problem with / akamai

niels=cluenet at niels=cluenet at
Sat Jun 14 19:16:01 CEST 2014

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 to 
IPv4 where they could have had more IPv6 traffic.

	-- Niels.


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

% ping6
ping6: Non-recoverable failure in name resolution
% ping
PING ( 56 data bytes
64 bytes from icmp_seq=0 ttl=59 time=2.577 ms
--- 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
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
--- 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

% _

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