Re: Iperf 1.7.0 UDP problem
>Date: Wed, 11 Jun 2003 05:48:00 -0700
>From: joseph.liu --at-- jpl.nasa.gov
>To: Gregory Goddard <ggoddard --at-- ufl.edu>
>Cc: Iperf Users <iperf-users --at-- dast.nlanr.net>
>Subject: Re: Iperf 1.7.0 UDP problem
>
>Greg,
>
>Thanks for your info. Now I know how to issue the UDP test commands. It is
strange though that in the previous version, it does not matter how one
specifies the syntax or order of options.
>
>To test UDP with a bandwidth of ### kbps, the following command is tested
to be OK. The -c option has to be first. Like this:
>
>iperf -c <ip_address of server> -u -b ###k
>
>If the command option is in a different order, either a warning statement
is returned or the UDP test will be done in 1 Mbps bandwidth.
>
>Is this a new feature? Just curious.
>
>Regards,
>
>Joseph Liu
>JPL
>
>On Tue, Jun 10, 2003 at 11:51:29PM -0400, Gregory Goddard wrote:
>>
>> If you do something like:
>>
>> iperf -p 5005 -b 512k -u -c host
>>
>> you'll get a warning message that says:
>>
>> WARNING: option -b implies udp testing
>> WARNING: option -b is not valid for server mode
>>
>> Try reversing the syntax as follows, and things should work:
>>
>> iperf -c host -p 5005 -b 512k -u
>>
>> (I could be completely off, but I've seen this behavior before.)
>>
>> Cheers, -g
>>
>> On Tue, 10 Jun 2003, Mitch Kutzko wrote:
>>
>> > >From: "Joseph Liu" <joseph.liu --at-- jpl.nasa.gov>
>> > >To: <iperf-users --at-- dast.nlanr.net>
>> > >Subject: Iperf 1.7.0 UDP problem
>> > >Date: Tue, 10 Jun 2003 16:00:51 -0700
>> > >
>> > >Hello,
>> > >
>> > >Something is different between version 1.7.0 and previous version, e.g.
>> > >1.6.5 or even 1.2.0, on IPv4 UDP testing.
>> > >
>> > >In the previous version, the -b option specifies the udp bandwidth to be
>> > >sent by a client. The new 1.7.0 test udp only at default 1.0 Mbps.
The -b
>> > >option is no longer valid. No matter what -b ###k I specify, the test is
>> > >always at 1 Mbps.
>> > >
>> > >Does anyone know what the problem is? The system environment is:
>> > >
>> > >RedHat Linux, version 7.3 and version 8.0
>> > >Intel i386 kernel
>> > >No compilation error
>> > >TCP stream test works file with the 1.7.0 version though
>> > >
>> > >Thanks,
>> > >
>> > >Joseph Liu
>> > >JPL
>> > >
>> > >
>> > --
>> > Mitch Kutzko | mitch --at-- dast.nlanr.net | mitch --at-- ncsa.uiuc.edu | 217-333-1199
>> > http://hobbes.ncsa.uiuc.edu/
>> >
>
>
--
Mitch Kutzko | mitch --at-- dast.nlanr.net | mitch --at-- ncsa.uiuc.edu | 217-333-1199
http://hobbes.ncsa.uiuc.edu/