| 摘要 |
A method for implementing redundancy backup between Network Address Translation (NAT) devices includes: an Internet Protocol version 4 (IPv4) address pool and a prefix64 are pre-configured on at least two NAT devices, where the prefix is used to map an IPv4 address to an Internet Protocol version 6 (IPv6) address; the master NAT device advertises in an IPv6 network a route corresponding to the prefix, and advertises in an IPv4 network a route corresponding to the IPv4 address pool; and the slave NAT device processes a packet between a source host and a destination host when the master NAT device fails, where the source host and the destination host are located in different Internet Protocol (IP) networks. With the technical solutions of the present invention, redundancy backup is implemented between multiple NAT devices to improve reliability of networking of NAT devices.
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