C613-50170-01 Rev B
Command Reference for x510 Series
662
AlliedWare Plus™ Operating System - Version 5.4.7-1.x
S
PANNING
T
REE
C
OMMANDS
SPANNING
-
TREE
BPDU
spanning-tree bpdu
Overview
Use this command to configure BPDU (Bridge Protocol Data Unit) discarding or
forwarding, when STP is disabled on the switch. This may be needed for correct STP
operation in complex networks.
There is no
no
variant for this command. Instead, apply the
discard
parameter to
reset it back to the default then re-enable STP with the command
.
Syntax
spanning-tree bpdu
{discard|forward|forward-untagged-vlan|forward-vlan}
Default
The discard parameter is enabled by default.
Mode
Global Configuration
Usage
This command enables the switch to forward unsupported BPDUs with an
unsupported Spanning Tree Protocol, such as proprietary STP protocols with
unsupported BPDUs, by forwarding BDPU (Bridge Protocol Data Unit) frames
unchanged through the switch.
You must disable RSTP with the
no spanning-tree rstp enable
command before
you can use this command.
When you want to revert to default behavior on the switch, issue a
spanning-tree
bdpu discard
command and re-enable Spanning Tree with a
spanning-tree rstp
enable
command.
Parameter
Description
bpdu
A port that has BPDU filtering enabled will not transmit any BPDUs
and will ignore any BPDUs received. This port type has one of the
following parameters (in Global Configuration mode):
discard
Discards all ingress STP BPDU frames.
forward
Forwards any ingress STP BPDU packets to all ports,
regardless of any VLAN membership.
forward-
untagged-
vlan
Forwards any ingress STP BPDU frames to all ports
that are untagged members of the ingress port’s
native VLAN.
forward-
vlan
Forwards any ingress STP BPDU frames to all ports
that are tagged members of the ingress port’s native
VLAN.