Nhrp packet authentication method and nhrp server

Details Nhrp packet authentication method and nhrp server Nhrp packet authentication method and nhrp server

H - Electricity

04

L

H04L 29/06 (2006.01) H04L 12/56 (2006.01) H04L 29/12 (2006.01)

Patent

CA 2213045

An authentication method in an NHRP (Next Hop Resolution Protocol) for performing an address resolution for converting a network layer address in an NBMA (Non-broadcast, Multi-access) network to a datalink layer address. The method comprises steps of: providing an NHRP server for performing an address resolution which has a plurality of interfaces belonging to respective sub-networks, maintaining authentication keys and authentication types respectively allocated to the interfaces in the NHRP server; authenticating an NHRP packet received from one of the interfaces by using the authentication key allocated to the interface which receives the NHRP packet; and discarding the NHRP packet in case of authentication being unauthorized. The method is capable of setting for each domain a mode for redirecting an NHRP (Next Hop Resolution Protocol) packet when authentication types between LIS (Logical IP Subnet, IP: Internet Protocol) are different and a mode for when an NHRP packet is redirected between domains.

Méthode d'authentification dans un protocole NHRP (Next Hop Resolution Protocol) permettant d'effectuer une résolution d'adresse afin de convertir une adresse de couche réseau dans un réseau NBMA (Non-broadcast, Multi-access : multi-utilisateurs, sans diffusion) en une adresse de couche liaison de données. La méthode comprend les étapes suivantes : fournir pour effectuer la résolution d'adresse, un serveur NHRP doté d'un certain nombre d'interfaces associées aux sous-réseaux respectifs, en maintenant des clés d'authentification et des types d'authentification affectés à chacune des interfaces dudit serveur; authentifier un paquet NHRP reçu d'une des interfaces en utilisant la clé d'authentification affectée à l'interface réceptrice; et rejeter le paquet NHRP si l'authentification est non autorisée. La méthode permet de définir pour chaque domaine un mode de réacheminement d'un paquet NHRP lorsque les types d'authentification diffèrent entre les LIS (Logical IP Subnet, IP : Internet protocol) et un mode applicable lorsqu'un paquet NHRP est réacheminé d'un domaine à l'autre.

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