Spanning-Tree Bpdufilter - Cisco Catalyst 3560-X Command Reference Manual

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Chapter 2 Catalyst 3750-X and 3560-X Cisco IOS Commands

spanning-tree bpdufilter

Syntax Description

Command Modes

Command History

Usage Guidelines

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Use the spanning-tree bpdufilter interface configuration command on the switch stack or on a

standalone switch to prevent an interface from sending or receiving bridge protocol data units (BPDUs).

Use the no form of this command to return to the default setting.

spanning-tree bpdufilter {disable | enable}

no spanning-tree bpdufilter

Disable BPDU filtering on the specified interface.

Enable BPDU filtering on the specified interface.

BPDU filtering is disabled.

Interface configuration

You can enable the BPDU filtering feature when the switch is operating in the per-VLAN spanning-tree

plus (PVST+), rapid-PVST+, or the multiple spanning-tree (MST) mode.

Enabling BPDU filtering on an interface is the same as disabling spanning tree on it and can result in

spanning-tree loops.

You can globally enable BPDU filtering on all Port Fast-enabled interfaces by using the spanning-tree

portfast bpdufilter default global configuration command.

You can use the spanning-tree bpdufilter interface configuration command to override the setting of

the spanning-tree portfast bpdufilter default global configuration command.

This example shows how to enable the BPDU filtering feature on a port:

Switch(config)# interface gigabitethernet2/0/1

Switch(config-if)# spanning-tree bpdufilter enable

You can verify your setting by entering the show running-config privileged EXEC command.

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Modification

This command was introduced.

Catalyst 3750-X and 3560-X Switch Command Reference

spanning-tree bpdufilter

Catalyst 3750-x