[29231] in North American Network Operators' Group
Re: exchange point media (was: Re: MAE-EAST Moving? ...)
daemon@ATHENA.MIT.EDU (Dana Hudes)
Thu Jun 15 00:07:31 2000
Message-ID: <00a901bfd678$91f47580$3d5cdcd1@hudes.org>
From: "Dana Hudes" <dhudes@hudes.org>
To: "Steven M. Bellovin" <smb@research.att.com>,
"Mikael Abrahamsson" <swmike@swm.pp.se>
Cc: <nanog@merit.edu>
Date: Wed, 14 Jun 2000 23:19:51 -0400
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If one wanted to have large MTU that is supported by ATM. As Steven =
points out, you are limited by the endpoints (well, actually the =
smallest MTU anywhere in the path). What large MTU might help with at =
an exchange point is allowing an entire BGP UPDATE to fit in single =
packet where lots of routes are exchanged. OTOH, initial table transfer =
is nothing to worry about at these speeds and if you're flapping so many =
routes that the fragmentation of BGP UPDATE becomes an issue then aren't =
there other, bigger, problems?
----- Original Message -----=20
From: "Steven M. Bellovin" <smb@research.att.com>
To: "Mikael Abrahamsson" <swmike@swm.pp.se>
Cc: <nanog@merit.edu>
Sent: Wednesday, June 14, 2000 9:17 PM
Subject: Re: exchange point media (was: Re: MAE-EAST Moving? ...)=20
>=20
> In message <Pine.LNX.4.10.10006142245540.750-100000@uplift.swm.pp.se>, =
Mikael A
> brahamsson writes:
>=20
> >
> >Gigabit ethernet sounds nice but the MTU of 1500 is really =
restricting
> >that technology. I have heard rumours that 10gig ethernet will have =
at
> >least 4000+ byte MTU, probably 9000+ which might make it viable to =
use for
> >a shared medium exchange point as the hardware probably will be =
fairly
> >cheap and/as it will be widely available supported by many vendors.
>=20
> How will that type of MTU help an exchange point? Aren't you really=20
> limited by what size packets the customers are originating and/or can=20
> pass through the net to that point?
>=20
> --Steve Bellovin
>=20
>=20
