Sorry if this is very vague.
We have a PPP connection between are campuses. The network is running but is recieving collision errors on both uplinks to the routers. The duplex and speed to set to auto, and gets half/10MB's. (There is a 10MB line between the buildings.)
When I hardcode the speed/duplex to half/10MB. The interfaces shut down and there is no activity at all.
Both routers are managed thru are ISP.
What is most likely the issue? Thanks!