| 摘要 |
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 (100,200,300) for performing an address resolution which has a plurality of interfaces belonging to respective sub-networks (10,20,30,40), maintaining authentication keys and authentication types respectively allocated to the interfaces in the NHRP server (100,200,300); 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 (10,20,30,40) (Logical IP Subnet, IP: Internet Protocol) are different and a mode for when an NHRP packet is redirected between domains. <IMAGE>
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