Device for selecting routing information for a router in a communications network

The router's routing information management device for communication network, comprising: The first routing database, including with the routing information in the routing protocol message, comprisingThe second transmission database, wherein a maximum number, entryAnd management device, comprising to the first is in the time for transmitting the entry number and is smaller than or more than that a second transmitting database the maximum entry number's designation threshold compares, the routing information according with the aim of designating according to the comparison result feeding into the second transmitting a.