Abstract: Routers split and share routing information among several routers within a group of routers acting as a single border router in an Internet protocol (IP) network, each router comprising a routing table. A router of the group selects routes in the routing table of the router; requests other routers of the group to replace, in their routing tables, each selected route with the router as next hop; associates parts of-non selected routes, each one with another router of the group; and removes and replaces, in the routing table, each-non selected route associated with a router of the group by the associated router as next hop.