
Best Practices for Virtualizing and Managing Exchange 2013
Best Practices and Recommendations
We recommend that you use host-level NIC Teaming to increase resiliency and bandwidth. NIC
Teaming supports up to 32 NICs from mixed vendors. It is important to have NICs within a team
with the same speed.
Hyper-V Extensible Switch
Shown in Figure 19, the Hyper-V Extensible Switch is a layer-2 virtual interface that provides
programmatically managed and extensible capabilities to connect virtual machines to the physical
network.
With its new features and enhanced capabilities, the Hyper-V Extensible Switch supports tenant
isolation, traffic shaping, protection against virtual machines infected with malicious code, and simplified
troubleshooting. With built-in support for Network Device Interface Specification (NDIS) filter drivers and
Windows Filtering Platform (WFP) callout drivers, the Hyper-V Extensible Switch also enables independent
software vendors (ISVs) to create extensible plug-ins (known as Virtual Switch Extensions) that can provide
enhanced networking and security capabilities.
Figure 19: Hyper-V Extensible Switch
The two public Windows platforms for extending Windows networking functionality are used as follows:
NDIS filter drivers: Used to monitor or modify network packets in Windows.
WFP callout drivers: Used to allow ISVs to create drivers to filter and modify TCP/IP packets,
monitor or authorize connections, filter IPsec-protected traffic, and filter RPCs. Filtering and
modifying TCP/IP packets provides unprecedented access to the TCP/IP packet processing path.
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