Administrator Guide

Layer 2 Switching Commands 786
If the value configured is not among the specified values, it will be rounded
off to the nearest valid value.
Command Modes
Global Configuration mode
User Guidelines
This command can be configured even if the switch is configured for
MST(RSTP) mode. It is only used when the switch is configured for STP-PV
or RSTP-PV modes.
The root bridge for a VLAN should be carefully selected to provide optimal
paths for traffic through the network. Generally, this means selecting a switch
that is well-connected with other switches in the network.
Configuration of the bridge priority is given preference over configuration of
the root primary or root secondary configuration, which is given preference
over the configuration of DirectLink Rapid Convergence.
Example
This example configures a switch to be the spanning tree root bridge for
VLANs 12, 13, 24, 25, and 26. This presumes other switches in the network
utilize the default bridge priority configuration.
console(config)#spanning-tree vlan 12,13,24-26 priority 8192