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Last update: 2004-03-31

End: 2003-01

Atom-Based Routing

Improving global internet routing by implementing atom-based routers.

Routing protocols such as BGP operate on individual prefixes. Each update, table entry, and computation is based on a single prefix as the basic element. Although several prefixes may be stored or transmitted at a time by BGP, the prefix remains the basic element of the protocol. For example, an update message may carry a route containing several prefixes, but the receiving BGP router will still need to consider each prefix in the message separately in its computations.

A routing protocol based on atoms will treat a number of prefixes as equivalent and amortise overhead of the protocol over the equivalent prefixes. Such a routing protocol is the goal of this project.

The effects of atom-based routing are similar to CIDR in that both are able to summarise prefixes (as aggregates and atoms respectively) and treat the summary as a unit. An important difference is that CIDR aggregation can be performed independently by each router; however by definition the computation of an atom requires cooperation between many routers.

200207-plan/index.html More details about the benefits of Atom-based Routing can be found in the project plan.

Project Atom-Based Routing

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