Thursday, April 11, 2019

show spannning-tree vlan XXX output

I am troubleshooting high CPU on a few (5 out of 75) Cisco 3650 (3.07.04E) switches in a flat L2 network. I found that the STP process is floating around 60% on one of the switches.

Is it normal to have all the client interfaces reported in the output of 'show spanning-tree vlan xxx'?

switch#show spanning-tree vlan 200

VLAN0200

Spanning tree enabled protocol rstp

Root ID Priority 4327

Address xxxx.xxxx.xxxx

Cost 4

Port 52 (TenGigabitEthernet1/1/4)

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

Bridge ID Priority 32999 (priority 32768 )

Address xxxx.xxxx.xxxx

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

Aging Time 300 sec

Interface Role Sts Cost Prio.Nbr Type

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

Gi1/0/6 Desg FWD 4 128.6 P2p Edge

Gi1/0/12 Desg FWD 4 128.12 P2p Edge

Gi1/0/14 Desg FWD 19 128.14 P2p Edge

Gi1/0/24 Desg FWD 100 128.24 P2p Edge

Gi1/0/26 Desg FWD 4 128.26 P2p Edge

Gi1/0/29 Desg FWD 4 128.29 P2p Edge

Gi1/0/30 Desg FWD 4 128.30 P2p Edge

Gi1/0/40 Desg FWD 4 128.40 P2p Edge

Gi1/0/41 Desg FWD 4 128.41 P2p Edge

Gi1/0/42 Desg FWD 4 128.42 P2p Edge

Gi1/0/47 Desg FWD 4 128.47 P2p Edge

Te1/1/4 Root FWD 2 128.52 P2p



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