain 102
!
end
nPE1#sh run int gi0/6
Building configuration...
Current configuration : 373 bytes
!
interface GigabitEthernet0/6
description connected to CE1
no ip address
service instance 100 ethernet
encapsulation dot1q 100 second-dot1q 1
bridge-domain 100
!
service instance 101 ethernet
encapsulation dot1q 100 second-dot1q 2
bridge-domain 101
!
service instance 102 ethernet
encapsulation dot1q 100 second-dot1q 120-140
bridge-domain 102
!
end
nPE1#sh span vlan 100
MST0
Spanning tree enabled protocol mstp
Root ID Priority 32768
Address 0018.742f.3b80
Cost 0
Port 2821 (GigabitEthernet12/5)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32768 (priority 32768 sys-id-ext 0)
Address 001a.303c.3400
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------