portland-sigcomm09 - PortLand: A Scalable Fault-Tolerant...

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Unformatted text preview: PortLand: A Scalable Fault-Tolerant Layer 2 Data Center Network Fabric Radhika Niranjan Mysore, Andreas Pamboris, Nathan Farrington, Nelson Huang, Pardis Miri, Sivasankar Radhakrishnan, Vikram Subramanya, and Amin Vahdat Department of Computer Science and Engineering University of California San Diego {radhika, apambori, farrington, nhuang, smiri, sivasankar, vikram.s3, vahdat}@cs.ucsd.edu ABSTRACT This paper considers the requirements for a scalable, eas- ily manageable, fault-tolerant, and efficient data center net- work fabric. Trends in multi-core processors, end-host vir- tualization, and commodities of scale are pointing to future single-site data centers with millions of virtual end points. Existing layer 2 and layer 3 network protocols face some combination of limitations in such a setting: lack of scal- ability, difficult management, inflexible communication, or limited support for virtual machine migration. To some ex- tent, these limitations may be inherent for Ethernet/IP style protocols when trying to support arbitrary topologies. We observe that data center networks are often managed as a single logical network fabric with a known baseline topol- ogy and growth model. We leverage this observation in the design and implementation of PortLand, a scalable, fault tolerant layer 2 routing and forwarding protocol for data center environments. Through our implementation and eval- uation, we show that PortLand holds promise for supporting a plug-and-play large-scale, data center network. Categories and Subject Descriptors C.2.1 [ Network Architecture and Design ]: Network communications; C.2.2 [ Network Protocols ]: Routing protocols General Terms Algorithms, Design, Performance, Management, Reliability Keywords Data center network fabric, Layer 2 routing in data centers 1. INTRODUCTION There is an increasing trend toward migrating applica- tions, computation and storage into data centers spread across the Internet. Benefits from commodities of scale are Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise, to republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. SIGCOMM09, August 1721, 2009, Barcelona, Spain. Copyright 2009 ACM 978-1-60558-594-9/09/08 ...$10.00. leading to the emergence of mega data centers hosting ap- plications running on tens of thousands of servers [3]. For instance, a web search request may access an inverted index spread across 1,000+ servers, and data storage and analysis applications may interactively process petabytes of informa- tion stored on thousands of machines. There are significant application networking requirements across all these cases....
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portland-sigcomm09 - PortLand: A Scalable Fault-Tolerant...

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