Method for providing VPN services to Mobile Node in IPv6 network and gateway using the same

摘要

A method for providing a VPN(Virtual Private Network) service to a mobile node in an IPv6 network and a gateway for the same are provided to offer IP mobility in a VPN service and support the mobility of a mobile node inside and outside a VPN domain by executing a function corresponding to a mobile IPv6 HA(Home Agent). An MVPN gateway executes an IKE(Internet Key Exchange) negotiation with a mobile node which has executed handover, acquires a SA(Security Association), and authenticates the mobile node(S301). The MVPN gateway receives a BU(Binding Update) message from the mobile node, verifies it, stores new location information of the mobile node, transmits a BA(Binding Acknowledge) message, and executes mobility processing(S303). Then, the MVPN executes IPsec(IP security) processing for a packet to be transmitted to a CN(Correspondent Node) from the mobile node and delivers it to the CN(S305). For a packet transmitted to home address of the mobile node from the CN, the MVPN reconfigures it so that it can be delivered to the CoA(Care of Address) of the mobile node(S307).