Spanning-Tree Max-Hops (Mstp); Spanning-Tree Enable - Allied Telesis SwitchBlade x908 Series Software Reference Manual

Spanning Tree Commands

spanning-tree max-hops (MSTP)

Use this command to specify the maximum allowed hops for a BPDU in an MST region. This
parameter is used by all the instances of the MST region. To restore the default value, use the
no parameter with this command.
Use this command for MSTP only.
Syntax
spanning-tree max-hops <hop-count>
no spanning-tree max-hops
Parameter
<hop-count>
Global Configuration mode
Mode
The default max-hops in a MST region is 20.
Default
Specifying the max hops for a BPDU prevents the messages from looping indefinitely in the
Usage
network. The hop count is decremented by each receiving port. When a switch receives an
MST BPDU that has a hop count of zero, it discards the BPDU.
Examples
awplus(config)#

spanning-tree enable

Use this command to disable or re-enable the specified spanning tree protocol on the device.
Note that this must be the spanning tree protocol as configured by the
command.
Syntax
spanning-tree {stp|rstp|mstp} enable
no spanning-tree {stp|rstp|mstp} enable
RSTP is enabled by default.
Default
With no configuration, the device will have spanning tree enabled, and the spanning tree mode
Usage
will be set to RSTP.
The no variant of this command will disable the selected spanning tree mode and place all ports
in the forwarding state.
Global Configuration mode
Mode
To disable RSTP on the device, use the following commands:
Examples
awplus(config)#
19.34
Description
Maximum hops the BPDU will be valid for.
awplus# configure terminal
spanning-tree max-hops 25
awplus# configure terminal
no spanning-tree rstp enable
Software Reference for SwitchBlade® x908, x900 and x600 Series Switches
TM
AlliedWare Plus Operating System - Software Version 5.3.1
spanning-tree mode
C613-50007-01 REV B