The ISO IDRP document's name is: "Information Processing Systms - Telecommunicatons and Information Exchange between Systems - Protocol for Exchange of Inter-domain Routeing INformation among Intermediate Systems to Support Forwarding of ISO 8473 PDUs." Other ISO related documents that you may find of interest are:Another document of historical interest is a document on interaction between IS-IS and IDRP to allow autoconfiguration of nodes to start at a node, and spread to IS-IS, and into IDRP. It was a contribution to ANSI X3S3.3 in 1993. (auto-idrp )
IETF IDRP Standards Documents
pre /preImportant IDRP Concepts
IDRP path attributes allow certain pieces of information to be tagged to a set of reachable NLRI prefix (or in IETF language CIDR address). The path attributes include the routing domain pathway, next hop router information, and quality of services. The path attributes are:
Reception of Routes from peers. Preference is assigned to routes and external routes are transmitted to internal peers.
Routes from all the peers are assigned a preference. Tied preferences are settled.