As the title asked. nowadays I want to make a simple plugin and add it to the controller . So I first test the ping example with the help of wiki . After finishing the Ping-plugin .I tested the function of the ping , the result is that it reported "拒绝连接" which means "connection rejected "in English.
Is there anyone succeed or know how to solve the problem? PS:the version of the ODL is He, and git branch is "stable Helium" .