http://www.rfc-editor.org/rfc/rfc5558.txt
RFC 5558: Virtual Enterprise Traversal (VET), F. Templin2010-02-01T23:00:00-00:00Enterprise networks connect routers over various link types, and may also connect to provider networks and/or the global Internet. Enterprise network nodes require a means to automatically provision IP addresses/prefixes and support internetworking operation in a wide variety of use cases including Small Office, Home Office (SOHO) networks, Mobile Ad hoc Networks (MANETs), multi-organizational corporate networks and the interdomain core of the global Internet itself. This document specifies a Virtual Enterprise Traversal (VET) abstraction for autoconfiguration and operation of nodes in enterprise networks. This document is not an Internet Standards Track specification; it is published for informational purposes.