Task ID
OperationsTask ID
readethernet-services
Examples
This example shows the output from the show spanning-tree pvrst command, which produces an overview
of the spanning tree protocol state:
RP/0/RSP0/CPU0:router# show spanning-tree pvrst MSTP
Role: ROOT=Root, DSGN=Designated, ALT=Alternate, BKP=Backup
State: FWD=Forwarding, LRN=Learning, BLK=Blocked
VLAN 10:
Root ID Priority 4096
Address 8cb6.4fe9.7b9e
This bridge is the root
Max Age 20 sec, Forward Delay 15 sec
Bridge ID Priority 4096 (priority 4096 sys-id-ext 0)
Address 8cb6.4fe9.7b9e
Max Age 20 sec, Forward Delay 15 sec
Transmit Hold count 6
Interface Port ID Role State Designated Port ID
Pri.Nbr Cost Bridge ID Pri.Nbr
------------ ------- --------- ---- ----- -------------------- -------
Gi0/5/0/0 128.1 20000 DSGN FWD 4096 8cb6.4fe9.7b9e 128.1
Gi0/5/0/2 128.2 20000 DSGN FWD 4096 8cb6.4fe9.7b9e 128.2
VLAN 20:
Root ID Priority 8192
Address c062.6bac.a07e
Max Age 20 sec, Forward Delay 15 sec
Bridge ID Priority 16384 (priority 16384 sys-id-ext 0)
Address 8cb6.4fe9.7b9e
Max Age 20 sec, Forward Delay 15 sec
Transmit Hold count 6
Interface Port ID Role State Designated Port ID
Pri.Nbr Cost Bridge ID Pri.Nbr
------------ ------- --------- ---- ----- -------------------- -------
Gi0/5/0/0 128.1 20000 ROOT FWD 8192 c062.6bac.a07e 128.1
Gi0/5/0/2 128.2 20000 ALT BLK 8192 c062.6bac.a07e 128.2
This example shows the output from the show spanning-tree pvrst command when the brief and blocked-ports
keywords are used:
RP/0/RSP0/CPU0:router# show spanning-tree pvrst st1 brief
VLAN 1 (native-vlan):
This is the Root Bridge
VLAN 101:
Root Port GigabitEthernet0/1/2/2 , Root Bridge ID 0002.9b78.0812
...
RP/0/RSP0/CPU0:router# show spanning-tree pvrst st1 blocked-ports
VLAN 1 (native-vlan):
Cisco ASR 9000 Series Aggregation Services Router VPN and Ethernet Services Command Reference, Release
6.1.x
611
Multiple Spanning Tree Protocol Commands
show spanning-tree pvrst
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