Iperf results explanation (-t)
Hi,
I am using Iperf to test a satellite link (e.g. high latency). I am running
the test for 10 sec (-t 10) with the -r option to do a reverse test.
The following are the results.
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 128 KByte (WARNING: requested 128 KByte)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to SERVER, TCP port 5001
TCP window size: 128 KByte (WARNING: requested 128 KByte)
------------------------------------------------------------
[ 4] local CLIENT port 1795 connected with SERVER port 5001
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-38.5 sec 10.4 MBytes 2.26 Mbits/sec
[ 4] local CLIENT port 5001 connected with SERVER port 32771
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.8 sec 1.24 MBytes 962 Kbits/sec
My question is : Why is the interval upstream 38.5 sec (for a 10 sec test)
and the downstream interval 10.8 sec? Does this mean that for 28.5/0.8 sec
Iperf is waiting for ACKs?
Does this have to do with Iperf waiting for ACKs, if so what is the exact
function of -t ? D
Regards,
Laurens Binken
Consultant
KPMG
Information Risk Management
Burg. Rijnderslaan 20
1185 MC Amstelveen
tel. +31 (0) 20 656 8396
fax +31 (0) 20 656 8388
e-mail binken.laurens --at-- kpmg.nl
X.400 c=NL;a=CONCERT;p=KPMG;s=binken;g=rens
http://www.kpmg.nl/irm
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