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Internet Architecture Considerations for Assymetric and Unidirectional Broadcast Links

Document Type Expired Internet-Draft (udlr WG)
Expired & archived
Author Jon Crowcroft
Last updated 1998-11-25
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


Satellite hops, the region between a basestation and a set of mobile nodes, and a number of other similar scenarios represent a challenge to providing IP connectivity at various levels due to the 1-many broadcast nature of the link. The UDLR group has addressed these problems in some limited situations. The general case, where multiple, possibly partially intersecting set of such hops are part of a general set of Internet Paths (or need to be considered in the route computation that will buld such paths) is complex. This note is an attempt to outline a framework for the general case. We include certain recent approaches to managing connectivity that also include quality of service, multiple alternate paths, and traffic engineering considerations. In this version of this note, we are discussing techniques for connectivity, so mechanisms and techniques described are applicable to routers. We would need a seperate (and hopefully much simpler) set of mechanisms to incorporate hosts that exist on a unidirectional link or path that includes such links.


Jon Crowcroft

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)