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Re: Comparing an old flow snapshot with some packet size data

Robert Moskowitz <rgm3@chrysler.com> Wed, 21 August 1996 19:15 UTC

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Date: Wed, 21 Aug 1996 14:51:20 -0400
To: "Kent W. England" <kwe@6sigmanets.com>, Robert Moskowitz <rgm3@chrysler.com>, Andrew Partan <asp@partan.com>, Brian Carpenter CERN-CN <brian@dxcoms.cern.ch>
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From: Robert Moskowitz <rgm3@chrysler.com>
Subject: Re: Comparing an old flow snapshot with some packet size data
Cc: big-internet@munnari.oz.au
Precedence: bulk

At 11:23 AM 8/21/96 -0700, Kent W. England wrote:
>
>Backbones must support at least 1500 bytes and should support up to 9180.
>The only difference is how the routers use memory for buffering. If each
>packet is allocated the router's MTU, then there is a lot of wasted buffer
>memory between 500 bytes typical and 9180. If a router vendor has a problem
>with that much memory wastage, then I'd say it was up to them to allocate,
>say, 1500 bytes per packet, and handle an exception for anything beyond that
>MTU.

If it does it wrong, it negatively impacts on congestion (buffer full).

>So let's see to it that the backbones can handle anything up to ATM 9180 and
>try to get hosts to use path MTU discovery or their interface MTU of at
>least 1500.

Thanks Kent.

Robert Moskowitz
Chrysler Corporation
(810) 758-8212

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