Re: portfast and router

[Karen . Young]

Chen,

You don't want to enable portfast on ANY port that hooks up to a multiport
device. Switch, router, hub, even a multi-homed server. Only enable it on a
device that has a SINGLE connection to the network. Even at that it would
be a good idea to set up the portfast guard stuff unless you can guarantee
that nobody can plug in a desktop hub or something.

The reason is that it is far too easy for routing loops to creep into your
network. Whether by accident on your part, or ignorance on the part of the
users (or even someone in IS who may not realize the problem...). However,
it will only happen with multiport devices.

Karen E Young
Network Engineer
ELF Technologies, Inc
[EMAIL PROTECTED]
Desk:  425-369-5369
Fax:  425-391-1774
Pager:  206-994-4514



                                                                                       
                             
                    "Chen, Scott"                                                      
                             
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                    "Chen, Scott"                                                      
                             
                                                                                       
                             
                                                                                       
                             



I have one port on a Catalyst 6500 connected to a router with fast
ethernet.
I also have spantree enable on the switches.  Currently I have the spantree
portfast feature disabled on that port on the Catalyst 6500 that connects
to
the router.  Should that be enable or disable and why?

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