Reference Guide

Parameters max-age seconds — Enter a maximum age value in seconds (6 to 40).
Default 20 seconds
Command Mode CONFIGURATION
Usage
Information
None
Example
OS10(config)# spanning-tree vlan 10 max-age 10
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 configured
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).
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