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32nd IEEE Conference on Local Computer Networks (LCN 2007) (2007)
Dublin, Ireland
Oct. 15, 2007 to Oct. 18, 2007
ISSN: 0742-1303
ISBN: 0-7695-3000-1
pp: 165-174
Tim Stevens , Ghent University, Belgium
Joachim Vermeir , Ghent University, Belgium
Marc De Leenheer , Ghent University, Belgium
Chris Develder , Ghent University, Belgium
Filip De Turck , Ghent University, Belgium
Bart Dhoedt , Ghent University, Belgium
Piet Demeester , Ghent University, Belgium
Notwithstanding IP anycast?s introduction in Internet standards dates back to 1993 and its more recent adoption in IPv6 standards, its use in production environments is limited to date. This is mainly because native IP anycast lacks routing scalability and does not support session-based communications, thereby limiting its applicability to single request-response services such as DNS. For this reason, we propose a transparent anycast overlay architecture that retains the strengths of native anycast and neutralizes above-mentioned limitations. The resulting proxy infrastructure unleashes the power of anycast by opening up new opportunities for transparent distributed service provisioning. <p>Taking into account user demands, available resources, network overhead and anycast infrastructure costs, we provide nearoptimal heuristics for the placement of proxy nodes and dimensioning the infrastructure in large networks. We show that even modest overlay infrastructures, consisting of a small number of proxy routers, provide an effective stateful anycast solution where the detour via the proxy routers is negligible in terms of extra network load. Furthermore, simulation results illustrate that server state aggregation in the proxy nodes lessens control plane overhead, which contributes significantly to service robustness.</p>

M. D. Leenheer et al., "Distributed Service Provisioning Using Stateful Anycast Communications," 32nd IEEE Conference on Local Computer Networks (LCN 2007)(LCN), Dublin, Ireland, 2007, pp. 165-174.
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