Cloud networking

GRE vs. NAT

GRE vs. NAT

Packet encapsulation (GRE) and packet rewrite (NAT) are the two address translation mechanisms included in Microsoft Hyper-V Virtual Network implementation

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Network Virtualization and Multi-Tenancy concept (Cloud Network)

Cloud Network Topologies

Network virtualization and Multi-Tenancy virtual infrastructure provides the capability to run multiple virtual network infrastructures on the same physical network, and each virtual network infrastructure operates as if it is the only virtual network running on the shared network infrastructure.

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Single-Root I/O Virtualization

Single-Root I/O Virtualization

SR-IOV is a hardware solution based on PCI-SIG I/O Virtualization (IOV) specifications that is designed to replace the role of software in virtual machine connectivity and leverage hardware features to scale up hosts more, to accelerate performance, to reduce latency,

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Windows 2012 NIC Teams

What is NIC teaming?

It is a group NICs together to act as a single unit.
Some Advantage of NIC Teaming:

Load Balancing When we have two or more NICs, we can distribute and balance the network traffic across each NIC in a team.
Hint: when you team together two 10 GbE NICs, you don’t get a 20 GbE pipe, Instead you get the ability to distribute traffic across two 10 GbE NICs

Failover Services that are important to the business usually have a service-level agreement (SLA) indicating that they must be available to the customer a certain percentage of the time.
To avoid single faulty switch to bring down the entire service by affecting network s availability; it is a Network features like fault-tolerant storage and highly available Hyper-V hosts

There is no need any more for hardware manufacture NIC Team solution, which was not supported by Microsoft.

NIC Team is a feature added to Microsoft windows 2012, and it is hardware independent; that mean you can build NIC team even by using different model, from any manufacturer and can even be of different speeds(not recommended).

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Microsoft adding Cloud networking functionality to Windows Server 2012

Hyper-V Networking

Microsoft adding Cloud networking functionality to Windows Server 2012

In addition to newly added Distributed switch in windows 2012, there are three kinds of virtual switches in windows Hyper-V, and each kind will connect the virtual NICs of virtual machines to a different kind of network.

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