[ih] invention of multicast addressing
dcrocker at gmail.com
Sat May 8 09:57:32 PDT 2010
On 5/7/2010 6:41 PM, Noel Chiappa wrote:
> > From: Dave Farber<dave at farber.net>
> > A critical part of the Irvine ring was a multiaddress capability. I
> > will hunt the paper when I get home. Date about 1972
> I think I must have forgotten some earlier UC Irvine work when I made this
> >> ... it appears that Mockapetris, Lyle and Farber may have proposed a
> >> form of multicasting in 1977 (IFIP Congress paper of August 1977 that I
> >> don't have).
> > The UC Irvine stuff ... The hardware implementation is described at a
> > high level in:
> > IEN-82, "LCS Net Address Format"
> > since the MIT V1 Ring was the Irvine ring
> since it sounds from the above that there was an earlier UC Irvine ring (in
> the early 70s), and the Mockapetric design that MIT implemented (starting in
> the fall of '77) was a second-generation design?
As I recall, the MIT version of the Irvine ring tossed out the process
addressing table, which had taken about a quarter of the board's real estate.
This would have eliminated the very natural "multiaddress" potential of the
ring, although it could have been present in a different form of course.
I've copied Ken Porgran, in case he can offer some first-hand clarity.
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