Spanning-tree portfast bpdu-guard (switch) – Allied Telesis AT-DC2552XS User Manual
Page 379
AT-DC2552SX Switch Command Line Interface User’s Guide
379
SPANNING-TREE PORTFAST BPDU-GUARD (SWITCH)
Syntax
spanning-tree portfast bpdu-guard
Parameters
None
Mode
Global Configuration mode
Description
Use this command to enable the BPDU guard feature on the switch, which
disables the designated edge ports when these ports receive BPDUs. By
default, the BPDU guard feature is disabled.
Note
This command is applicable only when RSTP or MSTP is enabled.
When MSTP is enabled, this command sets the value to the CIST
(instance 0).
To enable the disabled edge ports manually, use the NO SHUTDOWN
command. See “NO SHUTDOWN” on page 254. When the timer for the
BPDU guard feature is enabled using the SPANNING-TREE
ERRDISABLE-TIMEOUT ENABLE command, the switch reactivates once
disabled ports automatically. See “SPANNING-TREE ERRDISABLE-
TIMEOUT ENABLE” on page 362. The time interval that ports remain
disabled is set with the SPANNING-TREE ERRDISABLE-TIMEOUT
command. See “SPANNING-TREE ERRDISABLE-TIMEOUT INTERVAL”
on page 363.
To enable the BPDU guard feature on each port on the switch, use the
SPANNING-TREE PORTFAST BPDU-GUARD (PORT) command. The
setting for the BPDU guard feature on the port overrides the setting for the
BPDU guard feature on the switch. See “SPANNING-TREE PORTFAST
BPDU-GUARD (PORT)” on page 381.
To disable the BPDU guard feature, use the NO SPANNING-TREE
PORTFAST BPDU-GUARD command.
Confirmation Command