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IPv6 DNS autoconfiguration?
On Thu, May 25, 2000 at 12:46:50PM +1000, Robert Elz wrote:
> [special cases for finding a nameserver] ... But, I'm just as likely
> to need to fine my SMTP server, POP server, printer server, NFS server
> for my user files, NTP server, HTTP proxy, ...
The difference is, you are likely to ``find'' all those other servers using
symbolic names. Especially when their numeric ``name'' is forty characters
long, you will be inclined to deal with textual hostnames even if you are a
sloppy and artless sysadmin. Therefore, you must find the nameserver before
you go looking for all that other PeeCee Workstation nonsense.
For example, on Unix when I boot diskless boxes I make sure they have a
reslov.conf immediately so I can use hostnames in fstab. They need a
nameserver even before they grab themselves an NFS server for /usr. The
nameserver is different from those other servers you mentioned.
I have seen some vendor Unixes that will even resort to setting their
hostnames from reverse lookup records. Consider:
1) get local IPaddr with address discovery or some built-in IPv6 stuff
2) find nameserver using built-in mysterious clever scheme
3) perform a reverse-lookup to get hostname.domainname. Set the
hostname and the 'search' domainlist.
4) default to well-known CNAME's:
Thus, there is a crude way of ``finding'' all these less important services,
even without DHCP, given a way to automatically find a nameserver first.
It isn't a particularly _good_ way, but it isn't a rediculous way either.
It serves to demonstrate the ``specialness'' of the nameserver.
While I lack the knowledge to comment on the worthiness of N. Sayer's
specific scheme, it seems clear to me that giving the nameserver special
treatment compared to other random daemons is a reasonable thing to do.
Not necessarily desireable, but reasonable to a first order. I disagree
with your analogy.
Miles Nordin / v:+1 720 841-8308 fax:+1 530 579-8680
555 Bryant Street PMB 182 / Palo Alto, CA 94301-1700 / US
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