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Re: 30% packet loss between cox.net and hetzner.de, possibly at tinet.net
From: "Constantine A. Murenin" <mureninc () gmail com>
Date: Fri, 5 Apr 2013 21:27:24 -0700

On 2013-W14-6 05:04 +0300, Denys Fedoryshchenko wrote:
On 2013-04-06 04:32, Constantine A. Murenin wrote:
Hello,

There has been at least a 25% packet loss between hetzner.de and
cox.net
in the last couple of hours.

Tried contacting hetzner.de, but they said it's not on their network.
This has already happened a couple of days ago, too (strangely, on
April 1),
but then was good for the rest of the week -- no problems whatsoever.

I wouldn't really care about this, if not for ssh:
it just doesn't work on such huge loss.

No other routes or networks seem affected.

Any advice?

Doesnt looks like tinet for me.

Might have been eurorings.net, as your Amazon EC2 to Hetzner 
traceroute seemed to suggest?


This loss was apparent even with their own main websites:


cox.net from a hetzner.de node:

# mtr --report{,-wide,-cycles=60} --order "SRL BGAWV" cox.net ; date
...
  3.|-- hos-bb2.juniper4.rz2.hetzner.de              60    60  0.0%    2.7   3.5   5.8  62.5  10.1
  4.|-- r1nue1.core.init7.net                        60    60  0.0%    2.8   4.2   5.2  13.5   3.8
  5.|-- r1nue2.core.init7.net                        60    60  0.0%    2.9   4.7   6.0  28.7   5.0
  6.|-- r1fra2.core.init7.net                        60    60  0.0%    5.7   7.4   8.1  15.9   3.6
  7.|-- r1fra1.core.init7.net                        60    60  0.0%    5.9   7.6   8.1  16.8   3.2
  8.|-- xe-4-2-2.fra23.ip4.tinet.net                 60    60  0.0%    5.9   6.4   7.1  36.2   5.6
  9.|-- xe-9-0-0.was14.ip4.tinet.net                 60    43 28.3%  142.3 145.0 145.2 190.0   9.6
 10.|-- cox-communications-gw.ip4.tinet.net          60    48 20.0%  124.8 129.6 130.2 176.6  13.2
 11.|-- dukedsrj02-ge210.0.rd.at.cox.net             60    45 25.0%  137.7 141.2 141.6 194.7  11.6
 12.|-- 68.1.15.238                                  60    49 18.3%  138.1 138.7 138.7 140.0   0.4
 13.|-- 68.99.123.4                                  60    36 40.0%  140.4 140.9 140.9 141.6   0.3
 14.|-- ww2.cox.com                                  60    44 26.7%  140.6 140.9 140.9 141.8   0.3
Fri Apr  5 18:19:21 PDT 2013


hetzner.de from a cox.net node:

...
  5.|-- COX-68-12-8-132-static.coxinet.net     60    60  0.0%   11.6  15.3  15.8  35.1   4.9
  6.|-- 68.1.5.161                             60    60  0.0%   55.7  59.8  60.0  95.8   5.3
  7.|-- nyk-s2-rou-1001.US.eurorings.net       60    60  0.0%   55.8  63.8  64.9 139.4  14.7
  8.|-- nntr-s1-rou-1101.FR.eurorings.net      60    60  0.0%  149.8 154.1 154.1 171.9   4.3
  9.|-- kehl-s2-rou-1103.DE.eurorings.net      60    60  0.0%  147.2 152.8 153.1 206.1   8.7
 10.|-- ffm-s1-rou-1102.DE.eurorings.net       60    60  0.0%  143.3 147.7 147.7 177.2   5.0
 11.|-- nbg-s1-rou-1001.DE.eurorings.net       60    60  0.0%  147.3 153.8 154.0 211.1  10.0
 12.|-- kpn-gw.hetzner.de                      60    44 26.7%  173.3 177.6 177.6 184.5   2.7
 13.|-- hos-bb2.juniper3.rz2.hetzner.de        60    42 30.0%  170.3 175.1 175.2 203.1   5.6
 14.|-- hos-tr4.ms-ex3k2.rz1.hetzner.de        60    44 26.7%  171.9 175.9 175.9 185.4   2.8
 15.|-- www.hetzner.de                         60    42 30.0%  170.4 175.1 175.2 187.0   4.1
Fri  5 Apr 2013 17:38:11 PDT

