Resolving Inter-Domain Policy Disputes

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چکیده

The Border Gateway Protocol (BGP) allows each autonomous system (AS) to select routes to destinations based on semantically-rich and locally-determined policies. This autonomously exercised policy freedom can cause instability, where unresolvable policy-based disputes in the network result in interdomain route oscillations. Several recent works have established that such instabilities can only be eliminated by enforcing a globally accepted preference ordering on routes (such as shortest path). To resolve this conflict between policy autonomy and system stability, we propose a distributed mechanism that enforces a preference ordering only when disputes resulting in oscillations exist. This preserves policy freedom when possible, and imposes stability when required.

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تاریخ انتشار 2007