Spanning-Tree Bpdufilter - Cisco catalyst 3750 Command Reference Manual

spanning-tree bpdufilter

spanning-tree bpdufilter
Use the spanning-tree bpdufilter interface configuration command 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
12.1(11)AX
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.
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 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.
Catalyst 3750 Switch Command Reference
2-760
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 3750 Switch Cisco IOS Commands
OL-8552-07