Hi,
im running two identical configured bind9 servers. The first one without an 'public' ipv6 address, the second one has an ipv6 address. Since this morning the first one still returns a aaaa record for dig @localhost google.de aaaa


; <<>> DiG 9.9.5-3ubuntu0.1-Ubuntu <<>> @localhost google.de aaaa
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18342
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 5

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;google.de. IN AAAA

;; ANSWER SECTION:
google.de. 300 IN AAAA 2a00:1450:4001:80d::100f

;; AUTHORITY SECTION:
google.de. 83107 IN NS ns4.google.com.
google.de. 83107 IN NS ns1.google.com.
google.de. 83107 IN NS ns3.google.com.
google.de. 83107 IN NS ns2.google.com.

;; ADDITIONAL SECTION:
ns1.google.com. 342327 IN A 216.239.32.10
ns2.google.com. 342327 IN A 216.239.34.10
ns3.google.com. 342327 IN A 216.239.36.10
ns4.google.com. 342327 IN A 216.239.38.10

;; Query time: 14 msec
;; SERVER: ::1#53(::1)
;; WHEN: Tue Jan 20 10:16:14 CET 2015
;; MSG SIZE rcvd: 212


The second one, since this morning, doesn’t.


; <<>> DiG 9.9.5-3ubuntu0.1-Ubuntu <<>> @::1 google.de AAAA
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19599
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;google.de. IN AAAA

;; AUTHORITY SECTION:
google.de. 359 IN SOA ns4.google.com. dns-admin.google.com. 1579719 900 900 1800 60

;; Query time: 0 msec
;; SERVER: ::1#53(::1)
;; WHEN: Tue Jan 20 10:54:05 CET 2015
;; MSG SIZE rcvd: 98





He returns one fore facebook or heise but not for google.de or youtube …
The returned SOA serial number is for both answer’s the same.