Delegating Part Of Class C?

[buffalo at icarus.yml.com]

On Wed, 21 Jul 1999, Joseph S D Yao wrote:

> One problem is, you're representing the first parts as xxx.xxx.xxx, so
> I can't tell whether you are correctly reversing the parts of the IP
> address or not.

OK, to avoid any confusion, here's the named.conf entry for the subdomain,
and the contents of the db.file for the sub domain that BigISP has
delegated to us. 

As a reminder, BigISP has delegated 

xxx.xxx.xxx.80 through xxx.xxx.xxx.94 

to us. (note that given an example IP of 123.123.123.80, I am reversing it
to 80.123.123.123.IN-ADDR.ARPA as required) And yes, I own and am
authoritative for 'mydomain.com' below. Forward lookups are working
normally:

First, the entry from named.conf:

------------------------------------
// Delegated to us by BigISP for client X.
zone "80.xxx.xxx.xxx.IN-ADDR.ARPA" {
        type master;
        file "db.xxx.xxx.xxx..80"; 
};
------------------------------------

Now. the db file:

----------------------------
; primaryNS -- db.xxx.xxx.xxx.80
;
;
80.xxx.xxx.xxx.in-addr.arpa. IN  SOA my.primaryNS.com. buffalo.yml.com. (
              1
          10800
           3600
          86400
          86400 )

80.xxx.xxx.xxx.in-addr.arpa.  IN  NS  my.primaryNS.com.
80.xxx.xxx.xxx.in-addr.arpa.  IN  NS  my.secondaryNS.com.

; .81-.93 were delegated to us by BigISP for use with the machines
; hosted at site "A". This allows us to set up reverse lookup.

81.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host1.mydomain.com.
82.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host2.mydomain.com.
83.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host3.mydomain.com.
84.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host4.mydomain.com.
85.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host5.mydomain.com.
86.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host6.mydomain.com.
87.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host7.mydomain.com.
88.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host8.mydomain.com.
89.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host9.mydomain.com.
90.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host10.mydomain.com.
91.xxx.xxx.xxx.IN-ADDR.ARPA.            IN  PTR   host11.mydomain.com.

; end of db.xxx.xxx.xxx.80 on primaryNS

------------------------------------

My understanding was the this was the way to do it, but if I set it up
this way, all lookups I do on xxx.xxx.xxx.81 through xxx.xxx.xxx.93 fail.
The log error I get each time I try a lookup with this configuration on
(for example) xxx.xxx.xxx.82 is:

--------------------------------------
Jul 22 11:32:09 primaryNS named[10281]: dangling CNAME pointer
(82.80.xxx.xxx.xxx.in-addr.arpa)
--------------------------------------

Am I totally screwing this up?

Many thanks for the continuing helpful feedback...

--Duncan