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Iperf

Iperf. Adviser ： Quincy Wu Speaker ： Ying Shun Lin Nov.30 ， 2005. Outline. Introduction to iperf How to use iperf Command line option / experiment. Introduction to Iperf. ■ iperf 為網路封包（ IPv4/IPv6 ）產生軟體，進 而產生 TCP & UDP 的傳輸數據 。 ■ 量測網路的 - TCP/UDP throughput (Max.)

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Iperf

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  1. Iperf Adviser：Quincy Wu Speaker：Ying Shun Lin Nov.30， 2005

  2. Outline • Introduction to iperf • How to use iperf • Command line option / experiment

  3. Introduction to Iperf ■iperf 為網路封包（IPv4/IPv6）產生軟體，進 而產生TCP & UDP的傳輸數據。 ■量測網路的 - TCP/UDP throughput (Max.) - UDP delay jitter - UDP pack loss

  4. How to use iperf ■ Where to download? -http://dast.nlanr.net/Projects/Iperf/ ■ format - server side : $ iperf -s -% $ iperf -s -V - client side : $ iperf -c <server address> -% $ iperf -c<server IPv6 address>

  5. Command line option class • Client / Server options • Server specific options • Client specific options

  6. Command line option Server specific option • -s：run in server mode • -D：run the server as a daemon

  7. Command line option (Client/Server) • -w：For TCP ， window size (Default ：8K for Windows 32.5K for FreeBSD) For UDP， buffer size (Default ：8K for Windows 9K for FreeBSD) • -f：specifying the format to print bandwidth numbers in. 'b' = bits/sec 'B' = Bytes/sec 'k' = Kbits/sec 'K' = KBytes/sec 'm' = Mbits/sec 'M' = MBytes/sec 'g' = Gbits/sec 'G' = GBytes/sec (Default) 'a' = adaptive bits/sec 'A' = adaptive Bytes/sec

  8. Command line option (cont.)

  9. Command line option (cont) • -i：Sets the interval time. • -l：The length of buffers to read or write. - ( Default 8KB for TCP, 1470 bytes for UDP) - Buffer Delay is unfavorable to Real-Time Application. • -u：Use UDP rather than TCP. • -C：Compatibility mode allows for use with older version of iperf.

  10. Command line option (cont)

  11. Command line option Client specific options • -b：for UDP, bandwidth to send atinbits/sec. (default 1 Mbit/sec, implies -u) • -n：number of bytes to transmit(instead of -t) • -t：time in seconds to transmit for (default 10 secs)

  12. Command line option (cont) • -P：number of parallel client threads to run .

  13. Command line option (cont) • -B：Bindto host,. This is only useful on multihomed hosts, which have multiple network interfaces. - For Iperf in UDP server mode, join to a multicast group. Use addresses in the range 224.0.0.0 to 239.255.255.255 for multicast

  14. THANK YOU FOR YOUR ATTENTION

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