Cisco MWR 2941 Installation Manual Page 638

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Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Command Reference, Cisco IOS Release 15.1(3)MR
OL-26895-01
Chapter Cisco MWR 2941 Router Command Reference, Release 15.1(3)MR
spanning-tree bpdufilter
spanning-tree bpdufilter
To enable bridge protocol data unit (BPDU) filtering on the interface, use the spanning-tree bpdufilter
command in interface configuration mode. To return to the default settings, use the no form of this
command.
spanning-tree bpdufilter {enable | disable}
no spanning-tree bpdufilter
Syntax Description
Command Default The setting that is already configured when you enter the spanning-tree portfast bpdufilter default
command.
Command Modes Interface configuration (config-if)
Command History
Usage Guidelines
Caution Be careful when you enter the spanning-tree bpdufilter enable command. Enabling BPDU filtering on
an interface is similar to disabling the spanning tree for this interface. If you do not use this command
correctly, you might create bridging loops.
Entering the spanning-tree bpdufilter enable command to enable BPDU filtering overrides the
PortFast configuration.
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 prevents 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—Unconditionally enables BPDU filtering on the interface.
spanning-tree bpdufilter disable—Unconditionally disables BPDU filtering on the interface.
enable Enables BPDU filtering on this interface.
disable Disables BPDU filtering on this interface.
Release Modification
12.2(14)SX Support for this command was introduced on the Supervisor Engine 720.
12.2(17d)SXB Support for this command on the Supervisor Engine 2 was extended to
Release 12.2(17d)SXB.
12.2(33)SRA This command was integrated into Cisco IOS Release 12.2(33)SRA.
15.0(1)MR This command was integrated into 15.0(1)MR.
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