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 port type edge bpdufilter default
spanning-tree port type edge bpdufilter default
To enable BPDU Filtering by default on all spanning tree edge ports, use the spanning-tree port type
edge bpdufilter default command. To disable BPDU Filtering by default on all edge ports, use the no
form of this command.
spanning-tree port type edge bpdufilter default
no spanning-tree port type edge bpdufilter default
Syntax Description This command has no keywords or arguments.
Command Default Disabled.
Command Modes Configuration mode
Command History
Usage Guidelines To enable BPDU Filtering by default, you must do the following:
• Configure the interface as a spanning tree edge port, using the spanning-tree port type edge or the
spanning-tree port type edge default command.
• Enable BPDU Filtering.
Use this command to enable BPDU Filtering globally on all spanning tree edge ports. BPDU Filtering
prevents a port from sending or receiving any BPDUs.
Caution Be cautious when using this command; incorrect usage can cause bridging loops.
You can override the global effects of this spanning-tree port type edge bpdufilter default command
by configuring BPDU Filtering at the interface level. See the spanning-tree bpdufilter command for
complete information on using this feature at the interface level.
Note The BPDU Filtering feature’s functionality is different when you enable it on a per-port basis or globally.
When enabled globally, BPDU Filtering is applied only on ports that are operational spanning tree edge
ports. Ports send a few BPDUs at a linkup before they effectively filter outbound BPDUs. If a BPDU is
received on an edge port, that port immediately becomes a normal spanning tree port with all the normal
transitions and BPDU Filtering is disabled. When enabled locally on a port, BPDU Filtering prevents the
switch from receiving or sending BPDUs on this port.
Release Modification
4.0(0)N1(1a) This command was introduced.