Hi all,
I am using Iperf to find the optimal sending rate of my wireless mesh
network. I am running into an issue when I run the following command:
iperf -u -fk -c 5.0.0.1 *-b 5000K* -p 4000 -t 10
I get the following report (or something very similar). I've bolded parts
in question:
------------------------------
------------------------------
Client connecting to 5.0.0.1, UDP port 4000
Sending 1470 byte datagrams
UDP buffer size: 109 KByte (default)
------------------------------------------------------------
[ 3] local 5.0.0.24 port 58708 connected with 5.0.0.1 port 4000
[ 3] 0.0-10.2 sec *3623 KBytes* 2916 Kbits/sec
[ 3] Sent 2524 datagrams
[ 3] Server Report:
[ 3] 0.0-10.4 sec *2703 KBytes* 2128 Kbits/sec 26.951 ms 640/ 2523
(25%)
[ 3] 0.0-10.4 sec 1 datagrams received out-of-order
Why is it that when I start the client and specify -b 5000K that I am
sending at a rate much less (3623 KBytes)? Shouldn't Iperf send out UDP
packets as fast as it can? I can understand that the acutal bandwidth is
much less (2703 KBytes) considering I lost 25% of the packets. Please
explain to me why Iperf is not trying to send out at 5000 KBytes. How is
the number 3263 KBytes calculated?
Thanks,
Randy Buck
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