...
  5.|-- COX-68-12-8-132-static.coxinet.net     60    60  0.0%   11.3  14.2  14.5  33.6   3.3
  6.|-- 68.1.5.161                             60    60  0.0%   56.2  61.1  61.8 135.6  11.6
  7.|-- nyk-s2-rou-1001.US.eurorings.net       60    60  0.0%   56.0  60.6  61.0 121.1   8.7
  8.|-- nntr-s1-rou-1101.FR.eurorings.net      60    58  3.3%  150.1 153.5 153.5 166.3   2.8
  9.|-- kehl-s2-rou-1103.DE.eurorings.net      60    29 51.7%  147.5 152.0 152.1 170.8   5.3
 10.|-- ffm-s1-rou-1102.DE.eurorings.net       60    28 53.3%  143.7 148.4 148.6 186.7   8.0
 11.|-- nbg-s1-rou-1001.DE.eurorings.net       60    60  0.0%  147.2 151.8 151.9 178.2   4.7
 12.|-- kpn-gw.hetzner.de                      60    45 25.0%  172.7 177.0 177.0 197.4   4.0
 13.|-- hos-bb2.juniper3.rz2.hetzner.de        60    41 31.7%  170.4 176.5 176.6 190.9   6.2
 14.|-- hos-tr4.ms-ex3k2.rz1.hetzner.de        60    50 16.7%  171.8 175.6 175.6 183.1   2.8
 15.|-- www.hetzner.de                         60    47 21.7%  170.5 174.2 174.3 188.8   3.2
Fri  5 Apr 2013 19:22:36 PDT



But it has since subsided:

...
  3.|-- hos-bb2.juniper4.rz2.hetzner.de              60    60  0.0%    2.7   2.9   3.4  41.4   5.0
  4.|-- r1nue1.core.init7.net                        60    60  0.0%    2.8   5.2   6.3  12.4   3.8
  5.|-- r1nue2.core.init7.net                        60    60  0.0%    2.9   4.0   4.7  14.0   3.2
  6.|-- r1fra2.core.init7.net                        60    60  0.0%    5.7   7.7   8.4  17.0   3.9
  7.|-- r1fra1.core.init7.net                        60    60  0.0%    5.9   8.7   9.3  17.1   3.7
  8.|-- xe-4-2-2.fra23.ip4.tinet.net                 60    60  0.0%    5.9   6.1   6.2  15.0   1.3
  9.|-- xe-9-0-0.was14.ip4.tinet.net                 60    60  0.0%   95.9  99.4  99.8 134.3   8.9
 10.|-- cox-communications-gw.ip4.tinet.net          60    60  0.0%  100.0 100.5 100.5 104.0   0.6
 11.|-- dukedsrj02-ge210.0.rd.at.cox.net             60    60  0.0%  113.2 116.7 117.1 163.6  10.9
 12.|-- 68.1.15.238                                  60    60  0.0%  113.4 113.8 113.8 116.0   0.4
 13.|-- 68.99.123.4                                  60    50 16.7%  115.6 115.9 115.9 116.6   0.2
 14.|-- ww2.cox.com                                  60    59  1.7%  115.7 116.1 116.1 117.2   0.3
Fri Apr  5 19:46:48 PDT 2013

...
  5.|-- COX-68-12-8-132-static.coxinet.net     60    60  0.0%   11.5  16.2  16.8  57.0   6.1
  6.|-- 68.1.5.161                             60    60  0.0%   56.3  61.5  61.8 105.1   6.5
  7.|-- nyk-s2-rou-1001.US.eurorings.net       60    60  0.0%   56.6  63.9  64.6 122.2  11.0
  8.|-- nntr-s1-rou-1101.FR.eurorings.net      60    60  0.0%  150.4 157.6 158.0 226.0  11.8
  9.|-- kehl-s2-rou-1103.DE.eurorings.net      60    60  0.0%  147.7 152.5 152.7 206.0   7.7
 10.|-- ffm-s1-rou-1102.DE.eurorings.net       60    60  0.0%  143.6 150.4 150.5 184.4   7.6
 11.|-- nbg-s1-rou-1001.DE.eurorings.net       60    60  0.0%  147.7 154.6 155.2 261.1  15.2
 12.|-- kpn-gw.hetzner.de                      60    60  0.0%  148.0 153.1 153.2 175.2   4.2
 13.|-- hos-bb2.juniper3.rz2.hetzner.de        60    60  0.0%  145.0 164.8 166.2 220.6  22.2
 14.|-- hos-tr4.ms-ex3k2.rz1.hetzner.de        60    59  1.7%  145.8 152.5 152.6 166.7   4.4
 15.|-- www.hetzner.de                         60    58  3.3%  144.5 149.7 149.7 161.3   3.9
Fri  5 Apr 2013 20:53:59 PDT


With the end-to-end working, too.


Cheers,
Constantine.


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