Cisco Catalyst 4500 Series, Software Configuration Manual

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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 23 Configuring STP and MST
Configuring STP
Note The show spanning-tree command displays only information for ports with an active link (green light
is on). If there is no port with an active link, you can issue a show running-config command to confirm
the configuration.
Configuring the Bridge Priority of a VLAN
Note
Exercise care when configuring the bridge priority of a VLAN. In most cases, 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 spanning tree bridge priority of a VLAN, perform this task:
This example shows how to configure the bridge priority of VLAN 200 to 33,792:
Switch# configure terminal
Switch(config)# spanning-tree vlan 200 priority 33792
Switch(config)# end
Switch#
This example shows how to verify the configuration:
Switch# show spanning-tree vlan 200 bridge brief
Hello Max Fwd
Vlan Bridge ID Time Age Delay Protocol
---------------- -------------------- ---- ---- ----- --------
VLAN200 33792 0050.3e8d.64c8 2 20 15 ieee
Switch#
Configuring the Hello Time
Note
Exercise care when configuring the hello time. In most cases, we recommend that you use the
spanning-tree vlan vlan_ID root primary and the spanning-tree vlan vlan_ID root secondary
commands to modify the hello time.
Command Purpose
Step 1
Switch(config)# [ no ] spanning-tree vlan vlan_ID
priority bridge_priority
Configures the bridge priority of a VLAN. The
bridge_priority value can be from 1 to 65,534.
Use the no keyword to restore the defaults.
Step 2
Switch(config)# end
Exits configuration mode.
Step 3
Switch# show spanning-tree vlan vlan_ID bridge
[ brief ]
Verifies the configuration.