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3 enabling stp – ZyXEL Communications GS-4012F/4024 User Manual

Page 302

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GS-4012F/4024 User’s Guide

Chapter 44 Configuration Mode Commands

301

44.3 Enabling STP

Use the

spanning-tree

or the

mrstp

commands to enable and configure STP on the switch.

The difference between the commands is that

spanning-tree

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

and

mrstp
mrstp priority <0-61440>
mrstp hello-time <1-10> maximum-age <6-40> forward-delay
-> <4-30>
mrstp interface
mrstp interface path-cost <1-65535>
mrstp interface priority <0-255>
mrstp interface treeIndex <1-4>

where

spanning-tree

=

Enables STP on the switch.

mrstp

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.