We have received a report of similar issues today. The client has servers with us in several locations where we use nLayer and/or PacketExchagne and his monitoring system is on a network that uses Cox as its preferred upstream. He shutdown his Cox upstream and didn’t have any issues reaching the servers over his backup provider. The issues were sporadic and did not affect all protocols – ICMP pings worked, snmpwalk was fine, but UDP traces were dying somewhere on the reverse path. Seems to be very similar to what you are seeing. From: outages-bounces@outages.org [mailto:outages-bounces@outages.org] On Behalf Of Brandon Whaley Sent: Wednesday, December 19, 2012 4:25 PM To: outages@outages.org Subject: [outages] Cox -> nLayer connectivity issues We've been seeing intermittent TCP/UDP connectivity issues from Cox Communications in Virginia to any location that routes over nLayer. UDP traceroutes are fine, but DNS lookups time out for minutes at a time, then work again for ~5 minutes before repeating the problem. ICMP is never affected during the outages. traceroute to 198.46.80.1 (198.46.80.1), 30 hops max, 60 byte packets 1 router36f24c.local (192.168.14.1) 0.560 ms 0.531 ms 0.753 ms 2 wsip-174-77-92-169.hr.hr.cox.net<http://wsip-174-77-92-169.hr.hr.cox.net> (174.77.92.169) 2.532 ms 2.581 ms 3.009 ms 3 172.21.224.153 (172.21.224.153) 3.995 ms 4.067 ms 4.111 ms 4 172.21.249.101 (172.21.249.101) 4.185 ms 4.396 ms 4.561 ms 5 172.21.249.73 (172.21.249.73) 4.916 ms 4.900 ms 5.128 ms 6 172.21.249.18 (172.21.249.18) 5.517 ms 5.124 ms 5.043 ms 7 ip-216-54-33-22.coxfiber.net<http://ip-216-54-33-22.coxfiber.net> (216.54.33.22) 210.486 ms 210.477 ms 210.466 ms 8 68.1.4.139 (68.1.4.139) 221.950 ms 222.460 ms 232.268 ms 9 * xe-5-0-7.ar1.iad1.us.nlayer.net<http://xe-5-0-7.ar1.iad1.us.nlayer.net> (69.31.10.81) 226.332 ms 226.866 ms 10 as54641.xe-9-0-1.ar1.iad1.us.nlayer.net<http://as54641.xe-9-0-1.ar1.iad1.us.nlayer.net> (69.31.31.42) 223.718 ms 225.083 ms 225.744 ms 11 198.46.80.1 (198.46.80.1) 225.706 ms 226.670 ms 226.698 ms Is anyone with Cox on the list that can investigate/contact me? -- Best Regards, Brandon W.