ENCORE: An Inter-AS Diagnostic System Using Cooperative Distributed Agents

O. Akashi, T. Sugawara, K. Murakami, M. Maruyama, and N. Takahashi


For reliable operation of the Internet, it is crucial that each autonomous system (AS) understands the implications of the routing information that it advertises, and verifies that its intentions are correctly propageted by observing the information about itself from the viewpoint of other ASs. This paper proposes a network diagnostic system, ENCORE. It is based on the reflector model where intelligent agents in ASs cooperatively infere the dynamics of the Internet and analyze network faults. In ENCORE, an agent in an AS monitors routing informaiton in its environment and shares the infromation with agents in other ASs. The agents then perform collective analysis based on diagnostic knowledge to identify problems.

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