Cisco 7604 User Manual

21-14
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
OL-4266-08
Chapter 21 Configuring Optional STP Features
Enabling EtherChannel Guard
Router(config)# spanning-tree backbonefast
Router(config)# end
Router#
This example shows how to verify that BackboneFast is enabled:
Router# show spanning-tree backbonefast
BackboneFast is enabled
BackboneFast statistics
-----------------------
Number of transition via backboneFast (all VLANs) : 0
Number of inferior BPDUs received (all VLANs) : 0
Number of RLQ request PDUs received (all VLANs) : 0
Number of RLQ response PDUs received (all VLANs) : 0
Number of RLQ request PDUs sent (all VLANs) : 0
Number of RLQ response PDUs sent (all VLANs) : 0
Router#
Enabling EtherChannel Guard
To enable EtherChannel guard, perform this task:
This example shows how to enable EtherChannel guard:
Router# configure terminal
Router(config)# spanning-tree etherchannel guard misconfig
Router(config)# end
Router#
This example shows how to verify the configuration:
Router# show spanning-tree summary | include EtherChannel
EtherChannel misconfiguration guard is enabled
To display the interfaces that are in the errdisable state, enter the show interface status err-disable
command.
After the misconfiguration has been cleared, interfaces in the errdisable state might automatically
recover. To manually return a port to service, enter a shutdown and then a no shutdown command for
the interface.
Enabling Root Guard
To enable root guard, perform this task:
Command Purpose
Step 1
Router(config)# spanning-tree etherchannel guard
misconfig
Enables EtherChannel guard.
Router(config)# no spanning-tree etherchannel
guard misconfig
Disables EtherChannel guard.
Step 2
Router(config)# end
Exits configuration mode.
Step 3
Router# show spanning-tree summary | include
EtherChannel
Verifies that EtherChannel guard is enabled.

Cisco 7604 Specifications

General

Brand	Cisco
Model	7604
Category	Network Router
Language	English