{"id":800932,"date":"2021-11-30T16:58:21","date_gmt":"2021-12-01T00:58:21","guid":{"rendered":"https:\/\/www.microsoft.com\/en-us\/research\/?post_type=msr-research-item&p=800932"},"modified":"2022-02-12T11:51:07","modified_gmt":"2022-02-12T19:51:07","slug":"decentralized-cloud-wide-area-network-traffic-engineering-with-blastshield","status":"publish","type":"msr-research-item","link":"https:\/\/www.microsoft.com\/en-us\/research\/publication\/decentralized-cloud-wide-area-network-traffic-engineering-with-blastshield\/","title":{"rendered":"Decentralized cloud wide-area network traffic engineering with BlastShield"},"content":{"rendered":"

Cloud networks are increasingly managed by centralized software defined
\ncontrollers. Centralized traffic engineering controllers achieve higher network
\nthroughput than decentralized implementations, but are a single point of failure
\nin the network.
\nLarge scale networks require controllers with isolated fault domains to contain
\nthe blast radius<\/em> of faults. In this work, we present BlastShield,
\nMicrosoft’s SDN-based decentralized WAN traffic engineering system.
\nBlastShield slices<\/em>\u00a0the WAN into smaller fault domains, each managed by
\nits own slice controller. Slice controllers independently engineer traffic in
\ntheir slices to maximize global network throughput without relying on
\nhierarchical or central coordination.
\nDespite the lack of central coordination, BlastShield achieves similar network
\nthroughput as state-of-the-art centralized deployments. Moreover, BlastShield
\nreduces throughput loss from the failure of a single controller by over 65%.
\nBlastShield is deployed in Microsoft’s WAN today and carries a
\nmajority of the backbone traffic.<\/p>\n","protected":false},"excerpt":{"rendered":"

Cloud networks are increasingly managed by centralized software defined controllers. Centralized traffic engineering controllers achieve higher network throughput than decentralized implementations, but are a single point of failure in the network. Large scale networks require controllers with isolated fault domains to contain the blast radius of faults. In this work, we present BlastShield, Microsoft’s SDN-based 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