Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!cica!tut.cis.ohio-state.edu!ucbvax!DORSAI.ICS.HAWAII.EDU!torben From: torben@DORSAI.ICS.HAWAII.EDU ("Torben N. Nielsen") Newsgroups: comp.protocols.tcp-ip Subject: Re: trace route to OZ Message-ID: <89Jul18.225302hst.89@dorsai.ics.hawaii.edu> Date: 19 Jul 89 08:52:52 GMT Sender: daemon@ucbvax.BERKELEY.EDU Organization: The Internet Lines: 91 >From: Mills@udel.edu >To: Jon Crowcroft >cc: G.Michaelson@cc.uq.oz.au, tcp-ip@sri-nic.arpa, ja@cs.ucl.ac.uk >Subject: Re: trace route to OZ >Message-ID: <8907182209.aa04438@huey.udel.edu> >Status: R > >Jon, > >(Sputter) About that hop from ARPANET to MILNET at NASA/Ames. Either the >Munchkins are upon us or the Wicked Witch ain't dead. I conclude the route >to Oz is via US DoD, but who would find that surprising? > >Dave It may be going that way, but it shouldn't be. If my understanding of the situation is correct, the UK is linked via JVNC. Now, if I run a simple thing like a ``traceroute" to ``jvnc.csc.org" (and Oz is one hop South of here), I get the following: traceroute to jvnca.csc.org (128.121.50.1), 30 hops max, 40 byte packets 1 menehune.Hawaii.Net (128.171.1.6) 0 ms 0 ms 10 ms 2 132.160.249.2 (132.160.249.2) 60 ms 70 ms 70 ms 3 ARC1.BARRNET.NET (192.52.195.7) 70 ms 70 ms 70 ms 4 ARC.SU.BARRNET.NET (131.119.3.6) 70 ms 70 ms 70 ms 5 129.140.79.13 (129.140.79.13) 140 ms 150 ms 140 ms 6 129.140.81.15 (129.140.81.15) 220 ms 200 ms 200 ms 7 129.140.72.17 (129.140.72.17) 240 ms 230 ms 230 ms 8 * * * 9 zaphod-gateway.jvnc.net (128.121.54.72) 260 ms 270 ms 300 ms 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 jvnca.csc.org (128.121.50.1) 390 ms ! 530 ms ! 490 ms ! and when I run ``traceroute" to ``nsfnet-relay.ac.uk", I get the following: traceroute to nsfnet-relay.ac.uk (128.86.8.6), 30 hops max, 40 byte packets 1 menehune.Hawaii.Net (128.171.1.6) 0 ms 0 ms 10 ms 2 132.160.249.2 (132.160.249.2) 70 ms 70 ms 70 ms 3 ARC1.BARRNET.NET (192.52.195.7) 60 ms 70 ms 70 ms 4 ARC.SU.BARRNET.NET (131.119.3.6) 80 ms 70 ms 70 ms 5 129.140.79.13 (129.140.79.13) 140 ms 140 ms 140 ms 6 129.140.81.15 (129.140.81.15) 190 ms 200 ms 200 ms 7 129.140.72.17 (129.140.72.17) 230 ms 240 ms 240 ms 8 * * * 9 ford-gateway.jvnc.net (128.121.54.73) 250 ms 260 ms 240 ms 10 fenchurch-gateway.jvnc.net (128.121.54.78) 270 ms 260 ms 270 ms 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 NSFNET-RELAY.AC.UK (128.86.8.6) 3840 ms ! 930 ms ! * Up through the seventh hop, it's clear to me what is happening. But after that, I get kind of confused. I can't really tell how many hops there are in between the JVNC gateways and ``nsfnet-relay.ac.uk". What I can tell is that I have a stable RTT of about 250ms between me and the JVNC gateways. But when I try to reach ``nsfnet-relay.ac.uk" with a ``ping", this is what I get: ----nsfnet-relay.ac.uk PING Statistics---- 104 packets transmitted, 88 packets received, 15% packet loss round-trip (ms) min/avg/max = 930/3123/5270 And that is not so good. Even the minimum seems to indicate an RTT of almost 700ms across that little pond and even if this is a 56Kbps satellite link, that's pretty stiff. I presume some other gateway is hiding in between plus likely a *very* high load on that line. Things are bad since I also have New Zealand swimming around somewhere South of here and they're having trouble getting mail through to the UK. And they tend to send a lot to the UK I gather :-( Torben P.S. For those who care, Oz is a 56Kbps satellite hop South of here; it converts to a 64Kbps terrestrial line (via ANZCAN) around the middle of August. Or at least that's what the carriers tell us. But maybe they're just trying to keep us happy while thinking up an excuse to delay a bit. Doubt it though....