[ECE 453] Bandwidth Testing

From: "Matthew Warren" <warren3@xxxxxxxxxxx>
To: 453_all@xxxxxxxxxxxxx
Date: Tue, 2 Dec 2008 14:51:17 -0500
I played with iperf some today, running a server on each of the nodes
and the client on the TMC.  These are the maximum bandwidth
transmissions I was able to reliably achieve.  In many cases, I was
able to get a faster connection, but it lost a lot of packets and was
not consistently reproducible.  The server report is the line we
should be looking at, and is formatted as such:

[id] *time interval* sec *data transferred* MBytes *bandwidth*
Mbits/sec *jitter* ms *packets dropped*/*total packets* (*percentage
dropped*)

Here were my results:

embedded1:
[1884] local 5.63.122.244 port 2426 connected with 5.61.253.79 port 5001

[ ID] Interval       Transfer     Bandwidth

[1884]  0.0-10.0 sec  3.85 MBytes  3.23 Mbits/sec

[1884] Server Report:

[1884]  0.0-10.0 sec  3.85 MBytes  3.23 Mbits/sec  3.155 ms    3/ 2747 (0.11%)

[1884] Sent 2747 datagrams

embedded2:
[1884] local 5.63.122.244 port 2111 connected with 5.67.79.116 port 5001

[ ID] Interval       Transfer     Bandwidth

[1884]  0.0-10.0 sec  1.30 MBytes  1.09 Mbits/sec

[1884] Server Report:

[1884]  0.0-10.2 sec  1.28 MBytes  1.06 Mbits/sec  10.904 ms   13/  929 (1.4%)

[1884] Sent 929 datagrams

embedded3:
[1884] local 5.63.122.244 port 3468 connected with 5.66.101.13 port 5001

[ ID] Interval       Transfer     Bandwidth

[1884]  0.0-10.0 sec   978 KBytes   800 Kbits/sec

[1884] Server Report:

[1884]  0.0-10.0 sec   926 KBytes   755 Kbits/sec  7.877 ms   36/  681 (5.3%)

[1884] Sent 681 datagrams

embedded4:
[1884] local 5.63.122.244 port 1201 connected with 5.113.133.197 port 5001

[ ID] Interval       Transfer     Bandwidth

[1884]  0.0-10.0 sec  6.32 MBytes  5.29 Mbits/sec

[1884] Server Report:

[1884]  0.0-10.0 sec  6.15 MBytes  5.16 Mbits/sec  0.259 ms  123/ 4508 (2.7%)

[1884] Sent 4508 datagrams


These numbers are by no means definitive, but it gives us a good idea
of where we stand bandwidthwise with all 4 nodes functioning and the
gateway node elevated 3.5 feet higher than it was previously.  While
remote desktopping to each node today, I noticed that it was much,
much faster than it was before Lee and I went out this morning to help
Utilities fix the broken node and elevate the gateway, so there's
that.

-Matthew
[ECE 453] Bandwidth Testing

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