I have a WAN with 350 active routes (RIP) at any given point of time. The routers (1600/1700/2500) learn only a maximum of 255 routes out of the available 350 routes. Once I do a clear ip route *, it learns all the 350 routes. However after 3 minutes of route invalid timer, approx 100 routes are lost and subsequently flushed out. The routes being lost are totally random.
