From my network at home the output from the mtr-command is acting a bit strange. The output become longer and longer and longer, and some of the addresses is repeated several times. Here's an example of what happens when I issue the command $~: mtr www.cisco.com Code: My traceroute [v0.72] ACME (0.0.0.0) Sun May 4 20:08:00 2008 Keys: Help Display mode Restart statistics Order of fields quit Packets Pings Host Loss% Snt Last Avg Best Wrst StDev 1. 192.168.2.1 0.0% 24 1.9 2.1 1.1 13.8 2.6 2. 192.168.1.1 0.0% 24 2.8 2.4 1.9 3.2 0.4 3. 194.19.98.129 95.7% 24 22.4 22.4 22.4 22.4 0.0 4. 195.204.200.13 4.2% 24 29.4 24.3 16.6 36.2 5.2 5. 194.19.81.37 0.0% 24 36.5 32.1 19.3 48.7 6.7 195.204.200.13 6. oso-b2-link.telia.net 8.7% 24 25.7 33.6 25.1 67.1 10.3 7. kbn-bb1-link.telia.net 8.7% 23 39.7 38.1 4.8 58.1 10.1 oso-b2-link.telia.net 8. nyk-bb1-link.telia.net 21.7% 23 327.3 154.5 5.4 604.2 125.9 sjck-dmzbb-gw1.cisco.com kbn-bb1-link.telia.net Cisco-Systems-1152786.cust-rtr.pacbell.net 9. ded4-g8-3-0.sntc01.pbi.net 56.5% 23 86.2 160.3 79.2 552.1 162.6 nyk-bb1-link.telia.net sjc12-dmzbb-gw1-gig1-42.cisco.com 10. nyk-b2-link.telia.net 95.5% 23 17.2 17.2 17.2 17.2 0.0 11. ex2-tg4-0.eqnwnj.sbcglobal.net 54.5% 23 53.4 35.6 17.2 53.4 11.2 nyk-b2-link.telia.net 12. Cisco-Systems-1152786.cust-rtr.pacbell. 13.0% 23 29.9 35.2 7.0 208.9 44.0 ex2-tg4-0.eqnwnj.sbcglobal.net nyk-b2-link.telia.net 13. sjck-dmzbb-gw1.cisco.com 8.7% 23 53.9 186.7 53.9 1319. 263.2 Cisco-Systems-1152786.cust-rtr.pacbell.net ded4-g8-3-0.sntc01.pbi.net ex2-tg4-0.eqnwnj.sbcglobal.net 14. sjck-dmzbb-gw1.cisco.com 72.7% 23 204.6 282.4 79.1 1032. 372.3 ded4-g8-3-0.sntc01.pbi.net ex2-tg4-0.eqnwnj.sbcglobal.net 15. sjc12-dmzbb-gw1-gig1-42.cisco.com 91.3% 23 84.0 44.5 5.1 84.0 55.8 ded4-g8-3-0.sntc01.pbi.net 16. 194.19.98.129 63.6% 23 22.9 120.1 7.9 726.1 245.5 Cisco-Systems-1152786.cust-rtr.pacbell.net ded4-g8-3-0.sntc01.pbi.net 17. sjc12-dmzbb-gw1-gig1-42.cisco.com 9.1% 23 23.2 89.1 4.7 1398. 308.6 ded4-g8-3-0.sntc01.pbi.net Cisco-Systems-1152786.cust-rtr.pacbell.net ex2-tg4-0.eqnwnj.sbcglobal.net 18. sjck-dmzbb-gw1.cisco.com 8.7% 23 20.2 35.1 5.0 223.8 48.4 sjc12-dmzbb-gw1-gig1-42.cisco.com 19. 194.19.98.129 13.0% 23 18.9 231.5 4.7 1006. 289.5 sjck-dmzbb-gw1.cisco.com Cisco-Systems-1152786.cust-rtr.pacbell.net 194.19.81.37 ex2-tg4-0.eqnwnj.sbcglobal.net 20. kbn-bb1-link.telia.net 17.4% 23 486.5 750.0 70.8 2906. 712.0 sjck-dmzbb-gw1.cisco.com 194.19.98.129 nyk-b2-link.telia.net ex2-tg4-0.eqnwnj.sbcglobal.net sjc12-dmzbb-gw1-gig1-42.cisco.com ded4-g8-3-0.sntc01.pbi.net 21. kbn-bb1-link.telia.net 81.8% 23 1653. 780.0 18.8 1653. 686.0 ex2-tg4-0.eqnwnj.sbcglobal.net sjc12-dmzbb-gw1-gig1-42.cisco.com oso-b2-link.telia.net 22. 194.19.98.129 90.5% 22 413.6 441.1 413.6 468.6 38.9 23. 194.19.98.129 95.2% 22 347.1 347.1 347.1 347.1 0.0 24. 194.19.98.129 95.2% 22 344.9 344.9 344.9 344.9 0.0 25. 194.19.98.129 95.0% 21 317.3 317.3 317.3 317.3 0.0 26. Cisco-Systems-1152786.cust-rtr.pacbell. 94.7% 20 779.8 779.8 779.8 779.8 0.0 27. ex2-tg4-0.eqnwnj.sbcglobal.net 94.7% 20 1757. 1757. 1757. 1757. 0.0 28. ??? The IP address 194.19.98.129 is repeated several times. This is an address that belongs to my ISP. Is this a routing loop, or could there be other explanations ?
