Microsoft_Press_ebook_Introducing_Windows_Server_2012_R2_PDF.pdf

Is that the total throughput of the team is 1 1 2

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is that the total throughput of the team is 1 + 1 = 2 gigabits, so teaming network adapters together basically gives your server a bigger “pipe” for sending and receiving traffic over the network the server is connected to.
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Windows NIC Teaming enhancements CHAPTER 5 91 The second benefit of NIC teaming is that it helps ensure continuous availability of the server’s connection to the network by providing fault tolerance. For example, let’s say that one of the NICs in the above team fails. If this happens, the throughput drops from 2 gigabits to 1 gigabit, and although such a 50 percent drop in network traffic handling capability could affect the performance of applications running on the server, the good thing is that the server still has some connectivity with the network. Without NIC teaming, failure of a single NIC would have caused the throughput to drop from 1 gigabit to zero, which is probably much worse from a business point of view. Before Windows Server 2012, if you wanted to make use of NIC teaming, then you had to use third-party NIC teaming software from your network adapter vendor. With the release of Windows Server 2012, however, NIC teaming became a built-in feature called Windows NIC Teaming that makes it possible to team together even commodity network adapters to aggregate throughput and enable fault tolerance. NIC Teaming in Windows Server 2012 Let’s begin with a quick overview of what Windows NIC Teaming is, what kinds of scenarios it can address, and what types of configuration modes it supports. The following short description is excerpted from the free e-book Introducing Windows Server 2012 RTM Edition (Microsoft Press, 2012) which has been downloaded over 650,000 times since it was released just over a year ago. Windows NIC Teaming is the name for the new network adapter teaming functionality included in Windows Server 2012. Network adapter teaming is also known as LBFO and enables multiple network adapters on a server to be grouped together into a team. This has two purposes: To help ensure availability by providing traffic failover in the event of a network component failure To enable aggregation of network bandwidth across multiple network adapters Previously, implementing network adapter teaming required using third-party solutions from independent hardware vendors (IHVs). Beginning with Windows Server 2012, however, network adapter teaming is now an in-box solution that works across different NIC hardware types and manufacturers. Windows NIC Teaming supports up to 32 network adapters in a team in three teaming modes: Static Teaming Also called Generic Teaming and based on IEEE 802.3ad draft v1, this mode is typically supported by server-class Ethernet switches and requires manual configuration of the switch and the server to identify which links form the team.
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