Cisco Systems N3KC3048TP1GE Enabling BPDU Guard Globally, port type network, Before You Begin

Configuring STP Extensions

Configuring STP Extensions

Note A port connected to a host that is configured as a network port automatically moves into the blocking state.

Before You Begin

Ensure that STP is configured.

Ensure that the interface is connected to switches or routers.

Procedure

	Command or Action	Purpose
Step 1	switch# configure terminal	Enters configuration mode.
Step 2	switch(config)# interface type	Specifies the interface to configure, and enters the interface
	slot/port	configuration mode. The interface can be a physical
		Ethernet port.
Step 3	switch(config-if)# spanning-tree	Configures the specified interfaces to be spanning network
	port type network	ports. If you enable Bridge Assurance, it automatically
		runs on network ports. By default, spanning tree ports are
		normal port types.

This example shows how to configure the Ethernet interface 1/4 to be a spanning tree network port:

switch# configure terminal switch(config)# interface ethernet 1/4 switch(config-if)# spanning-tree port type network

Enabling BPDU Guard Globally

You can enable BPDU Guard globally by default. In this condition, the system shuts down an edge port that receives a BPDU.

Note We recommend that you enable BPDU Guard on all edge ports.

Before You Begin

Ensure that STP is configured.

Ensure that you have configured some spanning tree edge ports.

	Cisco Nexus 3000 NX-OS Layer 2 Switching Configuration Guide, Release 5.0(3)U3(1)
120	OL-26590-01