Enabling Bpdu Guard; Enabling Uplinkfast - Cisco 7604 Configuration Manual

Enabling BPDU Guard

Enabling BPDU Guard
To enable BPDU Guard globally, perform this task:
Command
Step 1
Router(config)# spanning-tree portfast bpduguard
default
Router(config)# no spanning-tree portfast
bpduguard default
Step 2
Router(config)# end
Step 3
Router# show spanning-tree summary totals
This example shows how to enable BPDU Guard:
Router# configure terminal
Router(config)# spanning-tree portfast bpduguard
Router(config)# end
Router#
This example shows how to verify the configuration:
Router# show spanning-tree summary totals default
Root bridge for:VLAN0010
EtherChannel misconfiguration guard is enabled
Extended system ID
Portfast
PortFast BPDU Guard
Portfast BPDU Filter is enabled by default
Loopguard
UplinkFast
BackboneFast
Pathcost method used is long
Name
---------------------- -------- --------- -------- ---------- ----------
2 vlans
Router#

Enabling UplinkFast

UplinkFast increases the bridge priority to 49152 and adds 3000 to the STP port cost of all Layer 2 LAN
interfaces on the Cisco 7600 series router, decreasing the probability that the router will become the root
bridge. UplinkFast cannot be enabled on VLANs that have been configured for bridge priority. To enable
UplinkFast on a VLAN with bridge priority configured, restore the bridge priority on the VLAN to the
default value by entering a no spanning-tree vlan vlan_ID priority command in global configuration
mode.
When you enable UplinkFast, it affects all VLANs on the Cisco 7600 series router. You cannot configure
Note
UplinkFast on an individual VLAN.
To enable UplinkFast, perform this task:
Cisco 7600 Series Router Cisco IOS Software Configuration Guide, Release 12.2SX
21-12
Purpose
Enables BPDU Guard globally.
Disables BPDU Guard globally.
Exits configuration mode.
Verifies the configuration.
is disabled
is enabled by default
is disabled by default
is disabled by default
is disabled
is disabled
Blocking Listening Learning Forwarding STP Active
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Chapter 21 Configuring Optional STP Features
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