This read-only INTEGER (0..500000) reports the maximum number of destination/mask network route entries the internal route table is actually able to hold, which may differ from the administratively configured xbgpConfiguredMaxRoutes due to how routes with multiple masks are stored. An admin compares it against xbgpConfiguredMaxRoutes to see whether a change made via that object has taken effect (which requires a reset) and what the real operating ceiling is. If xbgpOperationalMaxRoutes still shows the old value after raising xbgpConfiguredMaxRoutes, the admin knows the box still needs to be reset.