Spanning-Tree Bpdufilter - Cisco Catalyst 3120 Command Reference Manual

spanning-tree bpdufilter

spanning-tree bpdufilter
Use the spanning-tree bpdufilter interface configuration command on the switch stack or on a
standalone switch to prevent an interface 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
12.2(40)EX
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 the multiple spanning-tree (MST) mode.
Caution Enabling BPDU filtering on an interface 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 interfaces 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 gigabitethernet2/0/1
Switch(config-if)# spanning-tree bpdufilter enable
You can verify your setting by entering the show running-config privileged EXEC command.
Cisco Catalyst Blade Switch 3120 for HP Command Reference
2-622
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 Cisco Catalyst Blade Switch 3120 for HP Cisco IOS Commands
OL-12248-01