traceroute: Warning: ckecksums disabled traceroute to www.cas.ac.cn (159.226.2.10), 30 hops max, 40 byte packets pingroute.pl version 1.8, 3/1/01 found 24 hops in route from host to www.cas.ac.cn 2 RTR-MSFC-DMZ.SLAC.Stanford.EDU (134.79.135.21) 0.618 ms 3 192.68.191.83 (192.68.191.83) 0.561 ms 4 STAN.POS.calren2.NET (171.64.1.213) 0.603 ms 5 SUNV--STAN.POS.calren2.net (198.32.249.73) 0.907 ms 6 abilene--QSV.POS.calren2.net (198.32.249.162) 1.004 ms 7 scrm-snva.abilene.ucaid.edu (198.32.8.70) 4.000 ms 8 dnvr-scrm.abilene.ucaid.edu (198.32.8.2) 25.715 ms 9 kscy-dnvr.abilene.ucaid.edu (198.32.8.14) 36.235 ms 10 ipls-kscy.abilene.ucaid.edu (198.32.8.6) 45.563 ms 11 st-abilene.startap.net (206.220.240.205) 49.915 ms 12 * {router at hop 12 202.112.61.5 gave no response this time since packet lost} 13 202.112.61.222 (202.112.61.222) 772.173 ms 14 202.112.36.242 (202.112.36.242) 1034.759 ms 15 202.112.1.62 (202.112.1.62) 1226.712 ms 16 beijing-sgw-lan.cernet.net (202.112.1.202) 1238.566 ms 17 202.112.53.6 (202.112.53.6) 1115.547 ms 18 * 19 * 20 * 21 159.226.254.145 (159.226.254.145) 640.748 ms 22 159.226.254.142 (159.226.254.142) 471.392 ms 23 159.226.254.70 (159.226.254.70) 556.150 ms 24 159.226.2.10 (159.226.2.10) 445.486 ms The routers 202.112.0.0 are part of AS4538 - CERNET The routers in 159.226 are in AS1239 - Institute of Computing Technology Chinese Academy of Sciences If you ping the routers along the route then it appears the packet losses start at at hop 13: pings/node=100 100 byte packets 1400 byte packets NODE %loss min max avg %loss min max avg from host 134.79.135.21 RTR-MSFC-DMZ.SLAC.STANFORD.EDU 0% 0.0 80.0 0.0 0% 1.0 22.0 1.0 Mon Mar 19 19:07:56 PST 2001 192.68.191.83 192.68.191.83 0% 0.0 0.0 0.0 0% 1.0 21.0 1.0 Mon Mar 19 19:11:14 PST 2001 171.64.1.213 STAN.POS.CALREN2.NET 0% 0.0 1.0 0.0 0% 1.0 6.0 1.0 Mon Mar 19 19:14:32 PST 2001 198.32.249.73 SUNV--STAN.POS.CALREN2.NET 0% 42.0 43.0 42.0 0% 44.0 60.0 44.0 Mon Mar 19 19:17:51 PST 2001 198.32.249.162 ABILENE--QSV.POS.CALREN2.NET 0% 42.0 43.0 42.0 0% 44.0 45.0 44.0 Mon Mar 19 19:21:09 PST 2001 198.32.8.70 SCRM-SNVA.ABILENE.UCAID.EDU 0% 3.0 43.0 4.0 0% 5.0 29.0 5.0 Mon Mar 19 19:24:27 PST 2001 198.32.8.2 DNVR-SCRM.ABILENE.UCAID.EDU 0% 25.0 103.0 26.0 0% 26.0 43.0 26.0 Mon Mar 19 19:27:46 PST 2001 198.32.8.14 KSCY-DNVR.ABILENE.UCAID.EDU 0% 36.0 50.0 36.0 0% 37.0 49.0 37.0 Mon Mar 19 19:31:04 PST 2001 198.32.8.6 IPLS-KSCY.ABILENE.UCAID.EDU 0% 45.0 46.0 45.0 0% 46.0 50.0 46.0 Mon Mar 19 19:34:22 PST 2001 206.220.240.205 ST-ABILENE.STARTAP.NET 0% 50.0 253.0 57.0 0% 51.0 261.0 56.0 Mon Mar 19 19:26:42 PST 2001 202.112.61.222 202.112.61.222 11% 780.0 4331.0 912.0 13% 725.0 1035.0 847.0 Mon Mar 19 19:30:00 PST 2001 202.112.36.242 202.112.36.242 23% 704.0 1002.0 755.0 28% 723.0 927.0 739.0 Mon Mar 19 19:33:28 PST 2001 202.112.1.62 202.112.1.62 21% 704.0 939.0 724.0 28% 726.0 919.0 743.0 Mon Mar 19 19:36:50 PST 2001 202.112.1.202 BEIJING-SGW-LAN.CERNET.NET 13% 704.0 735.0 713.0 25% 725.0 757.0 735.0 Mon Mar 19 19:40:10 PST 2001 202.112.53.6 202.112.53.6 50% 704.0 1400.0 735.0 100% 0.0 0.0 0.0 Mon Mar 19 19:43:30 PST 2001 159.226.254.145 159.226.254.145 13% 147.0 469.0 