Cisco Catalyst 3550

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Catalyst 3550 Multilayer Switch Command Reference
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Chapter 2 Catalyst 3550 Switch Cisco IOS Commands
spanning-tree portfast (interface configuration)
Examples This example shows how to enable the Port Fast feature on an interface:
Switch(config)# interface fastethernet0/2
Switch(config-if)# spanning-tree portfast
You can verify your settings by entering the show running-config privileged EXEC command.
Related Commands Command Description
show running-config Displays the current operating configuration. For syntax
information, select Cisco IOS Release 12.2 Configuration Guides
and Command References > Cisco IOS Configuration
Fundamentals Command Reference, Release 12.2 > File
Management Commands > Configuration File Management
Commands.
spanning-tree bpdufilter Prevents a port from sending or receiving bridge protocol data units
(BPDUs).
spanning-tree bpduguard Puts a port in the error-disabled state when it receives a BPDU.
spanning-tree portfast (global
configuration)
Globally enables the BPDU filtering or the BPDU guard feature on
Port Fast-enabled ports or enables the Port Fast feature on all
nontrunking ports.