This Technical Report describes a protocol for the exchange of Network Layer routeing information between intermediate systems in different routeing domains.
It also describes the relationships which need to be established by administrative procedures to provide the framework within which the protocol can operate.
The content of this Technical Report can be applied to any intermediate system which explicitly participates in inter-domain routeing.
However, this Technical Report also includes the concept of grouping together sets of intermediate system (concerned with closely-related domains) into clusters, such that the procedures are applied to communication between these clusters, while permitting a freer locally- determined exchange of information within clusters.