Spanning-Tree Bpdufilter - Cisco Catalyst 2950 Command Reference Manual

spanning-tree bpdufilter

spanning-tree bpdufilter
Use the spanning-tree bpdufilter interface configuration command to prevent a port from sending or
receiving bridge protocol data units (BPDUs). Use the no form of this command to return to the default
setting.
Syntax Description
disable
enable
Defaults BPDU filtering is disabled.
Command Modes Interface configuration
Command History Release
12.1(9)EA1
Usage Guidelines You can enable the BPDU filtering feature when the switch is operating in the per-VLAN spanning-tree
plus (PVST+), rapid-PVST+, or in 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
Caution
spanning-tree loops.
You can globally enable BPDU filtering on all Port Fast-enabled ports 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.
Examples This example shows how to enable the BPDU filtering feature on a port:
Switch(config)# interface fastethernet0/1
Switch(config-if)# spanning-tree bpdufilter enable
You can verify your setting by entering the show running-config privileged EXEC command.
Catalyst 2950 and Catalyst 2955 Switch Command Reference
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spanning-tree bpdufilter {disable | enable}
no spanning-tree bpdufilter
Disable BPDU filtering on the specified interface.
Enable BPDU filtering on the specified interface.
Modification
This command was introduced.
Chapter 2 Catalyst 2950 and 2955 Cisco IOS Commands
0L-10102-01