Spanning-Tree Vlan Priority Command on CISCO Router/Switch

Command

Spanning-Tree Vlan Priority

Use

This command is used to change the VLAN priority for spanning-tree.

Syntax

Switch(config)#spanning-tree vlan priority <#>

Example

In the below example we will configure SW2’s priority of Vlan 1 to be 4096.

SW1(config)#spanning vlan 1 priority 4096

Notice the priority is now 4096 and the switch is now is root.

SW1(config)#do sh spanning vlan 1

VLAN0001
Spanning tree enabled protocol ieee
Root ID Priority 4097
Address 0012.00cb.6c80
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec

Bridge ID Priority 4097 (priority 4096 sys-id-ext 1)
Address 0012.00cb.6c80
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300

Interface Role Sts Cost Prio.Nbr Type
—————- —- — ——— ——– ——————————–
Fa0/11 Desg FWD 100 128.11 Shr
Fa0/14 Desg FWD 19 128.14 P2p
Fa0/19 Desg FWD 19 128.19 P2p
Fa0/20 Desg FWD 19 128.20 P2p
Fa0/21 Desg FWD 19 128.21 P2p
Fa0/22 Desg FWD 19 128.22 P2p
Fa0/23 Desg FWD 19 128.23 P2p
Fa0/24 Desg FWD 19 128.24 P2p
–More–

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