Naveen Kottapalli <naveen.sa...@gmail.com> writes: > Can one of you tell why would a v4 client send AAAA query or a by client send > a > A query when the resolved address cannot be used?
As others have pointed out it's very common. As an example, I looked at all the requests arriving to a root server in the DITL data for 2019-04-10 and found: | IPv | | | | |-----+------------------+------------+---------| | 6 | count of all v6: | 328328681 | | | 6 | requesting A | 169375042 | 0.51587 | | 6 | requesting AAAA | 121834127 | 0.37107 | | 4 | count of all v4: | 2997023565 | | | 4 | count of A | 1593723264 | 0.53177 | | 4 | count of AAAA | 326232540 | 0.10885 | So you can see that of all the ipv4 clients, 53% were asking for A records and 10.8% were asking for AAAA (the other requests were for other types, eg DNSKEY/SOA/etc). In the IPV6 space, it's even more interesting that 51.6% of IPv6 clients were asking about A records, and only 37% about AAAA! -- Wes Hardaker USC/ISI _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
