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Switches Port fast

Already STP running in the switch. Can i configure port fast in all the port in that switch?

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VIP Mentor

Re: Switches Port fast

Yes, you can enable it globally using "spanning tree portfast default"

Your switchport has to be access mode in order to take effect


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VIP Expert

Re: Switches Port fast

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The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.

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Posting

Yes, it won't impact current port activity.

BTW, if you use portfast, you should also use BPDUGuard.  Even with BPDUGuard, you increase the chances off a L2 loop happening, but this additional risk is often considered acceptable.  Lastly, are you using rapid-STP?  If not, you might want to consider using it.

Contributor

Re: Switches Port fast

You can enable this feature if your switch is running PVST+, rapid PVST+, or MSTP.

Beginning in privileged EXEC mode, follow these steps to enable Port Fast. This procedure is optional.
Step 1
configure terminal
Enter global configuration mode.
 

Step 2
interface interface-id
Specify an interface to configure, and enter interface configuration mode.
 

Step 3
spanning-tree portfast [ trunk ]
Enable Port Fast on an access port connected to a single workstation or server. By specifying the trunk keyword, you can enable Port Fast on a trunk port.
Note To enable Port Fast on trunk ports, you must use the spanning-tree portfast trunk interface configuration command. The spanning-tree portfast command will not work on trunk ports.
Caution Make sure that there are no loops in the network between the trunk port and the workstation or server before you enable Port Fast on a trunk port.
By default, Port Fast is disabled on all interfaces.
 

Step 4
end
Return to privileged EXEC mode.
 

Step 5
show spanning-tree interface interface-id portfast
Verify your entries.

Step 6
opy running-config startup-config

(Optional) Save your entries in the configuration file.

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