Hi Fred,

I never underestimate operational issues.  ;-)  In previous lives I've been
a sysadmin/network admin/ISP.  Got those scars the hard way.

When systems explicitly know that locators are separate from addresses, when
locators can be automagically changed, then we can GREATLY reduce the
sysadmin's manual work and make it that much easier (read cheaper) to
renumber.  

We just need to spend the time to work on this technology.

Tony



On 5/27/10 3:07 PM, "Fred Baker" <f...@cisco.com> wrote:

> 
> 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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