Networking

Simple Failure Resilient Load Balancing

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Executive Summary

To enable reliable data delivery and balance load in the presence of failures, the authors propose a new mechanism that combines path protection and traffic engineering. The key benefit of the solution is its simplicity, allowing for fast recovery while imposing minimal requirements on the routers. To provide resilience against every failure scenario from a known set, the authors advocate using a fixed set of parallel end-to-end paths for each traffic demand. Upon detecting a path failure, the ingress router uses a local rule to rebalance the outgoing traffic on the remaining available paths.

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