When you disable RIP from receiving host routes on a router, the router rejects to receive host routes. This prevents the router from receiving a large number of unnecessary routes and therefore avoiding wasting network resources.
In certain situations, a FW may receive a large number of host routes from the same network segment. These routes are not required in route addressing, but consume many network resources. You can configure the FW to refuse to accept host routes by disabling RIP from accepting host routes.
By default, host routes are added to the routing table.
system-view
rip [ process-id ]
undo host-route
undo host-route command will not be effective in RIP version 2. By default, RIP version 2 always supports host-route.