Domain Routing Protocol IdRP for routing services for the OSI network environment, which is similar to the BGP protocol of the TCP / IP network. The ISO network contains terminal systems, intermediate systems, regions, and domains. The terminal system refers to a user equipment, an intermediate system refers to a router. The local group of the router is called "region", and multiple regions form a "domain". IdRP is designed to provide domain internal route selection service. IdRP, CLNP, IS-IS and ES-IS are combined to provide a complete routing process for the entire network.
The router in the IDRP is called the boundary intermediate system BIS, which is only included in one domain. IdRP is responsible for managing the switching process of routing information internally or outside two neighborhoods. Information exchange between external neighborhoods is independently executed, and information exchange between internal phase neighborhoods depends on other support provided by the domain within the domain (unless the internal phase neighborhood shares a universal subnet).
To facilitate the centralized / extract of the route selection information, the connected domains in the IDRP form a routing domain RDC. A particular domain may belong to multiple routing domain alliances. The domain groups in RDCs provide a simple and powerful routing information concentration / extraction mechanism. The single RDCI formed by the RD_Path transmitted RDIS sequence reduces the use of toposcopic information, and the use of transmission policy information, and simplifies the path selection policy.
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