ES-3124 User’s Guide

36.3 Enabling STP

Use the spanning-treeor the mrstp commands to enable and configure STP on the switch. The difference between the commands is that spanning-treeonly allows you to set up one spanning tree configuration and the mrstp command allows you to set up multiple ones.

Syntax:

spanning-tree

spanning-tree priority <0-61440>

spanning-tree hello-time <1-10> maximum-age <6-40> forward- delay <4-30>

spanning-tree <port-list> path-cost <1-65535> spanning-tree <port-list> priority <0-255>

and

mrstp <treeIndex> <cr>

mrstp <treeIndex> priority <0-61440>

mrstp <treeIndex> hello-time <1-10> maximum-age <6-40> forward- delay <4-30>

mrstp interface <port-list> <cr>

mrstp interface <port-list> path-cost <1-65535> mrstp interface <port-list> priority <0-255> mrstp interface <port-list> treeIndex <1-2>

where

 

spanning-tree

= Enables STP on the switch.

mrstp <treeIndex>

Enables a specific tree configuration.

priority <0-61440>

= Specifies the bridge priority for the switch. The lower the

 

numeric value you assign, the higher the priority for this bridge.

 

Bridge priority is used in determining the root switch, root port

 

and designated port. The switch with the highest priority

 

(lowest numeric value) becomes the STP root switch. If all

 

switches have the same priority, the switch with the lowest

 

MAC address will then become the root switch.

 

Bridge Priority determines the root bridge, which in turn

 

determines Hello Time, Max Age and Forwarding Delay.

hello-time <1-10>

= Specifies the time interval in seconds between BPDU (Bridge

 

Protocol Data Units) configuration message generations by the

 

root switch.

Chapter 36 Configuration Mode Commands

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