Users Guide

Default Not congured
Command Mode CONFIGURATION
Usage Information The RPVST+ protocol determines the root bridge. Assign one bridge a lower priority to increase the probability of 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, from 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 the primary or secondary root bridge.
Syntax
spanning-tree vlan vlan-id root {primary | secondary}
Parameters
• vlan-id — Enter a VLAN ID number, from 1 to 4093.
• root — Designate the bridge as the primary or secondary root.
• primary — Designate the bridge as the primary or root bridge.
• secondary — Designate the bridge as the secondary or secondary root bridge.
Default Not congured
Command Mode CONFIGURATION
Usage Information None
Example
OS10(config)# spanning-tree vlan 1 root primary
Supported Releases 10.2.0E or later
Rapid Spanning-Tree Protocol
Rapid Spanning-Tree Protocol (RSTP) is similar to STP, but provides faster convergence and interoperability with devices congured with
STP and MSTP. RSTP is disabled by default. All enabled interfaces in L2 mode automatically add to the RSTP topology.
Conguring RSTP is a two-step process:
Layer 2
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