[1489] in North American Network Operators' Group
Re: value of co-location
daemon@ATHENA.MIT.EDU (Bilal Chinoy)
Mon Jan 22 13:49:12 1996
From: bac@serendip.sdsc.edu (Bilal Chinoy)
To: lawrence@mci.net (Joseph Lawrence)
Date: Mon, 22 Jan 1996 10:36:28 -0800 (PST)
Cc: nanog@merit.edu
In-Reply-To: <199601221429.JAA05970@clone6.reston.mci.net> from "Joseph Lawrence" at Jan 22, 96 09:29:06 am
From
"The GIGAswitch System: A High-Performance Packet
Switching Platform".
Robert J. Souza et al (7 listed authors)
Digital Technical Journal, vol. 6, no. 1 1994.
The switch fabric is a non-blocking crossbar capable
of full 100 Mbps full duplex rates (actually, about 150 Mbps:
a 25 Mhz clock with a 6 bit data path). Custom VLSI.
The FDDI cards have 1 MB/port that (i believe) is used for
packet buffering. Both input and output buffering is
required. Cut through forwarding is supported.
Bottom line: about 270,000 pps per port, 14 microsec.
forwarding latency AND superior reliability. The choice
for NAP designers everywhere :)-
-- Bilal
>
> While we are on the subject of delay-bandwidth buffering in ATM switches.
> Does anyone know where I can get a router that has adequate buffering
> for those pesky little 1/4 Kbyte average size packets that keep
> floating around the net :).
>
> -joe
>
> PS. Also does someone have numbers for the amount of
> buffering in a DEC gigaswitch, and information on their buffer
> managment (i.e. variable length buffers vs fixed length buffers).
>
