Reports the total number of valid routes currently known to this router's routing table. Admins use it as the baseline denominator when calculating what fraction of routes have IP Fast-Reroute protection, by comparing it against ipFrrProtectedRoutes and ipFrrUnprotectedRoutes. A router reporting ipFrrTotalRoutes of 50,000 with only 10,000 protected routes tells an admin that the vast majority of routes still lack a pre-computed backup path.