Lorenzo Colitti schreef op 16-4-2015 om 2:57:
For the avoidance of mystery: Google performs measurements of IPv6
connectivity and latency on an ongoing basis. The Google DNS servers
do not return AAAA records to DNS resolvers if our measurements
indicate that for users of those resolvers, HTTP/HTTPS access to
dual-stack Google services is substantially worse than to equivalent
IPv4-only services. "Worse" covers both reliability (e.g., failure to
load a URL) and latency (e.g., IPv6 is 100ms worse than IPv4 because
it goes over an ocean). The resolvers must also have a minimum query
volume, which is fairly low.
A free hint to Google to help the industry:
If a network engineer could prove to have control of the DNS in a
network by adding some record (txt?) that Google would verify, a account
could be created at google which would provide a list of IPs causing the
trouble.
That would help the network team to find the users causing the AAAA
blacklisting and fix the issue. And that would help Google too. A win win?
Or did I misunderstand something?
Dave
