My unit is doing the smart devices, embedded devices using UDP transmission and cloud server through Ethernet communication, our topology is connected a TP is about 10 - linkR473 (or other vendors router), the router through the network operators access to the Internet, each device UDP local port is 6000, the problem of equipments in the scene appear offline, I found at the scene, using a laptop running network debugging assistant, using local port 6000, unable to communicate with the server, use other port is normal,

Excuse me, is this a router problem, or network problems, or the IP address of the impassability, local port will distinguish,

Is currently some site operation is normal, and some problems such network sites, embedded devices is unified, network routers and operators are different,