I am having a strange problem with two routers showing the same behaviour. The problem is that that the routers are not reachable form the corporate LAN after some time. Pinging the routers IP is not working anymore. When the network cable is unplugged and plugged in again the routers are responding again. The same applies when I connect my Laptop to the router. The interface is responsive right after I connect the cable. Also other devices on the network can ping the router. But after a few hours or sometimes 1,5 day the router is unreachable form the corporate network.
The problem first started a few weeks ago. The configuration did not change. The router 878 was not responsing and after changing all the cables and conncting it to another swith the problem remained. So I suspected a hardware failure and bought a replacement 888. After configuring the 888 it showed the same behaviour as the 878 router. The DSL connection is working all the time. I can even set up a vpn connection to the router and start a telnet session. than I can ping the internap IP of the router but pinging another device is not working.
What I noticed after the command sh int vlan1 is that the last input counter keeps increasing.
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