Configuring The Bridge Priority Of A Vlan - Cisco WS-SUP32-GE-3B - Supervisor Engine 32 Software Configuration Manual

Chapter 17 Configuring STP and MST
VLAN0007
VLAN0008
VLAN0009
VLAN0010
Router#
This example shows how to configure the port priority at an individual port VLAN cost for VLAN 200:
Router# configure terminal
Enter configuration commands, one per line.
Router(config)# interface gigabitethernet 1/4
Router(config-if)# spanning-tree vlan 200 cost 2000
Router(config-if)# end
Router#
This example shows how to verify the configuration:
Router# show spanning-tree vlan 200 interface gigabitethernet 1/4
Interface
---------------- ---- --- --------- -------- --------------------------------
Gi1/4
In the following output other VLANs (VLAN 1 for example) have not been affected by this
Note
configuration.
Router# show spanning-tree vlan 1 interface gigabitethernet 1/4
Interface
---------------- ---- --- --------- -------- --------------------------------
Gi1/4
Router#
The show spanning-tree command only displays information for ports that are in link-up operative state
Note
and are appropriately configured for DTP. If these conditions are not met, you can enter a show
running-config command to confirm the configuration.

Configuring the Bridge Priority of a VLAN

Note Be careful when using this command. For most situations, we recommend that you enter the
spanning-tree vlan vlan_ID root primary and the spanning-tree vlan vlan_ID root secondary
commands to modify the bridge priority.
To configure the STP bridge priority of a VLAN, perform this task:
Command
Step 1
Router(config)# spanning-tree vlan vlan_ID
priority {0 | 4096 | 8192 | 12288 | 16384 | 20480
| 24576 | 28672 | 32768 | 36864 | 40960 | 45056 |
49152 | 53248 | 57344 | 61440}
Router(config)# no spanning-tree vlan vlan_ID
priority
OL-11439-03
Back BLK 1000 160.196
Back BLK 1000 160.196
Back BLK 1000 160.196
Back BLK 1000 160.196
Role Sts Cost Prio.Nbr Status
Desg FWD 2000 64.196
Role Sts Cost Prio.Nbr Status
Back BLK 1000 160.196
Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY
P2p
P2p
P2p
P2p
End with CNTL/Z.
P2p
P2p
Purpose
Configures the bridge priority of a VLAN when the
extended system ID is enabled. The vlan_ID value can be
1 through 4094, except reserved VLANs (see
on page 12-2).
Reverts to the default bridge priority value.
Configuring STP
Table 12-1
17-33