Comment 380 for bug 417757

Created attachment 362819
Capture of dns trafic while wget

Capture of dns trafic while wget lwn.net with fedora11+normal updates
provider is orange/france telecom. dns server looks like it's the ip of the livebox (there is several millions of users behind a livebox I think)

wget a little more than 10s
real 0m10.922s
user 0m0.005s
sys 0m0.013s

dns capture gives :
Fedora send two request , one A and one AAAA
answer for A is given at once
after 5s, retry of A (why ? we already have received the result ...)
answer with A immediately
then retry of AAAA, this time after the A answer come

after 10s, there is no dns trafic but wget decides to get the page (it was resolving host before)

after15s and 20s, the dns server timeout the aaaa answer

this looks timing related and dependant on the behaviour of the dns server as the same pc has a different behaviour when connecting to another provider.
as the dns answer immediately with a good ip,why is the linux waiting for so long ?

so my questions :
is the linux correctly getting the first A answer or is it rejecting it (believing it to the be an anwser not matching for the aaaa) ?
what are the timing used ?