26 Kvě
2016
26 Kvě
'16
15:19
On 26/05/16 14:22, Ondřej Surý wrote:
Hi Ondrej,
would it be perhaps possible to conduct the experiment
whether this
has a real operational impact at the root? Perhaps running Knot DNS
2.2.1 on a singular instance of the root server for a set period of time
and compare the numbers of TCP requests?
I can't answer this immediately, but I would probably test this in a lab
by replaying captured queries, rather than doing it live :)
I suspect only a few non-EDNS0 clients will switch to
TCP as
dnscache from djb is not TCP capable as far I as can remember.
Actually my recollection is that dnscache *does* fall back to TCP if it
receives a response with TC set. So dnscache instances are the most
likely to do more TCP in response to delegation responses with TC.
Regards,
Anand