Allied Telesis IE340 Series User Manual

C613-50631-01 Rev A Command Reference for IE340 Series 703
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
SPANNING TREE COMMANDS
INSTANCE
PRIORITY (MSTP)
instance priority (MSTP)
Overview Use this command to set the priority for this device to become the root bridge for
the specified MSTI (Multiple Spanning Tree Instance).
Use this command for MSTP only.
Use the no variant of this command to restore the root bridge priority of the device
for the instance to the default.
Syntax
instance <instance-id> priority <priority>
no instance <instance-id> priority
Default The default priority value for all instances is 32768.
Mode MST Configuration
Usage notes MSTP lets you distribute traffic more efficiently across a network by blocking
different links for different VLANs. You do this by making different devices into the
root bridge for each MSTP instance, so that each instance blocks a different link.
If all devices have the same root bridge priority for the instance, MSTP selects the
device with the lowest MAC address to be the root bridge. Give the device a higher
priority for becoming the root bridge for a particular instance by assigning it a
lower priority number, or vice versa.
Examples To set the root bridge priority for MSTP instance 2 to be the highest (0), so that it
will be the root bridge for this instance when available, use the commands:
awplus# configure terminal
awplus(config)# spanning-tree mst configuration
awplus(config-mst)# instance 2 priority 0
To reset the root bridge priority for instance 2 to the default (32768), use the
commands:
awplus# configure terminal
awplus(config)# spanning-tree mst configuration
awplus(config-mst)# no instance 2 priority
Parameter Description
<instance-id> Specify an MSTP instance in the range 1-15.
<priority> Specify the root bridge priority for the device for the MSTI in the
range <0-61440>. Note that a lower priority number indicates a
greater likelihood of the device becoming the root bridge. The
priority values can be set only in increments of 4096. If you
specify a number that is not a multiple of 4096, it will be rounded
down. The default priority is 32768.

Allied Telesis IE340 Series Specifications

General

Brand	Allied Telesis
Model	IE340 Series
Category	Switch
Language	English