[VoIP] ENUM Round Robin DNS?

[Greg Blakely]

> 
> What is CNET using for ENUM DNS service presently?
> More than one DNS server?
>
Usually 4 servers:  one at my work, one at home, and two at
backupdns.com.

Currently, the two at backupdns.com have corrupt records, so I have
dropped them for now.  As soon as I get that squared away, they'll be
back.

If anyone wants to 'secondary' the zone, let me know off-list, and we'll
work out the details.

As to multiple NAPTR records, Mark is correct:  we can make multiple
entries.  I'll have to re-read my BIND documentation, but I believe that
the 'named' server will respond with all records, if the querying end is
capable of accepting more than one record, and responds in a round-robin
method to those querying clients that are capable of accepting only one
result.

Can anyone confirm or debunk this?

I made a multiple "A" entry for robin.ckts.info.   The "dig" query
returned both. The second 'dig' query returned both in the opposite
order:

==============================================


; <<>> DiG 9.3.1 <<>> robin.ckts.info
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24257
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;robin.ckts.info.               IN      A

;; ANSWER SECTION:
robin.ckts.info.        10800   IN      A       209.98.47.193
robin.ckts.info.        10800   IN      A       76.164.8.100

;; AUTHORITY SECTION:
ckts.info.              10800   IN      NS      ns02.vyger.net.
ckts.info.              10800   IN      NS      prlkmngbds0.ckts.info.

;; ADDITIONAL SECTION:
ns02.vyger.net.         86400   IN      A       209.98.47.194
prlkmngbds0.ckts.info.  10800   IN      A       76.164.8.100

;; Query time: 2 msec
;; SERVER: 172.16.10.4#53(172.16.10.4)
;; WHEN: Sun Jun 10 21:37:38 2007
;; MSG SIZE  rcvd: 151








; <<>> DiG 9.3.1 <<>> robin.ckts.info
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58662
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;robin.ckts.info.               IN      A

;; ANSWER SECTION:
robin.ckts.info.        10800   IN      A       76.164.8.100
robin.ckts.info.        10800   IN      A       209.98.47.193

;; AUTHORITY SECTION:
ckts.info.              10800   IN      NS      prlkmngbds0.ckts.info.
ckts.info.              10800   IN      NS      ns02.vyger.net.

;; ADDITIONAL SECTION:
ns02.vyger.net.         86400   IN      A       209.98.47.194
prlkmngbds0.ckts.info.  10800   IN      A       76.164.8.100

;; Query time: 1 msec
;; SERVER: 172.16.10.4#53(172.16.10.4)
;; WHEN: Sun Jun 10 21:39:04 2007
;; MSG SIZE  rcvd: 151