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This article will explain in detail the performance or functional testing of tcpreplay commands using linux. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Tcpreplay is a playback tool for pcap packages, which can replay packages captured with ethreal or wireshark tools as they are or after arbitrary modification. It allows you to make arbitrary changes to the message (mainly to the layer 2, layer 3, layer 4 headers), specify the speed of replay the message, etc., so that tcpreplay can be used to reproduce the situation of the packet to locate the bug, and replay it at a very fast speed to achieve stress testing.

Syntax format: tcpreplay [parameters] [file]

Common parameters:

A

-vA "nnt" means that the message is output in tcpdump style, and the timestamp, hostname, port service name are not printed. Be careful not to use the-c parameter to specify the number of printed data packets, so that fewer messages will be sent-c dual network card playback message required parameters, followed by cache file name, which is constructed for tcpprep according to the corresponding pcap file-I dual network card playback message required parameters, specify the main interface-K to rewrite the source MAC address of the slave network card-O has not been tested

Reference example

Tcpprep the ftp.pcap file to make the cache file:

[root@linuxcool] # tcpprep-an client-I ftp.pcap-o ftp.cache-v

Replay the message caught on the tftp server * a, use ethereal to grab the packet on the tftp server, and save it as a tftp.pcap file. B. Tcpprep the pcap file and make the cache file:

[root@linuxcool] # tcpreplay-c ftp.cache-I eth0-j eth2 ftp.pcap-R-v on the use of linux tcpreplay command performance or functional testing is shared here, I hope the above content can be helpful to you, you can learn more knowledge. If you think the article is good, you can share it for more people to see.

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