Cisco Nexus 5000 Series Command Reference Release 4.0(1a)N2(1) (OL-16599-01, March 2009)

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Cisco Nexus 5000 Series Command Reference
OL-16599-01
Chapter 2 Ethernet Commands
spanning-tree bpdufilter
spanning-tree bpdufilter
To enable BPDU Filtering on the interface, use the spanning-tree bpdufilter command. 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 port type edge bpdufilter
default command.
Command Modes Interface configuration mode
Command History
Usage Guidelines Entering the spanning-tree bpdufilter enable command to enable BPDU Filtering overrides the
spanning tree edge port configuration. That port then returns to the normal spanning tree port type and
moves through the normal spanning tree transitions.
Caution Be careful when you enter the spanning-tree bpdufilter enable command on specified interfaces.
Explicitly configuring BPDU Filtering on a port this is not connected to a host can cause a bridging loop
because the port will ignore any BPDU that it receives, and the port moves to the STP forwarding state.
Use the spanning-tree port type edge bpdufilter default command to enable BPDU Filtering on all
spanning tree edge ports.
Examples This example shows how to explicitly enable BPDU Filtering on the Ethernet spanning tree edge port
1/4:
switch (config)# interface ethernet 1/4
switch(config-if)# spanning-tree bpdufilter enable
Related Commands
enable Enables BPDU Filtering on this interface.
disable Disables BPDU Filtering on this interface.
Release Modification
4.0(0)N1(1a) This command was introduced.
Command Description
show spanning-tree
summary
Displays information about the spanning tree state.