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Date:      Mon, 10 Jul 2006 14:56:27 -0700
From:      Brooks Davis <brooks@one-eyed-alien.net>
To:        User Freebsd <freebsd@hub.org>
Cc:        Pyun YongHyeon <pyunyh@gmail.com>, freebsd-stable@freebsd.org, Peter Jeremy <peterjeremy@optushome.com.au>, Atanas <atanas@asd.aplus.net>, Robert Watson <rwatson@freebsd.org>, Michael Vince <mv@thebeastie.org>
Subject:   Re: em device hangs on ifconfig alias ...
Message-ID:  <20060710215627.GA3507@odin.ac.hmc.edu>
In-Reply-To: <20060710175447.A1799@ganymede.hub.org>
References:  <44AEB0CB.5060102@asd.aplus.net> <20060707181750.O1171@ganymede.hub.org> <20060707223609.N60542@fledge.watson.org> <20060708033254.GB87930@cdnetworks.co.kr> <20060708172001.GB77281@ip.net.ua> <6.2.3.4.0.20060709234941.12531860@64.7.153.2> <20060710010540.G1799@ganymede.hub.org> <6.2.3.4.0.20060710001040.125441e0@64.7.153.2> <20060710070951.GA23181@hugo10.ka.punkt.de> <20060710175447.A1799@ganymede.hub.org>

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On Mon, Jul 10, 2006 at 05:55:23PM -0300, User Freebsd wrote:
> On Mon, 10 Jul 2006, Patrick M. Hausen wrote:
>=20
> >Mornin'!
> >
> >On Mon, Jul 10, 2006 at 12:11:36AM -0400, Mike Tancsa wrote:
> >
> >>>Not sure what STP is
> >>
> >>Spanning Tree Protocol.  Having the link go up and down would cause
> >>the switch port to block traffic for a period of time.
> >
> >Of course, any reasonable administrator would configure
> >
> >	interface FastEthernet0/1
> >	 spanning-tree portfast
>=20
> 'k, I know nothing about Cisco but do have access to change my configs=20
> (knowing nothing tends to keep me from doing too much playing) ... what=
=20
> does the above do, exactly?

It tells the switch that this port will never be anything but a leaf in
the tree so STP does not need to re run before allowing packets to flow.
If you do this and then create a loop with it, bad things happen, but
cisco recommends it in general.

-- Brooks

--=20
Any statement of the form "X is the one, true Y" is FALSE.
PGP fingerprint 655D 519C 26A7 82E7 2529  9BF0 5D8E 8BE9 F238 1AD4

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