Active networks for efficient distributed network management

The emerging next generation of routers exhibit both high performance and r ich functionality, such as support for virtual private networks and QoS. To achieve this, per-flow queuing and fast IP filtering are incorporated into the router hardware. The management of a network comprising such devices a nd efficient use of the new functionality introduce new challenges. A truly distributed network management system is an attractive candidate to addres s these challenges. In this article we describe how active network techniqu es can be used to allow fast and easy deployment of distributed network man agement applications in IP networks. We describe a prototype system where l egacy routers are enhanced with an adjunct active engine, which enables the safe execution and rapid deployment of new distributed management applicat ions in the network layer. This system can gradually be integrated in today 's IP network, and allows smooth migration from IP to programmable networks . This is done with an emphasis on efficient use of network resources, whic h is somewhat obscure by many of today's high-level solutions.