Enabling Backbonefast - Cisco WS-SUP32-GE-3B - Supervisor Engine 32 Software Configuration Manual

Chapter 18 Configuring Optional STP Features
Router# configure terminal
Router(config)# spanning-tree uplinkfast
Router(config)# spanning-tree uplinkfast max-update-rate 400
Router(config)# exit
Router#
This example shows how to verify that UplinkFast is enabled:
Router# show spanning-tree uplinkfast
UplinkFast is enabled
Router#

Enabling BackboneFast

BackboneFast operates correctly only when enabled on all network devices in the network.
Note
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:
Command
Step 1
Router(config)# spanning-tree backbonefast
Router(config)# no spanning-tree backbonefast
Step 2
Router(config)# end
Step 3
Router# show spanning-tree vlan vlan_ID
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)
Number of RLQ request PDUs received (all VLANs)
Number of RLQ response PDUs received (all VLANs)
Number of RLQ request PDUs sent (all VLANs)
Number of RLQ response PDUs sent (all VLANs)
Router#
OL-11439-03
Catalyst Supervisor Engine 32 PISA Cisco IOS Software Configuration Guide, Release 12.2ZY
Purpose
Enables BackboneFast.
Disables BackboneFast.
Exits configuration mode.
Verifies that UplinkFast is enabled.
: 0
: 0
: 0
: 0
: 0
Enabling BackboneFast
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