Reading the output of iperf ?

czezz · 11-27-2014, 05:13 AM

How do I read following output of iperf ?
Client: 192.170.1.81
Server: 83.10.224.162

Looking at Client:
Does it mean that it is 1.01 Mbits/sec bandwidth of Upload or Download ?
Looking at Server:
Does it mean that it is 983 Kbits/sec bandwidth of Upload or Download ?

Code:

Client# iperf -c 83.10.224.162 -t 60
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
------------------------------------------------------------
Client connecting to 83.10.224.162, TCP port 5001
TCP window size: 21.0 KByte (default)
------------------------------------------------------------
[  3] local 192.170.1.81 port 45584 connected with 83.10.224.162 port 5001
Waiting for server threads to complete. Interrupt again to force quit.
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-63.1 sec  7.62 MBytes  1.01 Mbits/sec

Code:

Server# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[  4] local 83.10.224.162 port 5001 connected with 192.170.1.81 port 44285
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-65.1 sec  7.62 MBytes    983 Kbits/sec

unSpawn · 12-07-2014, 06:12 AM

Quote:

Originally Posted by czezz

Looking at Client:
Does it mean that it is 1.01 Mbits/sec bandwidth of Upload or Download ?

Unless you specify bidirectional testing that'll be upload.

//NTLB

czezz · 12-09-2014, 05:42 AM

Thats the case - I cannot fully agree with that.
If client uploaded 1.01 Mbits/sec then it means that server has received it - so download with 983 Kbits/sec

How can I be sure it is not opposite:
Server sent (uploaded) 983 Kbits/sec to client which downloaded 1.01 Mbits/sec

unSpawn · 12-09-2014, 08:07 PM

I don't see any reason to argue the first case?..

czezz · 12-10-2014, 07:25 AM

Hi,
its not an argue. Its just not crystal clear what is measured.