Fastethernet is up , Line protocol Down Cisco 1841

[aryarahul]

Hi,

I have a cisco 1841 whose LAN interface is showing status as "Fastethernet 0/1 is up , line protocol is down" the duplex and speed settings in the Router are in Auto mode and the Router was working fine till now , when i changed the duplex settings to duplex full , speed 100 the ping replies comes back with 5-6 replies then the link dies again..

Kindly Suggest what could be done in this case

[John Blakley]

That's a physical problem. I would try replacing the cable, checking the switchport it's connected to, moving to a different switchport, and then last but not least, try moving your config to fa0/0 on the router and see if the problem still occurs. (The latter will require down time.)

HTH,

John