Method for constructing IPv6 forwarding/interface information in distributed IPv4 based router

摘要

A method for constructing IPv6(Internet Protocol version 6) forwarding and external interface information in a distributed IPv4-based router is provided to allow an IPv4 router to add an IPv6 function by upgrading software to thus provide an IPv6 forwarding service. When a line card is initially driven in a distributed IPv4-based router, initial IPv6 forwarding information and initial interface address information are set to synchronize an operation state of the initially driven line card to that of a different line card already existing in the router. When new IPv6 forwarding information is generated in the operation state, the new forwarding information is constructed in a kernel or an internal memory of the line card. When the interface address and the information with an external network of the router are changed by an operator of the router, the changed items are constructed in the kernel or the internal memory.