Abstract:
Embodiments of the present invention disclose a method, an apparatus, and a system for a layer 2 interworking based on an IPv6. The method includes: receiving a router solicitation packet of the first terminal device, and sending a router advertisement packet to the first terminal device. The router advertisement packet carries a prefix option including an AdvOnlink tag and a management tag, to enable generation of a direct route to the second terminal device according to the AdvOnlink tag, and the management tag is used to direct the first terminal device to adopt a DHCP to obtain an IP address. The method, apparatus, and system provided according to embodiments of the present invention may implement the direct route between terminal devices to which IPv6 addresses with a same prefix are assigned by a same DHCP server.