Why Some Fastethernet Ports On The Switches Are Up And Others Are Down?
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Some FastEthernet ports on a switch may be up and others down due to a variety of reasons, including a failure to establish a connection with the device on the other end of the port, or the port being disabled. Additionally, if the port is configured to be in a specific VLAN, it won’t be able to communicate with devices in other VLANs, resulting in the port being down.