Abstract: A method of exchanging information by the Internet protocol in the form of datagrams each including a TOS field normally dedicated to receiving routing parameters. The method includes configuring network equipment to define an identification zone in the TOS field and associating equipment of a first type with identifiers that can be encoded in said identification zone. When a piece of equipment of the first type sends a datagram to a piece of equipment of the second type, the identifier of the piece of equipment of the first type in question is encoded in the identification zone. When the datagram is received by the equipment of the second type, it is first checked that the identifier appears in a table of authorized identifiers prior to accepting the datagram.

Abstract: A method of exchanging information between a first network implementing a routing protocol using static routing tables and a second network implementing a routing protocol using dynamic routing tables and including stages of exchanging identification messages and of exchanging routing table update messages, the method comprising the steps of: a first routing element associated with the first network issuing to a second routing element associated with the second network identification messages containing identifiers of network elements to which the first routing element knows it is connected either directly or indirectly, and in the second routing element updating the routing table from the identification messages coming from the first routing element.

Abstract: A method of exchanging information between a first network implementing a routing protocol using static routing tables and a second network implementing a routing protocol using dynamic routing tables and including stages of exchanging identification messages and of exchanging routing table update messages, the method comprising the steps of: a first routing element associated with the first network issuing to a second routing element associated with the second network identification messages containing identifiers of network elements to which the first routing element knows it is connected either directly or indirectly, and in the second routing element updating the routing table from the identification messages coming from the first routing element.

Abstract: A method of exchanging information by the Internet protocol in the form of datagrams each including a TOS field normally dedicated to receiving routing parameters, the method comprising the steps of: configuring network equipment to define an identification zone in the TOS field; associating equipment of a first type with identifiers that can be encoded in said identification zone; and on a piece of equipment of the first type sending a datagram to a piece of equipment of the second type, encoding the identifier of the piece of equipment of the first type in question in the identification zone, and on the datagram being received by the equipment of the second type, checking that the identifier appears in a table of authorized identifiers prior to accepting the datagram.