I have an issue with a router's fast ethernet interface. The Interface says it is up, but line protocol is down. I have tried several times to get the line protocol up but i some how just cant get it to start.
Please see attached config file for the config of the router.
Any assistance will be welcomed please.
You say: "I believe that if the Interface is up, then the cable must be plugged in". That is an incorrect assumption. In my experience when a cable is not plugged in the Ethernet/Fast Ethernet will show to be line up line protocol down, which is the exact symptom that you report. I suspect that if someone physically checks the connection that they will find that the interface is not connected to a switch or anything.
That what i was suspecting, since the description says, "LAN".
Did the router send any log messages ?
Try, like someone sayed several configurations port speed/duplex. Starts with a auto/auto.
If that dont result, check cabling to switch.
If that dont result, check if the users on the switch could ping each other. If they could not do it, u may have a malfunction switch.
"Fast Ethernet n is up, line protocol is down":
- "The specified Fast Ethernet interface has been correctly configured and enabled, but the Ethernet cable might be disconnected from the LAN."
Hope i have helped
Check with cable is connected or not, if cable is connected properly and check with the ISP people wheather they have connected properly or not (max problem with the ISP side. call ISP people check the status from them.