IP:4PKYygVA On Wed, May 29, 2019, 3:48 PM Bob McMahon via Iperf-users < iperf-users@lists.sourceforge.net> wrote:
> For UDP (-u) the -l on the client defines the UDP payload size. A 1470 > byte UDP payload will generate the max ethernet frame for ipv4 and 1450 > bytes for ipv6. > > TCP is a byte protocol where there is no direct control of a layer 2 > packet's frame size. The -l sets the write() size, -w the window size, -M > the maximum segment size and the MTU size is set on an interface per the > operating system. > > Bob > > On Wed, May 29, 2019 at 8:55 AM Sudeep Gupta <sudeepgupta...@gmail.com> > wrote: > >> Hi, >> >> I want to run a test using a fixed framesize. I couldn't find an option >> to set the framesize in iperf documentation. Can someone point me to the >> parameter which can specify framesize? >> >> Regards, >> Sudeep >> _______________________________________________ >> Iperf-users mailing list >> Iperf-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/iperf-users >> > _______________________________________________ > Iperf-users mailing list > Iperf-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/iperf-users > On Wed, May 29, 2019, 3:48 PM Bob McMahon via Iperf-users < iperf-users@lists.sourceforge.net> wrote: > For UDP (-u) the -l on the client defines the UDP payload size. A 1470 > byte UDP payload will generate the max ethernet frame for ipv4 and 1450 > bytes for ipv6. > > TCP is a byte protocol where there is no direct control of a layer 2 > packet's frame size. The -l sets the write() size, -w the window size, -M > the maximum segment size and the MTU size is set on an interface per the > operating system. > > Bob > > On Wed, May 29, 2019 at 8:55 AM Sudeep Gupta <sudeepgupta...@gmail.com> > wrote: > >> Hi, >> >> I want to run a test using a fixed framesize. I couldn't find an option >> to set the framesize in iperf documentation. Can someone point me to the >> parameter which can specify framesize? >> >> Regards, >> Sudeep >> _______________________________________________ >> Iperf-users mailing list >> Iperf-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/iperf-users >> > _______________________________________________ > Iperf-users mailing list > Iperf-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/iperf-users >
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