Which command does a network engineer use to verify the spanning-tree status for VLAN 10?

Which command does a network engineer use to verify the spanning-tree status for VLAN 10?
A . switch# show spanning-tree vlan 10
B . switch# show spanning-tree bridge
C . switch# show spanning-tree brief
D . switch# show spanning-tree summary
E . switch# show spanning-tree vlan 10 brief

View Answer

Answer: A

Explanation:

Command Description

show spanning-tree Displays information about the spanning-tree state.

Example output: SW2#show spanning-tree vlan 10

VLAN0010 Spanning tree enabled protocol rstp Root ID Priority 24586 Address 0014.f2d2.4180 Cost 9 Port 216 (Port-channel21) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 32778 (priority 32768 sys-id-ext 10) Address 001c.57d8.9000 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec

Interface Role Sts Cost Prio.Nbr Type ——————- —- — ——— ——– ————————— Po21 Root FWD 9 128.216 P2p Po23 Altn BLK 9 128.232 P2p

Reference: http://www.cisco.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2.html