You'll cover both general and OpenFlow-specific debugging tools.

In the process, you'll be introduced to tools that will later prove useful for turning the provided hub into a learning switch. Iperf gives quite accurate results with comparison to license tool like IxChariot.In this section, you'll bring up the development environment. As it’s an open source so can used without any license. To measure any performance in Wired or Wireless network Iperf is the basic requirement. Here –t 20sec and –i 5sec so we should see Iperf output at 5sec interval. Here is the screenshot for Default and Customized windows size: Here is the expected UDP client screenshot.Throughput may be higher than the connected bandwidth.After UDP client throughput is completed, we should not any server report for average.When we run UDP client without server, we can identify this with some observations When we run TCP client without TCP server this error occurs. Here is the screenshot of UDP server output in PC2 Here is the screenshot of UDP client in PC1. Here is the screenshot of UDP server in PC2. Next if we want to try combination B, then we just need to run TCP server in PC2 and TCP client in PC1. Here is the screenshot for TCP server side Here is the screenshot of TCP client in PC2. So first we have to start server and if it’s successful then it will be in listing mode. Here is the screenshot of TCP server in PC1. Now we have PC1 and PC2 so below combinations can be run between these two PCs. Below are minimum arguments which can be used to run iperf. There are many arguments for Iperf command, we will discuss on only important and useful arguments. We can use man iperf command in Linux to get all arguments. There are other arguments but not used in general. Used when IPv6 address is used instead of IPv4 Important Iperf Arguments: Argumentīandwidth So always check in server side for UDP data. So even if IPERF server is not running client will able send data unlike TCP. Note: UDP does not establish any UDP connection before transferring data and UDP does not need any ACK from other side. But remember Iperf 2.0 does not work with Iperf 3.0. It’s better to keep same version of Iperf or close versions. Here is one screenshot for ping from PC2 to PC1 Here is one screenshot for ping from PC1 to PC2 Do ping from PC2 to PC1 to check the reachbility of PC1 from PC3. We can use ping 192.168.1.102 from PC1 console or command line to see if PC1 is able to reach PC2. PC1 should ping to PC2 and vice versa.

There are some conditions before Iperf to work. Iperf version 2.0.5 ( ) pthreads Iperf Conditions:

Mininet wireshark command line mode