Delegating class C's

[Bob Vance]

You generally only use the CNAME technique when you are subdividing on a
non-octet boundary.
For a full "class C" (by which we really mean 3 full octets or a "/24"
prefix length, because with CIDR, "Class" is meaningless), this is on an
octet boundary and you simply delegate the entire class C:


:: $ORIGIN  168.192.in-addr.arpa.
   ...

0   IN NS   ns.0-subnet-domain.my.com.
1   IN NS   ns.1-subnet-domain.my.com.
2   IN NS   yoda.fornu.my.com.
3   IN NS   ns.yahoo.com.


or whatever :)



-------------------------------------------------
Tks        | <mailto:BVance at sbm.com>
BV         | <mailto:BobVance at alumni.caltech.edu>
Sr. Technical Consultant,  SBM, A Gates/Arrow Co.
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-----Original Message-----
From: bind-users-bounce at isc.org [mailto:bind-users-bounce at isc.org]On
Behalf Of Robert Gahl
Sent: Tuesday, May 15, 2001 1:15 PM
To: bind-users at isc.org
Subject: Delegating class C's



I've been pouring over the 3rd edition of DNS & BIND for delegating
reverses and I'm, well, confused (or, at least, I'm confused on a higher
plain. Here's the situation.

We run a non-routeable class C in our office (192.168.254). We are
creating
other 192.168.x "sub-domains" for labs and such, but we need to delegate
not just the forward but the reverse to these DNS servers as well.
Rather
than go into, say, db.192.168.0, and list 255 entries of (looking at
page
217 of the book):

x.0.168.192.in-addr.arpa.       IN CNAME
x.0-255.0.168.192.in-addr.arpa.

with

0-255.0.168.192.in-addr.arpa.   IN NS           ns1.eng.fireclick.com.

is there a short hand that says, give the entire class C to the machine
ns1.eng.fireclick.com? Or, do I just have to pre-delegate each IP within
the master DNS server's db.192.168.254 zone file?

BTW, Cricket, thanks for the article on views. I've been wanting to do
just
that (internal vs. external) to provide an "external" DNS server, but as
a
secondary to our internal DNS server, but yet have that "external" DNS
server act as primary for the world's view of us.

===
Bob Gahl Bicycle (Ryan Vanguard) Mobile ||     @
     ARPA/Internet: bgahl at bawcsa.org     ||  !_ \
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"Sahn joong moe low ful how jee yah ching wong" - "When the
mountain has no tigers, the monkey will also declare himself
king." Chinese Proverb