Simple example of ZTP

[guking3]

Dear Experts：
I had open the ENABLE_ZTP compile option, but the ztp server didn't work well，only the IP address of the port is assigned
How can the option 67 and 239 be used, and where is the configdb-json file should be putting? Can you give me the simple realizing method both conifg file and usage method，I would appreciate for this，Thank you！