Hash-based routing for scalable datacenters

Authors:
Mike Schlansker;Jean Tourrilhes;Yoshio Turner;Jose Renato Santos
Affiliations:
Hewlett-Packard Laboratories;Hewlett-Packard Laboratories;Hewlett-Packard Laboratories;Hewlett-Packard Laboratories
Venue:
Proceedings of the 5th ACM/IEEE Symposium on Architectures for Networking and Communications Systems
Year:
2009

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Abstract

Most datacenter networks are based on specialized edge-core topologies, which are costly to build, difficult to maintain and consume too much power. We propose enhancements to layer-two (L2) Ethernet switches to enable multipath L2 routing in scalable datacenters. Our hash-based routing approach reuses and minimally extends hardware structures in high-volume switches, while exposing a powerful network management interface for multipath load balancing, QoS differentiation, and resilience to faults.