Cogent packet loss to Verizon in San Jose

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1

Anyone from Cogent around? Normal support channels aren't getting me
anywhere.

We have been seeing consistent packet loss to Verizon over Cogent in San
Jose for several days:

HOST: noc-auth1.garlic.com Loss% Snt
Last Avg Best Wrst StDev
  1. router.garlic.com 0.0% 10 0.4
0.3 0.2 0.4 0.0
  2. vl203.mag03.sfo01.atlas.cogentco.com 0.0% 10 2.2
2.3 2.1 2.4 0.1
  3. te0-2-0-1.mpd21.sfo01.atlas.cogentco.com 0.0% 10 2.6
2.6 2.4 2.8 0.1
  4. be2166.ccr21.sjc01.atlas.cogentco.com 0.0% 10 3.9
3.9 3.7 4.2 0.1
  5. be2000.ccr21.sjc03.atlas.cogentco.com 0.0% 10 4.7
4.4 4.3 4.7 0.1
  6. verizon.sjc03.atlas.cogentco.com 40.0% 10 80.0
80.8 79.9 81.8 0.7
  7. so-1-0-0-0.SJC01-CORE-RTR1.verizon-gni.net 30.0% 10 82.2
87.9 81.1 114.6 11.3
  8. A8-0-1710.SNFCCA-DSL-01.verizon-gni.net 30.0% 10 83.2
83.8 82.1 85.9 1.3
  9. static-71-116-125-210.snfcca.dsl-w.verizon.net 20.0% 10 108.1
107.2 105.7 108.7 1.1

We have had to route some customer's traffic out through our alternate
provider (AS20115), as their VPN's were borked by the packet loss.

Thanks,
-Bobby

2

This has been going on nationwide between Cogent and other peering partners since early 2013 (and in some cases before), but especially between Cogent and Verizon. It's not a technical problem, but a political one.

We resolved our issue by working with our upsteam providers to reconfigure our routing and advertisements to avoid cogent, otherwise, I don't think there is any solution coming within a reasonable timeframe

3

Issues in NYC today too. We confirmed traffic coming in from VZW as well as Comcast through Cogent to us both seeing drops at that same point.

Matthew Shaw - Sr. Network Administrator
FairPoint Communications | mshaw@fairpoint.com

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