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friend just replaced the ZTE F7015T optical cat today, it is normal to plug in any network port (2.5G port and Gigabit port) network, but only two of the network ports are plugged in, the network will drop frequently, the web page cannot be opened or opened slowly, and the WeChat message is slow to send and receive. It's no problem to look at the settings in the background of the light cat. Please help me see what is wrong and how to set it up? Or is there something wrong with the light cat? This ZTE F7015T will start to drop packets as long as 2 network ports are plugged in at the same time, 99% of which is not a "setting" problem, but the following 3 types of hardware/......