AAAA's for www.netflix.com

Dave Temkin dave at temk.in
Thu Jun 7 13:52:29 UTC 2012


Just to close the loop on this - UltraDNS has an issue with CNAMEs and their Directional DNS service.  We 
(Netflix) have applied a workaround and it appears stable.

-Dave

On 6/6/12 8:05 AM, Frank Bulk wrote:
> I started monitoring IPv6 access to www.netflix.com after seeing this
> posting
> (http://www.personal.psu.edu/dvm105/blogs/ipv6/2012/06/netflix-is-back.html)
> and what I found, over the week, was that access was coming and going
> (www.premieronline.net/~fbulk/netflix.png).  But not because of IPv6
> connectivity, but because the AAAA's were coming and going.  Netflix's DNS
> TTL is pretty short.
>
> I assume Netflix has some global DNS load balancing so my perspective may
> not be complete.  Has anyone else been seeing this?
>
> I contacted a Netflix employee (he's well known on this list) and he
> responded once but I haven't heard back since Saturday.
>
> Here's some sample queries from Saturday and today.
> =========================================================
> nagios:/home/fbulk# dig AAAA www.netflix.com
>
> ;<<>>  DiG 9.7.3<<>>  AAAA www.netflix.com
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 26825
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.netflix.com.               IN      AAAA
>
> ;; AUTHORITY SECTION:
> netflix.com.            150     IN      SOA     dns.netflix.com.
> nicadmin.netflix.com. 2012060104 900 600 1209600 1800
>
> ;; Query time: 0 msec
> ;; SERVER: 127.0.0.1#53(127.0.0.1)
> ;; WHEN: Sat Jun  2 09:29:17 2012
> ;; MSG SIZE  rcvd: 82
>
> nagios:/home/fbulk#
> =========================================================
>
> =========================================================
> nagios:/home/fbulk# dig AAAA www.netflix.com
>
> ;<<>>  DiG 9.7.3<<>>  AAAA www.netflix.com
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33117
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 9, AUTHORITY: 8, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.netflix.com.               IN      AAAA
>
> ;; ANSWER SECTION:
> www.netflix.com.        132     IN      CNAME
> dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com.
> dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com. 12 IN
> AAAA 2406:da00:ff00::3210:e195
> dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com. 12 IN
> AAAA 2406:da00:ff00::3213:5282
> dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com. 12 IN
> AAAA 2406:da00:ff00::3213:6340
> dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com. 12 IN
> AAAA 2406:da00:ff00::3213:779a
> dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com. 12 IN
> AAAA 2406:da00:ff00::1715:75cd
> dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com. 12 IN
> AAAA 2406:da00:ff00::1715:eceb
> dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com. 12 IN
> AAAA 2406:da00:ff00::1717:e388
> dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com. 12 IN
> AAAA 2406:da00:ff00::1717:eb58
>
> ;; AUTHORITY SECTION:
> elb.amazonaws.com.      7092    IN      NS      ns-916.amazonaws.com.
> elb.amazonaws.com.      7092    IN      NS      ns-941.amazonaws.com.
> elb.amazonaws.com.      7092    IN      NS      ns-927.amazonaws.com.
> elb.amazonaws.com.      7092    IN      NS      ns-925.amazonaws.com.
> elb.amazonaws.com.      7092    IN      NS      ns-934.amazonaws.com.
> elb.amazonaws.com.      7092    IN      NS      ns-935.amazonaws.com.
> elb.amazonaws.com.      7092    IN      NS      ns-944.amazonaws.com.
> elb.amazonaws.com.      7092    IN      NS      ns-947.amazonaws.com.
>
> ;; Query time: 0 msec
> ;; SERVER: 127.0.0.1#53(127.0.0.1)
> ;; WHEN: Sat Jun  2 09:34:35 2012
> ;; MSG SIZE  rcvd: 504
>
> nagios:/home/fbulk#
> =========================================================
>
> =========================================================
> nagios:/home/fbulk# dig AAAA www.netflix.com
>
> ;<<>>  DiG 9.7.3<<>>  AAAA www.netflix.com
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34529
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.netflix.com.               IN      AAAA
>
> ;; AUTHORITY SECTION:
> netflix.com.            94      IN      SOA     dns.netflix.com.
> nicadmin.netflix.com. 2012060107 900 600 1209600 1800
>
> ;; Query time: 0 msec
> ;; SERVER: 127.0.0.1#53(127.0.0.1)
> ;; WHEN: Wed Jun  6 09:00:44 2012
> ;; MSG SIZE  rcvd: 82
>
> nagios:/home/fbulk#
> =========================================================
>
> Frank Bulk
>
>





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