[ih] History of duplicate address tests

[Andrew G. Malis]

John,

ARP (RFC 826) trivially enables duplicate IPv4 address detection on
Ethernet networks (just ARP for your own address and see if anyone else
responds), so I guess November 1982 for IP over Ethernet.

Cheers,
Andy


On Tue, Nov 29, 2022 at 3:23 PM John Kristoff via Internet-history <
internet-history at elists.isoc.org> wrote:

> My earliest memory, because that is the time of my entry into the
> field, of duplicate address detection was done on Token Ring networks
> during ring insertion (phase 2 - address verification).  More recently
> IPv6 has duplicate address detection (dad).
>
> I'm curious to know about the earliest of duplicate address detection
> mechanisms.  I imagine there were some predating what I remember about
> Token Ring, but this is the kind of thing that is difficult to uncover
> without some hints. Any pointers to the earliest of these functions in
> networking?
>
> Thanks kindly,
>
> John
> --
> Internet-history mailing list
> Internet-history at elists.isoc.org
> https://elists.isoc.org/mailman/listinfo/internet-history
>