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Date:      Sat, 16 Nov 1996 14:53:29 -0500
From:      Andrew Herdman <andrew@why.whine.com>
To:        Bradley Dunn <bradley@dunn.org>
Cc:        dennis <dennis@etinc.com>, isp@freebsd.org
Subject:   Re: changed to: Frac T3?
Message-ID:  <Pine.BSF.3.95.961116145209.451A-100000@why>
In-Reply-To: <Pine.WNT.3.95.961116124539.-512999s-100000@swoosh.dunn.org>

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On Sat, 16 Nov 1996, Bradley Dunn wrote:

> On Sat, 16 Nov 1996, dennis wrote:
> 
> > >On Fri, 15 Nov 1996, dennis wrote:
> > >
> > >> What I was saying was that I dont thing unix can route a steady
> > >> 86Mbs data stream, so a full T3 on a unix box may very well be
> > >> overkill.
> > >
> > >Hmmm...Apparently you are not aware of the Ascend GRF 400.
> > >http://www.ascend.com/products/grf400/grf400index.html
> > 
> > Perhaps you haven't read it yourself? They are certainly not running anything
> > similar to standard unix....they "cheat" by maintaining on-board caches so
> > packets don't have to pass through the IP layer, as BSD design requires. 
> > Certainly you can do something similar for BSD systems, but it won't
> > be a standard release O/S afterwards. Such things are OK if you are building
> > a special-function system, but non highly desireable for general purpose O/Ss
> 
> Exactly, but you seemed to be saying that unix could not route at that
> speed. The Ascend embedded OS is a hacked unix. It uses gated, but you
> could in fact use anything that writes to the unix routing socket. I call
> that unix.
> 
> -BD
> 

The UNIX itself doesn't actually do the routing.  It creates the table and
download's it down to the actual interface cards which use a type of
silicon switching to route the packets.  The UNIX portion of the box
simply makes the tables.

 Andrew





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