Delegating Part Of Class C?

[glen herrmannsfeldt]

buffalo at icarus.yml.com writes:

(snip various complications making RFC2317 work)

>I'm sure you do too :-)

>I went to lunch and came back, and now without further changes, lookups
>are working(!):

># nslookup xxx.xxx.xxx.82
>Server:  localhost
>Address:  127.0.0.1

>Name:    host1.mydomain.com
>Address:  xxx.xxx.xxx.82
>Aliases:  82.xxx.xxx.xxx.in-addr.arpa

>While I'm quite pleased to see this resolved, though the solution seems
>very strange to me. I still can't make sense out of how the 5 octet scheme
>makes this work, or why the lookups come out as they do.

If you think of it as five octets, then it is confusing.  Just think of it
as a domain name, and it makes more sense.  DNS doesn't care if the name
is made of letters or numbers, it just looks them up.  I usually use words
instead of numbers for the subdomain.  Note that there is no requirement
that the delegated domain even be in in-addr.arpa.  It is a CNAME pointing
to a PTR, and that PTR can be in any domain with any name.

-- glen