Spanning-Tree Portfast Default - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

spanning-tree portfast default

To globally enable PortFast by default on all access ports, use the spanning-tree portfast default
command. To disable PortFast as default on all access ports, use the no form of this command.
Syntax Description
This command has no arguments or keywords.
Defaults PortFast is disabled.
Command Modes Global configuration mode
Command History Release
12.1(12c)EW
Usage Guidelines
Caution Use this command only with the interfaces that connect to end stations; otherwise, an accidental
topology loop could cause a data packet loop and disrupt the Catalyst 4500 series switch and network
operation.
An interface with PortFast mode enabled is moved directly to the spanning-tree forwarding state when
linkup occurs without waiting for the standard forward-time delay.
You can enable PortFast mode on individual interfaces using the
configuration mode)
Examples This example shows how to globally enable PortFast by default on all access ports:
Switch(config)# spanning-tree portfast default
Switch(config)#
Related Commands Command
show spanning-tree
spanning-tree portfast (interface
configuration mode)
OL-25342 -01
spanning-tree portfast default
no spanning-tree portfast default
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
command.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.3.0SG and IOS 15.1(1)SG)
spanning-tree portfast (interface
Description
Displays spanning-tree state information.
Enables PortFast mode.
spanning-tree portfast default
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