Spanning-Tree Bpdufilter - Cisco Catalyst 2950 Command Reference Manual

Chapter 2 Cisco IOS Commands

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
(PVST) or the multiple spanning-tree (MST) mode. The MST mode is available only if you have the
enhanced software image (EI) installed on your switch.
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.
78-11381-05
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 first introduced.
Catalyst 2950 Desktop Switch Command Reference
spanning-tree bpdufilter
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