Microsoft_Press_ebook_Introducing_Windows_Server_2012_R2_PDF.pdf

Upgrading your private cloud with windows server 2012

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“Upgrading Your Private Cloud with Windows Server 2012 R2” at .com/Events/TechEd/NorthAmerica/2013/MDC-B331. “Application Availability Strategies for the Private Cloud” at Events/TechEd/NorthAmerica/2013/MDC-B311. “Storage and Availability Improvements in Windows Server 2012 R2” at .msdn.com/Events/TechEd/NorthAmerica/2013/MDC-B333. “Understanding the Hyper-V over SMB Scenario, Configurations, and End-to-End Performance” at MDC-B335.
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85 C H A P T E R 5 Networking C urrently, IT is all about the cloud, and the foundation of cloud computing is infrastructure. If you’re an enterprise that’s going to build and manage a private cloud, then you’ll be dealing with three main kinds of infrastructure: compute, storage, and network. And if you’re a hoster creating a cloud for selling services to customers, then you’ll be working with the same three building blocks but on a much larger scale and with additional features that are essential for hosting environments such as multitenant isolation, IP address management, and Network Virtualization. In Chapter 2, “Hyper-V,” we looked at Hyper-V improvements in Windows Server 2012 R2. Hyper-V hosts provide the compute infrastructure needed for running virtualized workloads in a cloud infrastructure. In Chapter 3, “Storage,” we examined storage improvements in the new platform. Storage Spaces and the Scale-out File Server (SoFS) are two storage technologies that can enable new scenarios and help lower costs when deploying the storage infrastructure for a cloud solution. In Chapter 4, “Failover Clustering,” we looked at how the Failover Clustering feature has been enhanced in the platform. Failover clustering enables your compute and storage resources to be highly available, which is essential for today’s always-on businesses. In this chapter, we’ll now examine the networking improvements in Windows Server 2012 R2. Networking is the underlying glue that holds your infrastructure together, makes possible the delivery of services, makes remote management a reality, and more. But first let’s begin by reviewing the networking enhancements introduced earlier in Windows Server 2012. Previous enhancements to networking Some of the many networking improvements introduced previously in Windows Server 2012 included the following: Dynamic VMQ Virtual Machine Queue (VMQ) allows a host’s network adapter to pass DMA packets directly into the memory stacks of individual virtual machines. The net effect of doing this is to allow the host’s single network adapter to appear to the virtual machines as multiple network interface cards (NICs) which then allows each virtual machine to have its own dedicated NIC. Windows Server 2012 improved this by introducing Dynamic VMQ, which dynamically distrib-
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86 CHAPTER 5 Networking uted incoming network traffic processing to host processors, based on processor use and network load. The earlier implementation, which was also called Static VMQ, was
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