How to recover from the relay control information multicast relay system, relay device of multicast and multicast relay device

摘要

PPROBLEM TO BE SOLVED: To provide a technology for promptly recovering relay control information of a multicast relay apparatus. PSOLUTION: A multicast relay system is equipped with: a first multicast relay apparatus; and a second multicast relay apparatus connected to the first multicast relay apparatus. The first multicast relay apparatus is equipped with: a relay processing section for performing relay processing of a multicast packet based on relay control information; a transmission section for transmitting duplicate creation information to the second multicast relay apparatus; a distribution request section for requesting the distribution of a duplicate of the relay control information to the second multicast relay apparatus; and a setting section for setting relay control information based on the duplicate of the relay control information. The second multicast relay apparatus is equipped with: a duplicate creation section for creating a duplicate of relay control information based on the duplicate creation information; and a distribution section for distributing the duplicate of the relay control information to the first multicast relay apparatus. PCOPYRIGHT: (C)2011,JPO&INPIT