problem with www.xbox.com / akamai

[niels=cluenet at bakker.net]

A slight correction to what I wrote: of course empty responses aren't 
cached so this doesn't break v4 access when you ask for v6 first.  The 
impact is limited to significantly shifting hits to www.xbox.com to 
IPv4 where they could have had more IPv6 traffic.


	-- Niels.

-- 

For illustration.  The commands below were entered a few seconds apart.
Your .akamaiedge.net host will likely vary from the one returned below:

% ping6 www.xbox.com
ping6: Non-recoverable failure in name resolution
% ping www.xbox.com
PING e2820.dspb.akamaiedge.net (172.229.187.141): 56 data bytes
64 bytes from 172.229.187.141: icmp_seq=0 ttl=59 time=2.577 ms
^C
--- e2820.dspb.akamaiedge.net ping statistics ---
1 packets transmitted, 1 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 2.577/2.577/2.577/0.000 ms
% ping6 www.xbox.com
PING6(56=40+8+8 bytes) 2001:610:600:a33::2 --> 2a02:26f0:6b:1a0::b04
16 bytes from 2a02:26f0:6b:1a0::b04, icmp_seq=0 hlim=58 time=3.747 ms
16 bytes from 2a02:26f0:6b:1a0::b04, icmp_seq=1 hlim=58 time=3.579 ms
^C
--- e2820.dspb.akamaiedge.net ping6 statistics ---
2 packets transmitted, 2 packets received, 0.0% packet loss
round-trip min/avg/max/std-dev = 3.579/3.663/3.747/0.084 ms

% _