Originally introduced as a hidden command in IOS 11, Route Table Profiling is now an officially supported command and can be very helpful to Cisco network Admins. With Route Table Profiling, you can monitor for fluxuations in the routing table, route flapping, and network outages, among other things. This feature is enabled globally with ip route profile and you can view information about it with show ip route profile.
Joe Harris, CCIE #6200 has a great article on it over at his site with lots of details and examples. To view the full article visit: 6200Networks.com Route Table Profiling.