The congestion might be on the reverse path. Can you get a trace route in the opposite direction?
Thanks. On Fri, Feb 4, 2022, 7:55 AM Lukas Tribus via Outages <[email protected]> wrote: > Dear list, > > > There is major congestion for 8 - 10 hours every day on the GTT > network from Frankfurt, Germany towards Milan, Italy. > > Before noon (localtime, that would be 1200~1300Z) things are looking > fine but in the afternoon, packet-loss and latency increase steadily > (peaking in the evening). We are talking packet-loss in excess of 10% > and ten times the expected latency: > > lukas@htznr2:~$ mtr 62.10.128.1 -wrs1000 -c1000 > Start: 2022-02-03T21:33:28+0100 > > HOST: htznr2 Loss% Snt Last > Avg Best Wrst StDev > 1.|-- _gateway 0.0% 1000 3.1 > 4.9 2.3 18.0 1.3 > 2.|-- 10114.your-cloud.host 0.0% 1000 0.2 > 0.3 0.2 4.0 0.2 > 3.|-- ??? 100.0 1000 0.0 > 0.0 0.0 0.0 0.0 > 4.|-- 85-10-250-153.clients.your-server.de 0.0% 1000 1.3 > 4.8 0.8 98.6 11.8 > 5.|-- spine12.cloud1.nbg1.hetzner.com 0.0% 1000 1.1 > 4.8 0.8 66.8 11.4 > 6.|-- 213-239-239-121.clients.your-server.de 0.0% 1000 3.0 > 2.3 0.5 43.4 4.1 > 7.|-- core1.fra.hetzner.com 0.0% 1000 3.6 > 5.7 3.5 65.2 5.0 > 8.|-- ae18.cr6-fra2.ip4.gtt.net 0.0% 1000 4.8 > 5.8 3.6 116.7 6.7 > 9.|-- et-5-1-0.cr0-mil2.ip4.gtt.net 11.1% 1000 114.0 > 112.3 63.5 172.7 13.4 > 10.|-- tiscali.ip4.gtt.net 11.5% 1000 111.5 > 113.4 64.3 148.8 13.2 > 11.|-- static-94-32-126-81.clienti.tiscali.it 10.6% 1000 121.7 > 126.4 79.8 162.9 13.7 > 12.|-- static-94-32-135-162.clienti.tiscali.it 11.2% 1000 119.1 > 126.8 80.9 176.8 13.9 > 13.|-- static-94-32-135-182.clienti.tiscali.it 11.3% 1000 119.0 > 127.6 79.5 171.2 14.2 > 14.|-- static-213-205-54-210.clienti.tiscali.it 78.7% 1000 130.1 > 125.3 73.8 228.1 16.2 > 15.|-- ??? 100.0 1000 0.0 > 0.0 0.0 0.0 0.0 > lukas@htznr2:~$ > > > > 2022-02-01T18:10:07Z > https://pastebin.com/raw/MSvuSuR0 > > 2022-02-02T17:39:44Z > https://pastebin.com/raw/zWD8GHGa > > 2022-02-03T20:33:28Z (as above) > https://pastebin.com/raw/DHWDyi1g > > 2022-02-04T13:11:51Z > https://pastebin.com/raw/qhrWZBQX > > > GTT NOC has been advised Feb 1st, 18:000Z, but apparently they always > verify network issues in the morning, which is also when those links > are uncongested, so at this point there is no confirmation from them. > I'm assuming the network teams are aware of it anyway, but we don't > know for sure. If you are using GTT for transit in Europe and traffic > to Italy matters to your customers, you probably want to reroute (for > example: reducing loc-pref based on GTT's BGP community 3257:53900 for > prefixes learned in Italy). > > > cheers, > lukas > _______________________________________________ > Outages mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/outages >
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