Reference Guide

Supported Releases 10.2.0E or later
spanning-tree vlan priority
Sets the priority value for RPVST+.
Syntax
spanning-tree vlan vlan-id priority priority value
Parameters priority priority value — Enter a bridge-priority value in increments of 4096 (0 to 61440). Valid priority
values are: 0, 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152, 53248, 57344,
and 61440. All other values are rejected.
Default Not congured
Command Mode CONFIGURATION
Usage Information The RPVST+ protocol determines the root bridge but you can assign one bridge a lower priority to increase the
probability it being the root bridge. A lower priority value increases the probability of the bridge becoming a
root bridge.
Example
OS10(config)# spanning-tree vlan 10 priority 0
Supported Releases 10.2.0E or later
spanning-tree vlan priority (Interface)
Sets an interface priority when two bridges compete for position as the root bridge.
Syntax
spanning-tree vlan vlan-id priority value
Parameters value — Enter a priority value in the increments of 16 (0 to 240).
Default 128
Command Mode INTERFACE
Usage Information Breaks the tie between the two bridges which compete for root bridge.
Example
OS10(conf-if-eth1/1/4)# spanning-tree vlan 10 priority 16
Supported Releases 10.2.0E or later
spanning-tree vlan root
Designates a device as primary or secondary root bridge.
Syntax
spanning-tree vlan vlan-id root {primary | secondary}
Parameters
• vlan-id — Enter a VLAN ID number (1 to 4093).
• root — Designate the bridge as primary or secondary root.
• primary — Designate the bridge as primary or root bridge.
• secondary — Designate the bridge as secondary or secondary root bridge.
Default Not congured
Command Mode CONFIGURATION
Layer 2 225