HP Cisco MDS 9216 Cisco Nexus 5000 Series Command Reference Release 4.0(1a)N2( - Page 224

spanning-tree port type edge bpdufilter default Chapter 2 Ethernet Commands Send comments to [email protected] 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 Release 4.0(0)N1(1a) Modification This command was introduced. 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. 2-76 Cisco Nexus 5000 Series Command Reference OL-16599-01