Specifications

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Cisco ME 3400 Ethernet Access Switch Command Reference

OL-9640-07

Chapter 2 Cisco ME 3400 Ethernet Access Switch Cisco IOS Commands

spanning-tree bpdufilter

Use the spanning-tree bpdufilter interface configuration command on a network node interface (NNI)

or enhanced network interface (ENI) with STP enabled to prevent the 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

Syntax Description

Defaults BPDU filtering is disabled.

Command Modes Interface configuration

Command History

Usage Guidelines Spanning Tree Protocol (STP) is not supported on user network interfaces (UNIs). You can configure

BPDU filtering only on NNIs or on ENIs on which STP has been enabled. To set a port as an NNI or

ENI, enter the port-type {nni | eni} interface configuration command. To enable STP on an ENI, enter

the spanning-tree interface configuration command.

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.

Caution Enabling BPDU filtering on an STP port 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 STP ports by using the spanning-tree

portfast bpdufilter default global configuration command.

You can use the spanning-tree bpdufilter interface configuration command on an STP port to override

the setting of the spanning-tree portfast bpdufilter default global configuration command.

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

Switch(config)# interface gigabitethernet0/1

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

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

disable Disable BPDU filtering on the specified STP port.

enable Enable BPDU filtering on the specified STP port.

Release Modification

12.2(25)EX This command was introduced.