Connectivity Providers Database

From: Olivier MJ Crepin-Leblond <o.crepin-leblond@ic.ac.uk> To: Info-Nets <info-nets@rg.net> CC: Steven Huter <sghuter@psg.com> Date: Wed, 9 Oct 1996 17:55:39 +0100 Traceroute from here in the UK fails somewhere on the way: venus:~> traceroute DNS.IZPT.ZR traceroute to DNS.IZPT.ZR (193.210.151.74), 30 hops max, 40 byte packets 1 mercury (155.198.136.1) 1.954 ms 1.822 ms 1.802 ms 2 ee-gw.ic.ac.uk (155.198.120.1) 3.1 ms 3.043 ms 3.033 ms 3 cisco-xr2.ic.ac.uk (155.198.1.8) 203.093 ms 107.056 ms 12.166 ms 4 smds-gw.thouse.ja.net (193.63.203.46) 28.789 ms 17.349 ms 9.81 ms 5 gw.linx.ja.net (193.62.157.242) 212.352 ms 15.487 ms 65.087 ms 6 UK-s0.dante.bt.net (194.72.26.197) 32.74 ms 23.639 ms 14.151 ms 7 UK-f0-0.eurocore.bt.net (194.72.24.153) 23.894 ms 16.342 ms 15.789 ms 8 CH-s2-0.eurocore.bt.net (194.72.24.242) 38.311 ms 52.151 ms 41.564 ms 9 CH-f0.global.bt.net (194.72.24.67) 34.931 ms 47.893 ms 56.89 ms 10 cern-ebs1.ebone.net (194.72.26.142) 175.048 ms 152.15 ms 154.558 ms 11 * Paris-EBS1.Ebone.NET (192.121.157.10) 454.664 ms * 12 * Stockholm-ebs.ebone.net (192.121.154.21) 393.544 ms * 13 Stockholm-DGIX.datanet.tele.fi (194.68.128.22) 356.914 ms 342.485 ms * 14 bruva1-s0-3.datanet.tele.fi (192.130.130.50) 595.437 ms * * 15 193.209.45.227 (193.209.45.227) 956.947 ms * 640.369 ms 16 194.215.66.17 (194.215.66.17) 510.294 ms 444.038 ms 518.346 ms 17 * * * 18 * * * 19 * * * etc. BUT Ping & SMTP (etc.) works (although with great delay and packet loss, which could explain the failure of the traceroutes): venus:~> ping dns.izpt.zr PING dns.izpt.zr (193.210.151.74): 56 data bytes 64 bytes from 193.210.151.74: icmp_seq=1 ttl=239 time=1348.0 ms 64 bytes from 193.210.151.74: icmp_seq=3 ttl=239 time=1399.2 ms 64 bytes from 193.210.151.74: icmp_seq=4 ttl=239 time=732.1 ms 64 bytes from 193.210.151.74: icmp_seq=7 ttl=239 time=1141.0 ms 64 bytes from 193.210.151.74: icmp_seq=10 ttl=239 time=1286.6 ms 64 bytes from 193.210.151.74: icmp_seq=11 ttl=239 time=1410.9 ms 64 bytes from 193.210.151.74: icmp_seq=12 ttl=239 time=1172.2 ms 64 bytes from 193.210.151.74: icmp_seq=17 ttl=239 time=1300.9 ms 64 bytes from 193.210.151.74: icmp_seq=19 ttl=239 time=846.7 ms 64 bytes from 193.210.151.74: icmp_seq=21 ttl=239 time=1113.2 ms 64 bytes from 193.210.151.74: icmp_seq=23 ttl=239 time=1508.4 ms 64 bytes from 193.210.151.74: icmp_seq=24 ttl=239 time=749.0 ms 64 bytes from 193.210.151.74: icmp_seq=27 ttl=239 time=660.9 ms 64 bytes from 193.210.151.74: icmp_seq=28 ttl=239 time=496.2 ms 64 bytes from 193.210.151.74: icmp_seq=30 ttl=239 time=587.1 ms 64 bytes from 193.210.151.74: icmp_seq=33 ttl=239 time=705.1 ms 64 bytes from 193.210.151.74: icmp_seq=36 ttl=239 time=769.9 ms 64 bytes from 193.210.151.74: icmp_seq=37 ttl=239 time=1528.4 ms --- dns.izpt.zr ping statistics --- 39 packets transmitted, 18 packets received, 53% packet loss round-trip min/avg/max = 496.2/1041.9/1528.4 ms SMTP follows: venus:~> telnet DNS.IZPT.ZR 25 Trying 193.210.151.74... Connected to DNS.IZPT.ZR. Escape character is '^]'. 220-dns.izpt.zr Sendmail 8.6.12/8.6.12 ready at Wed, 9 Oct 1996 18:44:46 +0200 220 ESMTP spoken here vrfy root 250 Kimberley Supervisor <root@dns.izpt.zr> expn postmaster 250 Kimberley Supervisor <root@dns.izpt.zr> quit 221 dns.izpt.zr closing connection -- Olivier M.J. Crepin-Leblond, EE Dept | Also: Global Information Highway Ltd. Imperial College of Science, Tech. & | Mobile: +44 (0)956 84 1113 Medicine, London SW7 2BT, UK | Fax: +44 (0)171 937 7666 <foobar@ic.ac.uk> In Funk We Trust <foobar@gih.com>