(new in iPerf 3.1)Ī letter specifying the format to print bandwidth numbers in. This should be the same in both client and server. The server port for the server to listen on and the client to connect IPerf 3 user documentation GENERAL OPTIONS
Compatibility mode allows for use with older version of iPerf (-C).Report as a Comma-Separated Values (-y).Exclude C(connection) D(data) M(multicast) S(settings) V(server) reports (-x).iPerf2 Features Not Supported by iPerf3 :.-logfile file : send output to a log file.-udp-counters-64bit : Support very long-running UDP tests, which could cause a counter to overflow.-sctp use SCTP rather than TCP (Linux, FreeBSD and Solaris).-cport : Specify the client-side port.-I, -pidfile file write a file with the process ID, most useful when running as a daemon.iPerf3 will only allow one iperf connection at a time. -s, -server : iPerf2 can handle multiple client requests.Primarily (perhaps exclusively) of use to developers. -C, -linux-congestion : set congestion control algorithm (Linux and FreeBSD only) (-Z in iPerf2).-L, -flowlabel : set IPv6 flow label (Linux only).-k, -blockcount # : number of blocks (packets) to transmit (instead of -t or -n).-A, -affinity n/n,m : set CPU affinity (cores are numbered from 0 - Linux and FreeBSD only).-F, -file name : xmit/recv the specified file.-T, -title str : prefix every output line with this string.-Z, -zerocopy : use a 'zero copy' sendfile() method of sending data.-V, -verbose : more detailed output than before.-b, -bandwidth n for TCP (only UDP for IPERF 2): Set target bandwidth to n bits/sec (default 1 Mbit/sec for UDP, unlimited for TCP).-O, -omit N : omit the first n seconds (to ignore TCP slowstart).-R, Reverse test mode – Server sends, client receives.iPerf API (libiperf) – Provides an easy way to use, customize and extend iPerf functionality.A iPerf3 server accepts a single client simultaneously (multiple clients simultaneously for iPerf2).Dynamic server (client/server parameter exchange) – Most server options from iPerf2 can now be dynamically set by the client.Setting TCP options: No delay, MSS, etc.iPerf2 features currently supported by iPerf3 :.Change between iPerf 2.0.6, iPerf 2.0.7 and iPerf 2.0.8Ĭhange between iPerf 2.0, iPerf 3.0 and iPerf 3.1.
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