Cisco 7609 User Manual

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Cisco 7600 Series Router Cisco IOS Software Configuration Guide—12.1E
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Chapter 16 Configuring Optional STP Features
Enabling BackboneFast
This example shows how to verify that UplinkFast is enabled:
Router# show spanning-tree uplinkfast
UplinkFast is enabled
Router#
Enabling BackboneFast
Note BackboneFast operates correctly only when enabled on all network devices in the network.
BackboneFast is not supported on Token Ring VLANs. This feature is supported for use with third-party
network devices.
To enable BackboneFast, perform this task:
This example shows how to enable BackboneFast:
Router# configure terminal
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#
Command Purpose
Step 1
Router(config)# spanning-tree backbonefast
Enables BackboneFast.
Router(config)# no spanning-tree backbonefast
Disables BackboneFast.
Step 2
Router(config)# end
Exits configuration mode.
Step 3
Router# show spanning-tree vlan vlan_ID
Verifies that UplinkFast is enabled.

Cisco 7609 Specifications

General

Chassis Slots	9
Switch Fabric Capacity	720 Gbps
Power Supply Options	AC or DC
Product Type	Router
Form Factor	Rack-mountable
Supported Line Cards	Various Cisco 7600 Series line cards
Operating System	Cisco IOS
Management	CLI, SNMP
Forwarding Performance	400 Mpps
Maximum Power Consumption	4000 Watts
Redundancy	Yes
Interfaces/Ports	Various, depending on line cards installed