Private virtual local area network or PVLAN
PVLANs allow Hyper-V administrators to isolate virtual machines
from each other (for example, virtual machines cannot contact other virtual
machines over the network), while still maintaining external network
connectivity for all virtual machines. Hence it increases virtual machine
isolation in a multitenant environment, while not degrading access to public
network resources.
DHCP guard
DHCP guard drops server messages from unauthorized
virtual machines that are acting as DHCP servers. DHCP server traffic from
other virtual switch ports is automatically dropped. Thus it protects against
rogue DHCP servers.
Router guard
Router guard drops router advertisement and
redirection messages from unauthorized virtual machines that are acting as
routers. Hence it provides better security and an authorization check for
virtual machines.
Hyper-V Extensible Switch
The Hyper-V Extensible Switch is a
Layer 2 virtual network switch that provides programmatically managed and
extensible capabilities to connect virtual machines to the physical network.
The Hyper-V Extensible Switch is an open platform that lets vendors provide
extensions written to standard Windows application programming interface (API)
frameworks.
Extension monitoring
Multiple monitoring and filtering
extensions can be supported at the entrance and outlet portions of the Hyper-V
Extensible Switch. It Provides traffic visibility at different layers and
enables statistical traffic data to be gathered.
Non-Uniform Memory Access (NUMA) support inside virtual machines
Provides enhanced performance on large virtual machines by
enabling the guest operation system and applications to access local memory
faster than remote memory.
Single Root I/O Virtualization (SR-IOV) networking devices
Reduces network latency and host CPU
overhead (for processing network traffic); increases network throughput.
Windows Server 2012 Hyper-V enables support for SR-IOV-capable network devices
and allows the SR-IOV virtual function of a physical network adapter to be
assigned directly to a virtual machine.
Hyper-V smart paging
Provides a reliable way to keep virtual machines
running when there is not enough physical memory available. If a virtual
machine is configured with a lower minimum memory than its startup memory and
Hyper-V needs additional memory to restart it, Hyper-V smart paging is used to
bridge the gap between minimum and startup memory.
Runtime memory configuration
Provides flexibility to use Dynamic Memory as needed,
without affecting other virtual machines. Users can make configuration changes
to Dynamic Memory (increase maximum memory or decrease minimum memory) when a
virtual machine is running.
Resource Metering in Hyper-V
Resource Metering allows users to track how many CPU,
memory, storage, and network resources are consumed by a virtual machine over
time. This information is gathered automatically (without the need to
constantly collect data from the virtual machine) and persists with the virtual
machine through live migration/other mobility operations. Windows Server 2012
Hyper-V can track and report the amount of data transferred per IP address or
virtual machine.
Virtual hard disk format
VHDX supports up to 64 TB of storage. It helps to
provide protection from corruption due to power failures by logging updates to
the VHDX metadata structures. It also helps to prevent performance degradation
on
large-sector
physical disks by optimizing structure alignment. Helps
to ensure high quality performance on large-sector disks.
Offloaded data transfer
Windows Server 2012 Hyper-V uses SAN copy offload to
copy large amounts of data from one location to another. Allows the CPU to concentrate on the
processing needs of an application.
Provides rapid provisioning and migration of virtual machines.
Data Center Bridging (DCB)
Windows Server 2012 Hyper-V uses DCB capable hardware
to converge multiple types of network traffic onto a single network adapter, with
a maximum level of service to each. Helps
to reduce the cost and complexity of maintaining separate traffic for network, management,
live migration, and storage. Makes it
easy to change allocations to different traffic flows.
Virtual Fibre Channel in
Hyper-V
Virtual Fibre Channel in Hyper-V provides Fibre
Channel ports within the guest operating system.
Multipath I/O (MPIO)
functionality
Windows Server 2012 Hyper-V uses MPIO functionality
for proper connectivity to Fibre Channel storage within a virtual machine.
Support for 4 KB disk sectors
in Hyper-V virtual hard disks
This reduces the impact of 512e disks on the virtual
hard disk stack. Uses emerging innovation in storage hardware to increase
capacity and reliability.
Quality of Service (QoS)
Windows Server 2012 Hyper-V uses minimum bandwidth to
assign specific bandwidth for each type of traffic and to ensure fair sharing
during congestion. Enables hosting providers and enterprises to deliver
services with predictable network performance to virtual machines on servers
running Hyper-V. Reduces the need for expensive network adapters.
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