Router FastEthernet0/1 is up, line protocol is down (disabled)

[MrOrister]

Hello!

Some outputs would help to investigate the problem more deeply, but as a good 1st step I recommend checking the speed/duplex settings on both end to match and pay high attention for the duplex settings to be Full on both ends.
Hope I could help! 

Regards

[liviu.gheorghe]

Hello @tecnatan2 ,

also make sure the port to which the router is connected in not shutdown.

[balaji.bandi]

is this virtual or Physical, what devices are they ?

this could be :

1. Cable issue

2. speed Mismatch

3. duplex issue.

[Blue_Bird]

Hello tecnatan2 ,

Cisco ethernet interfaces are normally down / down if they don't have a link. If you're seeing up / down, the most likely causes are:

Cable fault

Speed/duplex mismatch

Cable is good..., if that is connected between two switches or between switch and router. but one side switch/router had it's interface in "administratively down" state, will cause the issue. "no shutdown" command at interface level solve's the problem..!!

Best regards
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