Cisco Systems N3KC3064TFAL3 Enabling BPDU Guard on Specified Interfaces, edge bpduguard default

Configuring STP Extensions

Configuring STP Extensions

Procedure

	Command or Action	Purpose
Step 1	switch# configure terminal	Enters configuration mode.
Step 2	switch(config)# spanning-tree port type	Enables BPDU Guard by default on all spanning
	edge bpduguard default	tree edge ports. By default, global BPDU Guard
		is disabled.

This example shows how to enable BPDU Guard on all spanning tree edge ports:

switch# configure terminal

switch(config)# spanning-tree port type edge bpduguard default

Enabling BPDU Guard on Specified Interfaces

You can enable BPDU Guard on specified interfaces. Enabling BPDU Guard shuts down the port if it receives a BPDU.

You can configure BPDU Guard on specified interfaces as follows:

•spanning-tree bpduguard enable—Unconditionally enables BPDU Guard on the interface.

•spanning-tree bpduguard disable—Unconditionally disables BPDU Guard on the interface.

•no spanning-treebpduguard—Enables BPDU Guard on the interface if it is an operational edge port and if the spanning-tree port type edge bpduguard default command is configured.

Before You Begin

Ensure that STP is configured.

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
	slot/port	interface configuration mode.
Step 3	switch(config-if)# spanning-tree	Enables or disables BPDU Guard for the specified
	bpduguard {enable disable}	spanning tree edge interface. By default, BPDU Guard is
		disabled on physical Ethernet interfaces.
Step 4	switch(config-if)# no spanning-tree	(Optional)
	bpduguard	Disables BPDU Guard on the interface.
		Note	Enables BPDU Guard on the interface if it is an
			operational edge port and if you enter the

spanning-tree port type edge bpduguard default command.

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

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