Usually in the construction network process, this situation may exist. Different areas may use different equipment. For example, the ring network composed of Siemens industrial-grade managed switches used in area A N years ago is privately owned by Siemens The ring network protocol assumes A-Ring; the B area uses a ring network composed of Mosaic industrial-grade managed switches, and the Mosa private ring network protocol assumes B-Ring; the C area uses the Dongtu industrial-grade managed type The ring network composed of switches uses the Dongtu private ring network protocol assuming C-Ring; the three ring network protocols are independent of each other and are not related to each other. Assuming that the three ring networks need to be managed in a unified manner, SNMP is required at this time , By embedding SNMP in data communication equipment, such as routers, switches or hubs, you can manage these equipment from a central station and view information graphically. If the devices with different areas in the three regions need to be grouped into a large ring network for unified management, then only RSTP needs to be set at this time, provided that the ring network switches in each area must support RSTP or STP.