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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;"><span style="color: rgb(0, 51, 102); font-family: 'Times New Roman'; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none;"><font color="000000">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.<br>
<br>
Two traces below from the same origin to the same destination at the same time, one is ICMP and one is UDP.<br>
<br>
It is not just traceroute ICMP packets, we cannot ping our own equipment when it takes a Level3 path. Other UDP/TCP traffic so far seems unaffected.</font><br>
<br>
<font color="000000">Is anyone else seeing this? This appears to be a Chicago-area connection.</font><br>
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<br>
<br>
<br>
Using ICMP to trace to:</span>
<p style="color: rgb(0, 51, 102); font-family: 'Times New Roman'; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">
<b>204.11.209.66</b></p>
<pre style="color: rgb(0, 51, 102); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Tracing to host 204.11.209.66
traceroute to 204.11.209.66 (204.11.209.66), 30 hops max, 60 byte packets
1 216.17.34.1 (216.17.34.1) [as10242/AS10242] 0.558 ms 0.554 ms 0.552 ms
2 v103.usi-cr02-mpls.usinternet.com (216.17.36.25) [as10242/AS10242] 1.094 ms 1.199 ms 1.555 ms
3 10gigabitethernet2-6.core1.msp1.he.net (216.66.73.173) [AS6939] 1.203 ms 1.530 ms 1.533 ms
4 100gigabitethernet7-1.core1.chi1.he.net (184.105.223.177) [AS46841] 9.076 ms 9.084 ms 9.154 ms
5 chi-bb1-link.telia.net (213.248.104.213) [AS1299] 9.155 ms 9.163 ms 9.163 ms
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
</pre>
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<br>
<br>
<span style="color: rgb(0, 51, 102); font-family: 'Times New Roman'; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255); display: inline !important; float: none;">Using
UDP to trace to:</span>
<p style="color: rgb(0, 51, 102); font-family: 'Times New Roman'; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">
<b>204.11.209.66</b></p>
<pre style="color: rgb(0, 51, 102); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Tracing to host 204.11.209.66
traceroute to 204.11.209.66 (204.11.209.66), 30 hops max, 60 byte packets
1 216.17.34.1 (216.17.34.1) [as10242/AS10242] 0.438 ms 0.480 ms 0.495 ms
2 v103.usi-cr02-mpls.usinternet.com (216.17.36.25) [as10242/AS10242] 1.106 ms 1.166 ms 1.235 ms
3 10gigabitethernet2-6.core1.msp1.he.net (216.66.73.173) [AS6939] 4.447 ms 4.445 ms 4.440 ms
4 100gigabitethernet7-1.core1.chi1.he.net (184.105.223.177) [AS46841] 12.821 ms 12.898 ms 12.893 ms
5 chi-bb1-link.telia.net (213.248.104.213) [AS1299] 9.056 ms 9.052 ms 9.054 ms
6 level3-ic-300135-chi-bb1.c.telia.net (213.248.87.238) [AS1299] 23.943 ms 24.000 ms 18.147 ms
7 ae-32-52.ebr2.Chicago1.Level3.net (4.69.138.62) [AS3356] 20.890 ms 18.162 ms 18.189 ms
8 ae-5-5.ebr2.Chicago2.Level3.net (4.69.140.194) [AS3356] 20.993 ms 20.982 ms 22.160 ms
9 ae-22-52.car2.Chicago2.Level3.net (4.69.138.165) [AS3356] 18.164 ms 22.165 ms 18.231 ms
10 RED-ANVIL-L.car2.Chicago2.Level3.net (4.30.14.162) [AS3356] 44.853 ms 44.822 ms 44.810 ms
11 ge-1-0-1-0.cr1.noc.ip.redanvil.net (204.15.100.173) [AS33693] 19.849 ms 19.888 ms 19.797 ms</pre>
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