too many routes

Jay R. Ashworth jra at
Fri Sep 12 01:31:39 UTC 1997

On Thu, Sep 11, 1997 at 01:01:45PM -0700, Michael Dillon wrote:
> At 2:02 PM -0400 9/11/97, Jay R. Ashworth wrote:
> >On Wed, Sep 10, 1997 at 09:11:55PM -0400, Sean M. Doran wrote:
> >> Sanjay Dani <sanjay at> writes:
> >> > There are backbone providers and there are providers of specialized
> >> > ISP or hosting or security etc. services that need independent* IP
> >> > address space and do not have to waste resources on building a private
> >> > "backbone".
> >>
> >> NAT.
> >
> >Perhaps I misunderstood Sanjay, Sean, but I believe his concern was
> >that the addresses _not be the property of an upstream (ie: backbone)
> >provider_ to provide flexibility of connection choice.
> >
> >NAT will not solve this problem; it resides at too low a level of the
> >theoretical architecture, being used primarily to avoid renumbering of
> >internetworks.  This isn't a network numbering problem, it's a routing
> >problem.
> Please, let's think this through carefully before making such
> pronouncements. If the problem to be solved is providing flexibility of
> choice, then Sean is quite right and NAT (plus other renumbering
> technologies) is the solution for most people. If you use NAT and
> renumbering technologies then you don't give a darn what your IP address is
> or who gave it to you as long as it is globally routable. You still have
> flexibility of choice in that you can switch upstream providers on a whim
> and use Paul Vixie's BSD tricks to multihome if that matters.

Ok; I've taken this private, because I'm only close to getting what
you're saying, and my feet are too big.

[ reads, thinks, chnages mind ]




Number the internal stuff privately and use NAT to renumber the
external appearances when necessary.  Fix the DNS when you do.

Forgive me, all; I'm climbing back under my rock now.

-- jr '/24' a
Jay R. Ashworth                                                jra at
Member of the Technical Staff             Unsolicited Commercial Emailers Sued
The Suncoast Freenet      "People propose, science studies, technology
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