Cisco Systems EA6500 Manual De Usuario

To enable PortFast BPDU filtering on a nontrunking port, perform this task:

This example shows how to enable PortFast BPDU filtering on a nontrunking port:

Router(config)# interface fastEthernet 4/4

Router(config-if)# spanning-tree bpdufilter enable 

Router(config-if)# ^Z

Router# show spanning-tree interface fastEthernet 4/4

Vlan             Role Sts Cost      Prio.Nbr Status

---------------- ---- --- --------- -------- --------------------------------

VLAN0010         Desg FWD 1000      160.196  Edge P2p 

Router# show spanning-tree interface fastEthernet 4/4 detail

Router# show spanning-tree interface fastEthernet 4/4 detail 

 Port 196 (FastEthernet4/4) of VLAN0010 is forwarding 

   Port path cost 1000, Port priority 160, Port Identifier 160.196.

   Designated root has priority 32768, address 00d0.00b8.140a

   Designated bridge has priority 32768, address 00d0.00b8.140a

   Designated port id is 160.196, designated path cost 0

   Timers:message age 0, forward delay 0, hold 0

   Number of transitions to forwarding state:1

   The port is in the portfast mode by portfast trunk configuration

   Link type is point-to-point by default

   Bpdu filter is enabled

   BPDU:sent 0, received 0

Router#

To enable BPDU Guard globally, perform this task: 

This example shows how to enable BPDU Guard:

Router# configure terminal 

Router(config)# spanning-tree portfast bpduguard 

Router(config)# end 

Router#

Router(config)# interface fastEthernet 4/4 

Selects the interface to configure. 

Router(config-if)# spanning-tree bpdufilter 

 

Enables BPDU filtering.

Router# show spanning-tree interface 

 

Verifies the configuration.

Router(config)# spanning-tree portfast bpduguard 

 

Router(config)# no spanning-tree portfast 

 default 

Enables BPDU Guard globally.

Disables BPDU Guard globally.

Router(config)# end 

Exits configuration mode.

Router# show spanning-tree summary totals 

Verifies the configuration.