| 摘要 |
A method and system establish a bi-directional tunnel (125) through direct communication between a tunnel end point (TEP) and a user node (111) without user assistance. The method includes: operating the user node (111) in order to establish the bi-directional tunnel (125), wherein operating the user node (111) includes: requesting network information necessary for establishing the bi-directional tunnel (125) to the DHCP server (112); when the user node (111) receives the network information from the DHCP server (112), establishing a unidirectional tunnel from the user node (111) to the TEP (121) based on the received network information; requesting one of the TEPs to establish the unidirectional tunnel; and when the user node (111) receives a router advertisement (RA) message of a second network (130) with which the user node (111) wishes to communicate from the TEP (121) required to establish the unidirectional tunnel, establishing an address of the user node (111) in the second network (130).
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