
Spanning Tree Commands
©2008 Allied Telesis Inc. All rights reserved.
Software Version 5.2.1
AlliedWare Plus
TM
Operating System Software Reference C613-50003-00 REV E
19.39
spanning-tree portfast bpdu-guard
Use this command to enable the BPDU (Bridge Protocol Data Unit) Guard feature on a switch.
Use this command for RSTP, or MSTP.
Use the
no
parameter with this command to disable the BPDU Guard feature on a switch
Syntax
spanning-tree portfast bpdu-guard
no spanning-tree portfast bpdu-guard
Mode
Configure or Interface mode
Usage
When the BPDU Guard feature is set for a switch, all portfast-enabled ports of the switch that
have bpdu-guard set to default shut down the port on receiving a BPDU. In this case, the
BPDU is not processed. You can either bring the port back up manually by using the
no
shutdown
command, or configure the errdisable-timeout feature to enable the port after the
specified time interval.
Use the
show spanning-tree
command to display the switch and port configurations for
the BPDU Guard feature. It shows both the administratively configured and currently running
values of bpdu-guard.
Example
Related Commands
spanning-tree errdisable-timeout enable
spanning-tree errdisable-timeout interval
show spanning-tree
awplus#
configure terminal
awplus(config)#
spanning-tree portfast bpdu-guard
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