Cisco Catalyst 4500 Series Command Reference Guide

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Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
spanning-tree bpdufilter
spanning-tree bpdufilter
To enable BPDU filtering on an interface, use the spanning-tree bpdufilter command. To return to the
default settings, use the no form of this command.
spanning-tree bpdufilter {enable | disable}
no spanning-tree bpdufilter
Syntax Description
Defaults Disabled
Command Modes Interface configuration mode
Command History
Usage Guidelines
Caution Use care when entering the spanning-tree bpdufilter enable command. Enabling BPDU filtering on an
interface is approximately equivalent to disabling the spanning tree for this interface. It is possible to
create bridging loops if this command is not correctly used.
When configuring Layer 2 protocol tunneling on all the service provider edge switches, you must enable
spanning-tree BPDU filtering on the 802.1Q tunnel ports by entering the spanning-tree bpdufilter
enable command.
BPDU filtering allows you to prevent a port from sending and receiving BPDUs. The configuration is
applicable to the whole interface, whether it is trunking or not. This command has three states:
• spanning-tree bpdufilter enable—This state unconditionally enables the BPDU filter feature on
the interface.
• spanning-tree bpdufilter disable—This state unconditionally disables the BPDU filter feature on
the interface.
• no spanning-tree bpdufilter—This state enables the BPDU filter feature on the interface if the
interface is in operational PortFast state and if the spanning-tree portfast bpdufilter default
command is configured.
enable Enables BPDU filtering on this interface.
disable Disables BPDU filtering on this interface.
Release Modification
12.1(12c)EW Support for this command was introduced on the Catalyst 4500 series switch..

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E