we never actually did this though
vint
At 05:52 PM 1/25/2001 -0800, Peter Ford wrote:
>Ah, dual stacks, a time tested transition strategy. But there was some Application
>Layer Gateway cruft (ALG) although not at the level of sophistication and beauty of a
>NAT ...
>
>From RFC 801:
>
>Because all hosts can not be converted to TCP simultaneously, and
> some will implement only IP/TCP, it will be necessary to provide
> temporarily for communication between NCP-only hosts and TCP-only
> hosts. To do this certain hosts which implement both NCP and IP/TCP
> will be designated as relay hosts. These relay hosts will support
> Telnet, FTP, and Mail services on both NCP and TCP. These relay
> services will be provided beginning in November 1981, and will be
> fully in place in January 1982.
>
> Initially there will be many NCP-only hosts and a few TCP-only hosts,
> and the load on the relay hosts will be relatively light. As time
> goes by, and the conversion progresses, there will be more TCP
> capable hosts, and fewer NCP-only hosts, plus new TCP-only hosts.
> But, presumably most hosts that are now NCP-only will implement
> IP/TCP in addition to their NCP and become "dual protocol" hosts.
> So, while the load on the relay hosts will rise, it will not be a
> substantial portion of the total traffic.
