On May 27, 2010, at 10:43 AM, Tony Li wrote:

> It's not that hard, all the piece parts are there...  We need to be able to
> inject a set of locators into the IGP.  Then we need an option in ND to
> propagate that to the hosts.

See RFC 4192. It turns out that if people are sensible, renumbering is almost 
trivial. The biggest problems are configurations in routers that require 
explicit statement of addresses or prefixes (ACLs, Route Maps, etc) and 
shortcuts people take in applications. But those configurations and 
shortcuts... When I wrote the first cut at that document, I sent a note to some 
operational lists saying "I know you're going to tell me I'm nuts; what I need 
to understand is *why* I'm nuts". It was quite an education.

I would not underestimate the operational issues in renumbering.

http://www.ipinc.net/IPv4.GIF

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