一个网络速度测试工具，支持IPv4与IPv6，支持TCP、UDP、SCTP传输协议，可在Windows、Mac OS X、Linux、FreeBSD等各种平台使用，是一个简单又实用的小工具。

常用方式举例：

S端：

iperf -s -u -i 1

 

C端：

iperf.exe -c 192.168.x.x -p 5001 -u -b 30m -t 10 -w 3072

 

-w 包大小

-i 间隔

-t 次数

-b 带宽

-u udp模式

-p 指定端口

 

# Linux 版本参数说明

[loki@loki-c7t1 ~]$ iperf --help |moreUsage: iperf [-s|-c host] [options]       iperf [-h|--help] [-v|--version]Client/Server:  -b, --bandwidth #[kmgKMG | pps]  bandwidth to send at in bits/sec or packets per second  -e, --enhancedreports    use enhanced reporting giving more tcp/udp and traffic information  -f, --format    [kmgKMG]   format to report: Kbits, Mbits, KBytes, MBytes  -i, --interval  #        seconds between periodic bandwidth reports  -l, --len       #[kmKM]    length of buffer in bytes to read or write (Defaults: TCP=128K, v4 UDP=1470, v6 UDP=1450)  -m, --print_mss          print TCP maximum segment size (MTU - TCP/IP header)  -o, --output    
     
       output the report or error message to this specified file  -p, --port      #        server port to listen on/connect to  -u, --udp                use UDP rather than TCP      --udp-counters-64bit use 64 bit sequence numbers with UDP  -w, --window    #[KM]    TCP window size (socket buffer size)  -z, --realtime           request realtime scheduler  -B, --bind 
      
       [:
       
        ][%
        
         ] bind to 
         
          , ip addr (including multicast address) and optional port and device  -C, --compatibility      for use with older versions does not sent extra msgs  -M, --mss       #        set TCP maximum segment size (MTU - 40 bytes)  -N, --nodelay            set TCP no delay, disabling Nagle's Algorithm  -S, --tos       #        set the socket's IP_TOS (byte) fieldServer specific:  -s, --server             run in server mode  -t, --time      #        time in seconds to listen for new connections as well as to receive traffic (default not set)      --udp-histogram #,#  enable UDP latency histogram(s) with bin width and count, e.g. 1,1000=1(ms),1000(bins)  -B, --bind 
          
           [%
           
            ] bind to multicast address and optional device -H, --ssm-host 
            
              set the SSM source, use with -B for (S,G) -U, --single_udp run in single threaded UDP mode -D, --daemon run the server as a daemon -V, --ipv6_domain Enable IPv6 reception by setting the domain and socket to AF_INET6 (Can receive on both IPv4 and IPv6)Client specific: -c, --client 
             
               run in client mode, connecting to 
              
                -d, --dualtest Do a bidirectional test simultaneously --ipg set the the interpacket gap (milliseconds) for packets within an isochronous frame --isochronous 
               
                :
                
                 ,
                 
                   send traffic in bursts (frames - emulate video traffic) -n, --num #[kmgKMG] number of bytes to transmit (instead of -t) -r, --tradeoff Do a bidirectional test individually -t, --time # time in seconds to transmit for (default 10 secs) -B, --bind [
                  
                    | 
                   
                    ] bind ip (and optional port) from which to source traffic -F, --fileinput 
                    
                      input the data to be transmitted from a file -I, --stdin input the data to be transmitted from stdin -L, --listenport # port to receive bidirectional tests back on -P, --parallel # number of parallel client threads to run -R, --reverse reverse the test (client receives, server sends) -T, --ttl # time-to-live, for multicast (default 1) -V, --ipv6_domain Set the domain to IPv6 (send packets over IPv6) -X, --peer-detect perform server version detection and version exchange -Z, --linux-congestion 
                     
                       set TCP congestion control algorithm (Linux only)Miscellaneous: -x, --reportexclude [CDMSV] exclude C(connection) D(data) M(multicast) S(settings) V(server) reports -y, --reportstyle C report as a Comma-Separated Values -h, --help print this message and quit -v, --version print version information and quit[kmgKMG] Indicates options that support a k,m,g,K,M or G suffixLowercase format characters are 10^3 based and uppercase are 2^n based(e.g. 1k = 1000, 1K = 1024, 1m = 1,000,000 and 1M = 1,048,576)The TCP window size option can be set by the environment variableTCP_WINDOW_SIZE. Most other options can be set by an environment variableIPERF_
                      
                       , such as IPERF_BANDWIDTH.Source at 
                       Report bugs to 
                       
                      
                     
                    
                   
                  
                 
                
               
              
             
            
           
          
         
        
       
      
     

 

# Windows 版本参数说明

c:\xx\iperf2>iperf.exe -hUsage: iperf [-s|-c host] [options]       iperf [-h|--help] [-v|--version]Client/Server:  -b, --bandwidth #[KMG | pps]  bandwidth to send at in bits/sec or packets per second  -e, --enhancedreports    use enhanced reporting giving more tcp/udp and traffic information  -f, --format    [kmKM]   format to report: Kbits, Mbits, KBytes, MBytes  -i, --interval  #        seconds between periodic bandwidth reports  -l, --len       #[KM]    length of buffer to read or write (default 8 KB)  -m, --print_mss          print TCP maximum segment size (MTU - TCP/IP header)  -o, --output    
     
       output the report or error message to this specified file  -p, --port      #        server port to listen on/connect to  -u, --udp                use UDP rather than TCP  -w, --window    #[KM]    TCP window size (socket buffer size)  -z, --realtime           request realtime scheduler  -B, --bind      
      
          bind to 
       
        , an interface or multicast address  -C, --compatibility      for use with older versions does not sent extra msgs  -M, --mss       #        set TCP maximum segment size (MTU - 40 bytes)  -N, --nodelay            set TCP no delay, disabling Nagle's Algorithm  -V, --ipv6_domain        Set the domain to IPv6Server specific:  -s, --server             run in server mode  -U, --single_udp         run in single threaded UDP mode  -D, --daemon             run the server as a daemonClient specific:  -c, --client    
        
            run in client mode, connecting to 
         
            -d, --dualtest           Do a bidirectional test simultaneously  -n, --num       #[KM]    number of bytes to transmit (instead of -t)  -r, --tradeoff           Do a bidirectional test individually  -t, --time      #        time in seconds to transmit for (default 10 secs)  -B, --bind [
          
            | 
           
            ] bind src addr(s) from which to originate traffic -F, --fileinput 
            
              input the data to be transmitted from a file -I, --stdin input the data to be transmitted from stdin -L, --listenport # port to receive bidirectional tests back on -P, --parallel # number of parallel client threads to run -T, --ttl # time-to-live, for multicast (default 1) -Z, --linux-congestion 
             
               set TCP congestion control algorithm (Linux only)Miscellaneous: -x, --reportexclude [CDMSV] exclude C(connection) D(data) M(multicast) S(settings) V(server) reports -y, --reportstyle C report as a Comma-Separated Values -h, --help print this message and quit -v, --version print version information and quit[KM] Indicates options that support a K or M suffix for kilo- or mega-The TCP window size option can be set by the environment variableTCP_WINDOW_SIZE. Most other options can be set by an environment variableIPERF_
              
               , such as IPERF_BANDWIDTH.Source at 
               Report bugs to