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"Routing and Addressing in Networks with Global Enterprise Recursion (RANGER)" (RFC 5720) provides an architectural framework for scalable routing and addressing. It provides an incrementally deployable approach for scalability, provider independence, mobility, multihoming, traffic engineering, and security. This document describes a series of use cases in order to showcase the architectural capabilities. It further shows how the RANGER architecture restores the network-within-network principles originally intended for the sustained growth of the Internet. This document is not an Internet Standards Track specification; it is published for informational purposes.

RANGER is an architectural framework for scalable routing and addressing in networks with global enterprise recursion. The term "enterprise network" within this context extends to a wide variety of use cases and deployment scenarios, where an "enterprise" can be as small as a Small Office, Home Office (SOHO) network, as dynamic as a Mobile Ad Hoc Network, as complex as a multi-organizational corporation, or as large as the global Internet itself. Such networks will require an architected solution for the coordination of routing and addressing plans with accommodations for scalability, provider-independence, mobility, multihoming, and security. These considerations are particularly true for existing deployments, but the same principles apply even for clean-slate approaches. The RANGER architecture addresses these requirements and provides a comprehensive framework for IPv6/IPv4 coexistence. This document is not an Internet Standards Track specification; it is published for informational purposes.