[atlas] raspbian.net/raspbian.org ipv6 peering problems

On Tue, Jun 25, 2019 at 09:58:25AM +0200,
 Thomas Schäfer <tschaefer at t-online.de> wrote 
 a message of 17 lines which said:

> Does someone measurements to the server of "raspbian"?

Indeed, it's not perfect (the sad state of IPv6 connectivity):

% blaeu-reach --requested 100 --by_probe 2001:41c9:1:3ce::1:10
99 probes reported
Test #22099153 done at 2019-06-25T10:03:22Z
Tests: 86 successful probes (86.9 %), 13 failed (13.1 %), average RTT: 71 ms

Comparison with a server with good connectivity (F.root-servers.net):

% blaeu-reach --requested 100 --by_probe --old_measurement 22099153  2001:500:2f::f
Warning: --requested=100 ignored since a list of probes was requested
99 probes reported
Test #22099157 done at 2019-06-25T10:06:11Z
Tests: 99 successful probes (100.0 %), 0 failed (0.0 %), average RTT: 39 ms