[outages] Level3 ICMP Filtering in Chicago?

[Nate Carlson]

On Mon, 30 Sep 2013, Justin Krejci wrote:
> At about 3:30PM central time today we started seeing ICMP packet loss 
> going into Level3 networks, we believe it is likely some sort of Level3 
> filtering of some sort.
>
> Using ICMP to trace to:
>
> 204.11.209.66

With direct connectivity to Level3 in Minneapolis (which transits Chicago 
for, well, everything), it appears to be working..

$ traceroute -I 204.11.209.66
traceroute to 204.11.209.66 (204.11.209.66), 30 hops max, 60 byte packets
  4  ae-11-11.car1.Minneapolis1.Level3.net (4.69.136.101)  38.164 ms  38.218 ms  38.289 ms
  5  4.69.201.82 (4.69.201.82)  8.940 ms  8.939 ms  8.936 ms
  6  ae-12-51.car2.Chicago2.Level3.net (4.69.138.133)  9.063 ms  9.005 ms  9.054 ms
  7  RED-ANVIL-L.car2.Chicago2.Level3.net (4.30.14.162)  9.311 ms  9.281 ms  9.277 ms
  8  ge-1-0-1-0.cr1.noc.ip.redanvil.net (204.15.100.173)  11.838 ms  11.917 ms  11.908 ms
  9  204.11.209.66 (204.11.209.66)  11.894 ms  11.944 ms  11.933 ms