I have a Cisco 1812 with a c181x-advipservicesk9-mz.123-8.YI1.bin IOS, that is negotiating an internet pppoe connection through a bridge. It negotiates the public ip x.x.x.x, and in the router I have a route pointing the ip y.y.y.y to null0. When I try to ping the x.x.x.x from another internet connection y.y.y.y, it is reachable. It seems that any icmp traffic with destination my router interface (x.x.x.x) is sent in the same interface where it came in, and does not get routed. Any ideas.
I have this problem too.