201.0 32% 448.0 800.0 492.0 Mon Mar 19 19:47:00 PST 2001 159.226.254.142 159.226.254.142 96% 429.0 466.0 449.0 100% 0.0 0.0 0.0 Mon Mar 19 19:50:20 PST 2001 159.226.254.70 159.226.254.70 0% 201.0 213.0 202.0 3% 207.0 270.0 208.0 Mon Mar 19 19:53:49 PST 2001 159.226.2.10 159.226.2.10 0% 200.0 205.0 201.0 0% 211.0 213.0 211.0 Mon Mar 19 19:57:09 PST 2001 A later pingroute appears as follows: 23cottrell@host :~>bin/pingroute.pl -c 100 -i 11 www.cas.ac.cn Tue Mar 20 07:28:09 2001 Architecture=SUN5, commands=traceroute -q 1 and ping -s www.cas.ac.cn 1400 100 pingroute.pl version=1.8, 3/1/01. Author cottrell@slac.stanford.edu, debug=1 using traceroute to get nodes in route from host (w.x.y.z) to www.cas.ac.cn starting at node 11 traceroute: Warning: ckecksums disabled traceroute to www.cas.ac.cn (159.226.2.10), 30 hops max, 40 byte packets pingroute.pl version 1.8, 3/1/01 found 24 hops in route from host to www.cas.ac.cn 1 router (w.x.y.z) 0.674 ms 2 RTR-MSFC-DMZ.SLAC.Stanford.EDU (134.79.135.21) 0.628 ms 3 192.68.191.83 (192.68.191.83) 0.553 ms 4 STAN.POS.calren2.NET (171.64.1.213) 0.565 ms 5 SUNV--STAN.POS.calren2.net (198.32.249.73) 0.882 ms 6 abilene--QSV.POS.calren2.net (198.32.249.162) 0.900 ms 7 scrm-snva.abilene.ucaid.edu (198.32.8.70) 3.864 ms 8 dnvr-scrm.abilene.ucaid.edu (198.32.8.2) 25.641 ms 9 kscy-dnvr.abilene.ucaid.edu (198.32.8.14) 36.224 ms 10 ipls-kscy.abilene.ucaid.edu (198.32.8.6) 45.335 ms 11 st-abilene.startap.net (206.220.240.205) 49.823 ms 12 * 13 202.112.61.222 (202.112.61.222) 1164.191 ms 14 202.112.36.242 (202.112.36.242) 1158.713 ms 15 202.112.1.62 (202.112.1.62) 1078.854 ms 16 beijing-sgw-lan.cernet.net (202.112.1.202) 1137.399 ms 17 202.112.53.6 (202.112.53.6) 1158.250 ms 18 * 19 * 20 * 21 159.226.254.145 (159.226.254.145) 581.624 ms 22 159.226.254.142 (159.226.254.142) 634.858 ms 23 159.226.254.70 (159.226.254.70) 683.731 ms 24 159.226.2.10 (159.226.2.10) 769.736 ms Wrote 24 addresses to /tmp/pingaddr, now ping each address 100 times from host starting at hop 11 pings/node=100 100 byte packets 1400 byte packets NODE %loss min max avg %loss min max avg from host 206.220.240.205 ST-ABILENE.STARTAP.NET 0% 50.0 515.0 72.0 0% 51.0 228.0 57.0 Tue Mar 20 07:28:46 PST 2001 202.112.61.222 202.112.61.222 26% 973.0 1315.0 1148.0 30% 879.0 1408.0 1159.0 Tue Mar 20 07:32:04 PST 2001 202.112.36.242 202.112.36.242 12% 706.0 1162.0 942.0 32% 765.0 1204.0 1110.0 Tue Mar 20 07:35:26 PST 2001 202.112.1.62 202.112.1.62 18% 798.0 1314.0 1122.0 9% 721.0 1304.0 1063.0 Tue Mar 20 07:38:49 PST 2001 202.112.1.202 BEIJING-SGW-LAN.CERNET.NET 93% 1239.0 1309.0 1271.0 100% 0.0 0.0 0.0 Tue Mar 20 07:42:11 PST 2001 202.112.53.6 202.112.53.6 34% 311.0 1265.0 841.0 27% 806.0 1337.0 1033.0 Tue Mar 20 07:45:41 PST 2001 159.226.254.145 159.226.254.145 26% 463.0 938.0 822.0 32% 448.0 1044.0 745.0 Tue Mar 20 07:49:03 PST 2001 159.226.254.142 159.226.254.142 24% 806.0 1013.0 888.0 19% 779.0 1064.0 898.0 Tue Mar 20 07:52:24 PST 2001 159.226.254.70 159.226.254.70 44% 742.0 971.0 905.0 31% 646.0 1165.0 891.0 Tue Mar 20 07:55:46 PST 2001 159.226.2.10 159.226.2.10 25% 622.0 957.0 851.0 30% 461.0 1152.0 758.0 Tue Mar 20 07:59:07 PST 2001