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Cisco HWIC-4ESW User Manual page 87

Etherswitch interface cards
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Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards
Disabling the Spanning Tree on an Interface
When a loop-free path exists between any two switched subnetworks, you can prevent BPDUs generated
in one switching subnetwork from impacting devices in the other switching subnetwork, yet still permit
switching throughout the network as a whole. For example, when switched LAN subnetworks are
separated by a WAN, BPDUs can be prevented from traveling across the WAN link.
Follow the steps below to disable spanning tree on an interface.
SUMMARY STEPS
1.
2.
3.
4.
5.
6.
7.
DETAILED STEPS
Command
Step 1
enable
Example:
Router> enable
Step 2
configure terminal
Example:
Router# configure terminal
Step 3
interface interface-id
Example:
Router(config)# interface 0/3/1
Step 4
bridge-group bridge-group
spanning-disabled
Example:
Router(config-if)# bridge 100
spanning-disabled
Step 5
end
Example:
Router(config-if)# end
enable
configure terminal
interface interface-id
bridge-group bridge-group spanning-disabled
end
show running-config
copy running-config startup-config
Purpose
Enables privileged EXEC mode.
Enter your password if prompted.
•
Enters global configuration mode.
Enters interface configuration mode and specifies the interface to set
the priority.
Disables spanning tree on the interface.
For bridge-group, specify the bridge group number. The range is 1
•
to 255.
Returns to privileged EXEC mode.
How to Configure EtherSwitch HWICs
Book Title
87
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