Patent ID: 7620039

Claim:
A routing information management device for a router of a communication network, said device comprising a first routing information base adapted to be fed with routing information contained in routing protocol messages, a second forwarding information base having a maximum number of entries, and management means adapted to feed said second forwarding information base with routing information coming from said first routing information base, in which device said management means compares, at selected times, the number of entries in said first routing information base relating to forwarding, to a selected threshold less than or equal to said maximum number of entries in said second forwarding information base so as to feed said second forwarding information base with routing information selected as a function of the result of said comparison, wherein, if said number of entries in said first routing information base relating to forwarding is greater than or equal to said selected threshold, said management means feeds said second forwarding information base with “primary” routing information representing only primary routes enabling said router to ensure complete connectivity vis à vis addresses that it knows and if said number of entries in said first routing information base relating to sending is less than said selected threshold, said management means feeds said second forwarding information base with said primary routing information and “secondary” routing information.