Serving static AAAA records with IOS' DNS server

Question

Hi guys,
Has anyone managed to get IOS to serve statically defined AAAA records? I do this just fine with A records as such :
On the router :
ip dns server
ip host ns.example.com 1.1.1.1
ip host somehost.example.com 1.1.1.2
ip dns primary example.org soa ns.example.org [email protected] 21600 900 7776000 86400
From the Linux box :
unixhost$ dig @1.1.1.1 somehost.example.com
; <<>> DiG 9.8.1-P1 <<>> @1.1.1.1 somehost.example.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32168
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;somehost.example.com.        IN    A
;; ANSWER SECTION:
somehost.example.com.    10    IN    A   1.1.1.2
;; Query time: 1 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Wed Aug 15 00:42:11 2012
;; MSG SIZE  rcvd: 50
Interestingly whenever I add a static ipv6 entry, I get the SOA as  an answer instead of the actual AAAA record. But from the router itself,  it can use the statically defined hosts just fine.
On the router :
ipv6 host somehost.example.com 2001:1:1:1::2
From the Linux box :
unixhost$ dig -t AAAA @1.1.1.1 somehost.example.com
; <<>> DiG 9.8.1-P1 <<>> -t AAAA @1.1.1.1 somehost.example.com
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53347
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;somehost.example.com.        IN    AAAA
;; AUTHORITY SECTION:
somehost.example.com.        86400    IN    SOA  ns.example.com. [email protected]. 3553994542 21600 900 7776000 86400
;; Query time: 1 msec
;; SERVER: 192.168.200.252#53(192.168.200.252)
;; WHEN: Wed Aug 15 00:42:22 2012
;; MSG SIZE  rcvd: 108
But from the router, it works just fine :
router#ping ipv6 somehost.example.com
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:1:1:1::2, timeout is 2 seconds:
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/1/4 ms
I'm running 15.2(2)T1.
Thanks,
Eric Lauriault

Answer 1

Hello Everyone,
in case someone runs into this thread: In our case it turned out that the problem was related to the DNS Server service. Regardless of the above configuration settings on the NIC and in the registry, the DNS server will always register in DNS using
all of its IPs that the service is listening on. To change this behaviour you can tell the DNS service to only register individual IPS in the registry:
HKLM\SYSTEM\CurrentControlSet\Services\DNS\Parameters
      Add a Reg_Multi_SZ called "PublishAddresses" and specify the list of IPs
In our case we added just one of the three configured IPs and from then on the server only registered this address and not the other ones.
Regards
HarryNew