Patrick,
I will check for loops, however the use of portfast is to put the port
into the forwarding stage of the STP upon connectivity. The alogorithm
will still run in the background, however you do run the risk of a loop
until the port discovers this. If a loop is indeed introduced the port
will eventually go into the blocking stage.
Portfast has nothing to do with negotiation. It only allows the port to
initially skip the listening and learning stages of the alogorithm,
therefore the port goes to forwarding stage upon sensining connectivity.
Joe
"Greene, Patrick" wrote:
>
>
> Set portfast on any ports connecting to workstations..this will
> greatly improve the negotiation time when the station is coming up.
> Just do not set port fast on ports connecting to hubs or switches as
> it does not check for loops via spanning tree
>
> Patrick
>
> -----Original Message-----
> From: ed smith [mailto:[EMAIL PROTECTED]]
> Sent: Wednesday, September 06, 2000 9:33 AM
> To: [EMAIL PROTECTED]
> Subject: Portfast ???
>
> I'm swapping out a 2900XL with a 2924C XL to give us Fiber capability.
> Since
> we have customers on the current switch I want to keep down time to a
> minimum. One suggestion has been to, on the new switch put it into
> portfast
> mode.
>
> Has anyone done this before? Are there any problems you encountered or
>
> things I should be aware of?
>
> Just a quick note today....
>
> Thanks for any input.
>
> Ed
> CCNA
>
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