Spanning Tree port roles pvst and rapid-pvst ‘show spanning-tree’

Spanning Tree switches

Spanning Tree switches

Working to get all the rapid-pvst port roles to show up in output of ‘show spanning-tree’ command, got that to work but noticed that these same roles show up in the pvst(ieee) output as well…

I believe this is just a cli output issue, as the states still process correctly (lis, lrn, fwd)

The diagram shows the 2 switches with a “loopback” cable (port g0/51 – g0/52) causing the BACKUP port role to show up as I did not have a real hub and needed the switch bpdu to return to itself to cause this BACKUP port role…

CLI OUTPUT from top switch NATIVE_4 and the ROOT switch NATIVE_2:

NATIVE_4#sh spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0021.1bf4.bd00
Cost 4
Port 1 (GigabitEthernet0/1)
Hello Time 2 sec Max Age 20 sec Forward Delay 4 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0022.0c4f.1c00
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300
Interface Role Sts Cost Prio.Nbr Type
—————- —- — ——— ——– ——————————–
Gi0/1 Root FWD 4 128.1 P2p
Gi0/48 Altn BLK 4 128.48 P2p
Gi0/51 Desg FWD 4 128.51 P2p
Gi0/52 Back BLK 4 128.52 P2p

NATIVE_2#sh spanning-tree
VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 32769
Address 0021.1bf4.bd00
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 4 sec
Bridge ID Priority 32769 (priority 32768 sys-id-ext 1)
Address 0021.1bf4.bd00
Hello Time 2 sec Max Age 20 sec Forward Delay 4 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
——————- —- — ——— ——– ——————————–
Gi0/1 Desg FWD 4 128.1 P2p
Gi0/48 Desg FWD 4 128.48 P2p

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s