Network-Performance-Tools

A (soon to be expanding) collection of useful network performance tools, written in Java.

Tools

Iperfer

A tool for measuring network bandwidth. Iperfer sends and receives TCP packets between a pair of hosts using sockets.

When operating in client mode, Iperfer will send TCP packets to a specific host for a specified time window and track how much data was sent during that time frame; it will calculate and display the bandwidth based on how much data was sent in the elapsed time.

When operating in server mode, Iperfer will receive TCP packets and track how much data was received during the lifetime of a connection; it will calculate and display the bandwidth based on how much data was received and how much time elapsed between the reception of the first byte of data and the last byte of data.

Usage - Iperfer

Client Mode

To operate Iperfer in client mode, invoke it as follows:

$ java Iperfer -c -h [server hostname] -p [server port] -t [time]

• -c indicates this is the iperf client that generates the data.
• server hostname is the hostname or IP address of the iperf server which will consume data.
• server port is the port on which the remote host is waiting to consume data; the port should be in the range 1024 < server port < 65536.
• time is the duration in seconds for which data should be generated.

The presence of the -c option will be taken as an indicator that Iperfer is being run in client mode.

After time seconds have passed, Iperfer will stop sending data, close the connection, and print a one line summary that includes:

• The total number of bytes sent (in kilobytes.)
• The rate at which traffic could be sent (Mbps.)

Server Mode

To operate Iperfer in server mode, invoke it as follows:

$ java Iperfer -s -p [listen port]

• -s indicates this is the iperf server which should consume data.
• listen port is the port on which the host is waiting to consume data; the port should be in the range 1024 < listen port < 65536.

The presence of the -s option will be taken as an indicator that Iperfer is being run in server mode.

After the client has closed the connection, Iperfer will print a one line summary that includes:

• The total number of bytes received (in kilobytes.)
• The rate at which traffic could be read (Mbps.)