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2003 International Conference on Dependable Systems and Networks (DSN'03)   p. 403
N-Way Fail-Over Infrastructure for Reliable Servers and Routers
Yair Amir, Johns Hopkins University
Ryan Caudy, Johns Hopkins University
Ashima Munjal, Johns Hopkins University
Theo Schlossnagle, Johns Hopkins University
Ciprian Tutu, Johns Hopkins University

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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/DSN.2003.1209951
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Abstract
Maintaining the availability of critical servers and routers is an important concern for many organizations. At the lowest level, IP addresses represent the global namespace by which services are accessible on the Internet. We introduce Wackamole, a completely distributed software solution based on a provably correct algorithm that negotiates the assignment of IP addresses among the currently available servers upon detection of faults. This reallocation ensures that at any given time any public IP address of the server cluster is covered exactly once, as long as at least one physical server survives the network fault. The same technique is extended to support highly available routers. The paper presents the design considerations, algorithm specification and correctness proof, discusses the practical usage for server clusters and for routers, and evaluates the performance of the system.
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Citation:  Yair Amir, Ryan Caudy, Ashima Munjal, Theo Schlossnagle, Ciprian Tutu, "N-Way Fail-Over Infrastructure for Reliable Servers and Routers," dsn, p. 403,  2003 International Conference on Dependable Systems and Networks (DSN'03),  2003