Larrabeiti López, DavidCalderón Pastor, María CarmenAzcorra Saloña, ArturoUrueña Pascual, Manuel2009-04-282009-04-282002Active Middleware Services, 2002. Fourth Annual International Workshop on AMS 2002. Edinburgh, Scotland. July 2002. P. 3-10.0-7695-1721-8https://hdl.handle.net/10016/4084The usage of general-purpose processors externally attached to routers to play virtually the role of active coprocessors seems a safe and cost-effective approach to add active network capabilities to existing routers. This paper reviews this router-assistant way of making active nodes, addresses the benefits and limitations of this technique, and describes a new platform based on it using an enhanced commercial router. The features new to this type of architecture are transparency, IPv4 and IPv6 support, and full control over layer 3 and above. A practical experience with two applications for path characterization and a transport gateway managing multi-QoS is described.application/pdfengconference outputElectrónica10.1109/AMS.2002.1029684open access