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Unformatted text preview: NetLord: A Scalable Multi-Tenant Network Architecture for Virtualized Datacenters Jayaram Mudigonda Praveen Yalagandula Jeff Mogul HP Labs, Palo Alto, CA Bryan Stiekes Yanick Pouffary HP ABSTRACT Providers of Infrastructure-as-a-Service need datacenter net- works that support multi-tenancy, scale, and ease of operation, at low cost. Most existing network architectures cannot meet all of these needs simultaneously. In this paper we present NetLord, a novel multi-tenant network architecture. NetLord provides tenants with simple and flexible network abstractions, by fully and efficiently virtualizing the ad- dress space at both L2 and L3. NetLord can exploit inexpensive commodity equipment to scale the network to several thousands of tenants and millions of virtual machines. NetLord requires only a small amount of offline, one-time configuration. We im- plemented NetLord on a testbed, and demonstrated its scalability, while achieving order-of-magnitude goodput improvements over previous approaches. Categories and Subject Descriptors C.2.1 [ Computer-Communication Networks ]: Network Archi- tecture and Design General Terms Design, Experimentation, Management Keywords Datacenter Network, Network Virtualization, Multi-Tenant, Multi- Pathing, Scalable Ethernet 1. INTRODUCTION Cloud datacenters such as Amazon EC2  and Microsoft Azure  are becoming increasingly popular, as they offer com- puting resources at a very low cost, on an attractive pay-as-you-go model. Many small and medium businesses are turning to these cloud computing services, not only for occasional large computa- tional tasks, but also for their IT jobs. This helps them eliminate the expensive, and often very complex, task of building and main- taining their own infrastructure. 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. SIGCOMM11, August 1519, 2011, Toronto, Ontario, Canada. Copyright 2011 ACM 978-1-4503-0797-0/11/08 ...$10.00. Cloud datacenter operators, on the other hand, can provide cost- effective Infrastructure as a Service (IaaS), because they can time- multiplex the physical infrastructure among a large number of ten- ants . The advent of mature CPU virtualization techniques (e.g., VMWare  and Xen ) makes it possible to convert the ded- icated, and often extremely underutilized, physical servers in an enterprise into Virtual Machines (VMs) that run in an IaaS data- center....
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This note was uploaded on 12/01/2011 for the course EE 5373 taught by Professor Chao during the Spring '11 term at NYU Poly.
- Spring '11