I am facing a strange problem We have Cisco 3845 router and ISP has provided a MPLS link. When we terminate it on laptop our next hop starts pinging. but when we connect it on router it donot ping to next hop. We changed the slot of WIC card and also replaced the card. After replacing the card and changing the slot we were properly recieving the ping replies but it stops after some time. Interface remains up and up . No log is there is logging.
Please suggest if there any way to get the exact problem or how to resolve the problem