Question on address configuration

[Matthew Lehman]

> -----Original Message-----
> From: Nick Sayer [mailto:nsayer@quack.kfu.com]
> Sent: Wednesday, January 16, 2002 7:14 AM
> To: Robert Elz
> Cc: Edward Lewis; 6BONE List
> Subject: Re: Question on address configuration
> 
> Robert Elz wrote:
> 
> >
> >Certainly DNS servers, DHCP servers, routers, and even SMTP servers
> (thanks
> >all the same, but I don't want a 2 day mail dead spot while my old
DNS
> >records TTL times out...) are the most likely candidates for
configured
> >addresses, but any host can have it.   Implementations that I'm aware
of
> >all allow this already - all they don't do is the compromise where
the
> >prefix comes from RA messages (just like fully autoconfigured
addresses),
> >and the token comes from configuration.   This really should be
added.
> >
> >kre
> >
> Everything you said is true, but I would add the small postscript that
> in 99% of the cases where you would find it truly desirable to set up
a
> well known address, you would be better off making that address
> site-local rather than based on the (routable) prefix. Your arguments
> about an SMTP server's DNS TTL can be made about any DNS records -- if
> the TTLs are causing you heartburn you should lower them. People
> typically want to configure manual addresses so that they don't have
to
> keep rewriting resolv.conf files (or equiv). The best way to handle
that
> is to look at the latest DNS autolocation draft (I forget the name
> offhand), which suggests fec0:0:0:ffff::[1,2,3]. Doing this you won't
> have to *ever* change references to the server even if your prefix
> changes.

I think the draft Nick is referencing is at:
http://www.ietf.org/internet-drafts/draft-ietf-ipngwg-dns-discovery-03.t
xt

There's also a related draft at:
http://www.ietf.org/internet-drafts/draft-ietf-ipngwg-dns-discovery-anal
ysis-00.txt


> 
> You are right, however, in that since the spec allows even pointless
> silly behavior implementations should be prepared for it. Perhaps
those
> implementations that use rtsol (kame) can modify rtsol to provide an
> additional argument to allow you to specify the suffix.
> 
>