<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" "http://www.w3.org/TR/REC-html40/strict.dtd">
<html><head><meta name="qrichtext" content="1" /><style type="text/css">
p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'LVC Sans'; font-size:12pt; font-weight:400; font-style:normal;">
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">When I do an mtr from my home to Wikipedia, the host ae20.3518.ear1.Chicago3.level3.net shows a significant packet loss:</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; "> </p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><span style=" font-family:'monospace'; font-size:0.92em; color:#000000; background-color:#ffffff;"> My traceroute [v0.92] </span><span style=" font-family:'monospace'; font-size:0.92em;"><br />laptop (192.168.1.1) 2023-07-06T23:29:23-0500 <br />Keys: Help Display mode Restart statistics Order of fields quit <br /> Packets Pings <br />Host Loss% Snt Last Avg Best Wrst <br />1. gateway 0.0% 21 0.4 0.4 0.3 0.4 <br />2. (ip address redacted) 0.0% 21 8.8 9.0 8.0 11.6 <br />3. rc2nr-be103-1.wp.shawcable.net 0.0% 20 8.9 9.4 8.5 10.1 <br />4. 24.244.61.17 0.0% 20 9.9 9.9 8.4 12.1 <br />5. 24.244.60.173 0.0% 20 9.4 9.7 8.9 11.3 <br />6. rc2nr-be1.wp.shawcable.net 0.0% 20 9.9 9.4 8.4 10.2 <br />7. rc3sc-be26.wp.shawcable.net 0.0% 20 9.8 10.0 9.0 12.3 <br />8. rc4ec-be25-1.il.shawcable.net 0.0% 20 26.2 25.4 24.1 28.2 <br />9. lag-104.ear5.Chicago2.Level3.net 0.0% 20 25.3 25.3 23.9 28.8 <br />10. ae20.3518.ear1.Chicago3.level3.net 78.9% 20 26.9 25.6 24.2 26.9 <br />11. WIKIMEDIA-F.ear1.Chicago3.Level3.net 0.0% 20 24.9 25.5 24.2 27.5 <br />12. xe-5-2-1.cr2-codfw.wikimedia.org 0.0% 20 74.3 75.2 73.5 77.8 <br />13. text-lb.codfw.wikimedia.org 0.0% 20 74.5 73.7 69.4 76.7<br /></span><span style=" font-family:'monospace';"><br /></span>What I suspect is happening is only ICMP packets are being lost, not every packet going through that host, since Wikipedia doesn't seem to have degraded performance. Anyone care to offer other explanations or speculation?</p>
<p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; "> </p>
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Brian</p></body></html>