Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!pasteur!ucbvax!UDEL.EDU!Mills
From: Mills@UDEL.EDU
Newsgroups: comp.protocols.tcp-ip
Subject: Re:  what is dynamic IP address assignment
Message-ID: <8810081242.aa01044@Huey.UDEL.EDU>
Date: 8 Oct 88 16:42:51 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 20

Craig,

Yummy, you stroked one of my favorite personal chords. Unpeeling another
layer, the issue is whether you take your personal address with you or
borrow one at your destination. The former approach is more fun, even if
it does seem to require a flat address space. However, if you treat
roaming hosts as relatively rare, you can map "tunnels" onto the routing
fabric of your net through suitable modification of the routing tables
and update message formats. Some nets, including the Phas-I NSFNET
Backbone and several fuzzball nets scattered about the netscape in fact
include this feature. That's how my personal fuzzball at home pretends
it has addresses on three nets, including ARPANET (using transparent-
host addressing), but is some hops behind the gateway to those nets.

It's all done with mask-and-match tables and logical-host addressing,
folks. A ubiquitous roaming feature like this could be incorporated
into the Internet architecture by suitable modification of several
hundred gatewasy. Only.

Dave