[1497] in North American Network Operators' Group
Re: value of co-location
daemon@ATHENA.MIT.EDU (Stephen Stuart)
Tue Jan 23 02:09:11 1996
To: "Joseph Lawrence" <lawrence@mci.net>
Cc: stuart@pa.dec.com, nanog@merit.edu
In-Reply-To: Your message of "Sat, 20 Jan 1996 14:59:17 EST."
<QQzzjj26590.199601201959@rodan.UU.NET>
Date: Mon, 22 Jan 96 22:39:46 -0800
From: Stephen Stuart <stuart@pa.dec.com>
> 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).
The Gigaswitch SCP card has (at last count) 16MB of DRAM for buffering
packets (and other stuff) that get forwarded by the crossbar. The FGL
cards (FDDI line cards) have 1MB of DRAM.
There's a Digital Technical journal article available on-line that
describes the Gigaswitch in detail. The URL is
http://www.digital.com/info/hpc/sc95/sygiga-dtj.html
Buffer management is discussed in the "Design Issues" section:
http://www.digital.com/.i/info/hpc/sc95/sygiga-dtj-design.html
Module details (like types and quantities of memory) are listed in the
(hm) "Module Details" section:
http://www.digital.com/.i/info/hpc/sc95/sygiga-dtj-module.html
We have a Gigaswitch/FDDI at the Palo Alto interconnect, if you'd like
to have a look at one.
Stephen
- -----
Stephen Stuart stuart@pa.dec.com
Network Systems Laboratory
Digital Equipment Corporation
