From: pte900@jatz.aarnet.edu.au (Peter Elford)
Newsgroups: aus.aarnet
Subject: Re: route: Australia to Germany
Date: 13 Oct 1992 00:17:13 GMT
Organization: AARNet
Distribution: world
Reply-To: P.Elford@aarnet.edu.au
NNTP-Posting-Host: 139.130.204.4

In article <1bd1flINNaan@manuel.anu.edu.au>, markus@arp.anu.edu.au (Dr Markus Buchhorn) writes:
|> 
|> I recently went jogging round the net for some sun patch files. I found
|> an excellent site in Germany. Unfortunately it had an abysmal transfer
|> rate (0.3kb/s!). Now, other sites in Europe aren't as bad, so I did
|> a 'traceroute' and found to my surprise that a lot of the problem
|> is in the U.S. - it spends a lot of its time crossing the U.S., but most
|> of that time is spent in one building (I suppose it is one building) - note
|> hops 8 thru 15. Now my question: Can This Be Fixed ? It could double the xfer
|> rate (although the last hop looks quite sick as well..)

Hops 8-15 are negotiating the T3 (45 Mb per second) NSFnet backbone.
Hops 7-8 and 14-15 are not only in the same building but probably in
the same equipment rack, but hops 8-14 will be all over the US.

Note that the delay between entering the T3 NSFnet and exiting it is
only some 80-100 msecs, which is a *VERY* small contribution to the
total round trip time of around 8 seconds. The vast bulk of the delay
is within Europe, and mostly on the link to the University of
Hamburg itself (it would appear).

The hop count has very less effect on total round trip time than
link speed and traffic load.

Peter Elford
AARNet


|> Markus
|> 
|> -----------------------------------------------------------------------------
|> markus@romeo% traceroute ftp.informatik.uni-hamburg.de
|> traceroute to rzsun2.informatik.uni-hamburg.de (134.100.4.42), 30 hops max, 40 byte packets
|>  1  cschub (150.203.5.1)  0 ms  0 ms  0 ms
|>  2  actgw (150.203.1.5)  0 ms  0 ms  0 ms
|>  3  national.gw.au (139.130.188.1)  10 ms  10 ms  10 ms
|>  4  usa.gw.au (139.130.4.5)  10 ms  10 ms  10 ms
|>  5  132.160.240.1 (132.160.240.1)  610 ms  590 ms  580 ms
|>  6  ARC1.NSN.NASA.GOV (192.100.12.1)  580 ms  610 ms  600 ms
|>  7  192.52.195.253 (192.52.195.253)  580 ms  610 ms  660 ms
|>  8  t3-2.cnss9.t3.nsf.net (140.222.9.3)  620 ms  590 ms  580 ms
|>  9  t3-3.cnss8.t3.nsf.net (140.222.8.4)  580 ms  600 ms  640 ms
|> 10  t3-0.cnss24.t3.nsf.net (140.222.24.1)  670 ms  650 ms  630 ms
|> 11  t3-0.cnss40.t3.nsf.net (140.222.40.1)  660 ms  660 ms  630 ms
|> 12  t3-1.cnss32.t3.nsf.net (140.222.32.2)  670 ms  730 ms  650 ms
|> 13  t3-1.cnss56.t3.nsf.net (140.222.56.2)  780 ms  650 ms  750 ms
|> 14  t3-0.cnss58.t3.nsf.net (140.222.58.1)  660 ms  700 ms  720 ms
|> 15  t3-0.enss136.t3.nsf.net (140.222.136.1)  670 ms  700 ms  650 ms
|> 16  College-Park.MD.ALTER.NET (192.80.214.249)  660 ms  650 ms  660 ms
|> 17   (137.39.11.1)  780 ms  700 ms  670 ms
|> 18  Amsterdam.NL.EU.NET (134.222.5.1)  1080 ms  770 ms  880 ms
|> 19  Dortmund.DE.EU.NET (134.222.1.2)  890 ms  1070 ms  900 ms
|> 20  wingate.Dortmund.DE.EU.net (139.4.10.3)  1080 ms  860 ms  960 ms
|> 21  * * *
|> 22  * rzsun2.informatik.uni-hamburg.de (134.100.4.42)  8380 ms *
|> --------------------------------------------------------------------------------
|> 
|> 
|> 

-- 
Peter Elford,                             e-mail: P.Elford@aarnet.edu.au
Network Co-ordinator                      phone: +61 6 249 3542
Australian Academic Research Network      fax:   +61 6 249 1369
c/o, Computer Services Centre             pager: +61 6 245 3035
Australian National University            post: GPO Box 1142     
Canberra, AUSTRALIA                             Canberra ACT 2601
Newsgroups: aus.aarnet