> ---- Original Message ----
 > From: "Thomas, Calvin"
 > To help find the bottleneck:
 >
 > Quickly find network problems by telneting to one of the servers, opening
 > ftp, ftp "putting" a copy of any convienent 100MB file, then "getting" the
 > same (copy) of the file back again.  Takes seconds, tells the kbps/mbps
 > transfer speed between both machines in both directions.  THIS IS IMPORTAN
 > T
 > since I have had machines that can put at 10MBPS, but get at 15KBPS.

Fwiw, the equiv with iperf is --tradeoff and it's a bit
more convenient and spiffy.  And when you go over a
misconfigured 100FDX segement with iperf, you get REALLY
wonky output.

steve
- - -
systems & network guy
high energy physics
university of wisconsin

$ sudo iperf --client iperf.wiscnet.net --tradeoff --interval 1
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to iperf.wiscnet.net, TCP port 5001
TCP window size: 16.0 KByte (default)
------------------------------------------------------------
[  6] local 128.104.28.226 port 49257 connected with 205.213.110.244 port 5001
[ ID] Interval       Transfer     Bandwidth
[  6]  0.0- 1.0 sec  11.3 MBytes  94.6 Mbits/sec
[  6]  1.0- 2.0 sec  11.2 MBytes  94.0 Mbits/sec
[  6]  2.0- 3.0 sec  11.2 MBytes  94.2 Mbits/sec
[  6]  3.0- 4.0 sec  11.2 MBytes  94.2 Mbits/sec
[  6]  4.0- 5.0 sec  11.2 MBytes  94.0 Mbits/sec
[  6]  5.0- 6.0 sec  11.2 MBytes  94.2 Mbits/sec
[  6]  6.0- 7.0 sec  11.2 MBytes  94.2 Mbits/sec
[  6]  7.0- 8.0 sec  11.2 MBytes  94.0 Mbits/sec
[  6]  8.0- 9.0 sec  11.2 MBytes  93.9 Mbits/sec
[  6]  9.0-10.0 sec  11.2 MBytes  94.3 Mbits/sec
[  6]  0.0-10.0 sec   112 MBytes  94.1 Mbits/sec
[  6] local 128.104.28.226 port 5001 connected with 205.213.110.244 port 45024
[ ID] Interval       Transfer     Bandwidth
[  6]  0.0- 1.0 sec  11.2 MBytes  93.9 Mbits/sec
[  6]  1.0- 2.0 sec  11.2 MBytes  94.1 Mbits/sec
[  6]  2.0- 3.0 sec  11.2 MBytes  94.1 Mbits/sec
[  6]  3.0- 4.0 sec  11.1 MBytes  93.0 Mbits/sec
[  6]  4.0- 5.0 sec  11.2 MBytes  94.1 Mbits/sec
[  6]  5.0- 6.0 sec  11.2 MBytes  94.1 Mbits/sec
[  6]  6.0- 7.0 sec  11.2 MBytes  94.1 Mbits/sec
[  6]  7.0- 8.0 sec  11.2 MBytes  94.1 Mbits/sec
[  6]  8.0- 9.0 sec  11.2 MBytes  94.1 Mbits/sec
[  6]  9.0-10.0 sec  11.2 MBytes  94.1 Mbits/sec
[  6]  0.0-10.0 sec   112 MBytes  94.0 Mbits/sec

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