>Stinks of delays in the (failing) reverse DNS lookup.
>What happens if you do 'ping6 -n ....'

ping6 -n doesn't seem to make a difference.

Can anyone else reproduce it with a newer NetBSD release (1.5.3
or 1.6) or a different platform than macppc?

Pinging sup with no other ipv6 network traffic.

  $ping6 -n -c 6 sup.netbsd.org
  PING6(56=40+8+8 bytes) 2002::1 --> 3ffe::6563
  16 bytes from 3ffe::6563, icmp_seq=0 hlim=60 time=1223.7 ms
  16 bytes from 3ffe::6563, icmp_seq=1 hlim=60 time=217.241 ms
  16 bytes from 3ffe::6563, icmp_seq=2 hlim=60 time=1214.44 ms
  16 bytes from 3ffe::6563, icmp_seq=3 hlim=60 time=214.9 ms
  16 bytes from 3ffe::6563, icmp_seq=4 hlim=60 time=1273.8 ms
  16 bytes from 3ffe::6563, icmp_seq=5 hlim=60 time=274.258 ms

Pinging sup while a ping6 flood is occuring to the stf0 interface.

  $ping6 -n -c 6 sup.netbsd.org
  PING6(56=40+8+8 bytes) 2002::1 --> 3ffe::6563
  16 bytes from 3ffe::6563, icmp_seq=0 hlim=60 time=216.308 ms
  16 bytes from 3ffe::6563, icmp_seq=1 hlim=60 time=216.063 ms
  16 bytes from 3ffe::6563, icmp_seq=2 hlim=60 time=215.633 ms
  16 bytes from 3ffe::6563, icmp_seq=3 hlim=60 time=215.436 ms
  16 bytes from 3ffe::6563, icmp_seq=4 hlim=60 time=227.085 ms
  16 bytes from 3ffe::6563, icmp_seq=5 hlim=60 time=218.22 ms

-- 
John D. Smerdon;  Livonia, Michigan, USA;  Contents are my opinion.
Home: jds@smerdon.livonia.mi.us http://www.smerdon.org/