Enabling Loop Guard Globally - Cisco Nexus 7000 Series Configuration Manual

Enabling Loop Guard Globally

DETAILED STEPS
Command or Action
Step 1
switch# config t
Step 2
switch(config)# interface type slot/port
Step 3 Enter one of the following commands:
Option
spanning-tree
bpdufilter {enable |
disable}
no spanning-tree
bpdufilter
Step 4 switch(config-if)# exit
Step 5 switch# show spanning-tree summary interface type slot/port
detail
Step 6
switch(config)# copy running-config startup-config
This example shows how to explicitly enable BPDU Filtering on the Ethernet spanning tree edge port 1/4:
switch# config t
switch(config)# interface ethernet 1/4
switch(config-if)# spanning-tree bpdufilter enable
switch(config-if)# exit
switch(config)#
Enabling Loop Guard Globally
You can enable Loop Guard globally by default on all point-to-point spanning tree normal and network ports.
Loop Guard does not run on edge ports.
Loop Guard provides additional security in the bridge network. Loop Guard prevents alternate or root ports
from becoming the designated port because of a failure that could lead to a unidirectional link.
Entering the Loop Guard command for the specified interface overrides the global Loop Guard command.
Note
Cisco Nexus 7000 Series NX-OS Layer 2 Switching Configuration Guide, Release 5.x
196
Description
Enables or disables BPDU Filtering for the
specified spanning tree edge interface. By
default, BPDU Filtering is disabled.
Enables BPDU Filtering on the interface if
the interface is an operational spanning tree
edge port and if you enter the spanning-tree
port type edge bpdufilter default
command.
Configuring STP Extensions Using Cisco NX-OS
Purpose
Enters global configuration mode.
Specifies the interface to configure and enters
interface configuration mode.
Exits interface configuration mode.
(Optional)
Displays summary STP information.
(Optional)
Copies the running configuration to the startup
configuration.