Tuesday, February 3, 2015

VMware NSX: Overview of the Software-Defined Data Center

In this blog we will see go over Software defined Data center and NSX networking. Source of material is various VMware Documents.


Today, enterprise business leaders want their IT to create applic ations quickly and easily. Enterprise
business leaders must decide whether to build in-house IT or to outsourc e their IT and applications

Businesses that want to deploy applications and their necessary server infrastructure quickly, choose between the current hardware based model and the software-defined data center




Advantage of Software-Defined Data Center

Providers are decoupled from physical infrastructure, allowing them to use any x86, any storage,
and any IP networking hardware. This approac h increases agility, reduces cost, and provides a
highly scalable infrastructure with a softwa re-defined data center approach.

The software-defined data center is similar to the approach taken by Amazon, Google, and
Facebook. This approach does not include a vertically integrated hardware-specific approach. For
example, with a hardware-centric infrastructure, you must buy in-unit networking hardware for the
network to function. With the software-defined data center approach, you can run any network
switch

Software-Defined Data Center as New IT




VMware NSX can do layer 2, SSL, and IPSEC VPNs. This functionality provi des business
continuance and disaster recovery capab ilities, which are not otherwise available. NSX can be
combined with VMware vCloud Hybrid Service" to provi de a hybrid cloud strategy.

Components of a Software-Defined Data Center

The software-defined data center extends the virtu alization concepts like abstraction, pooling, and
automation to all data center resources and services. Components of the software-defined data center
can be implemented together, or in phases:
• Compute virtualization, network virtualization, and software-defined storage deliver
abstraction, pooling, and automation of the compute, network, and storage infrastructure
services.
• Automated management delivers a framework for policy-based management of data center
application and services


NSX adds nothing to the physic al switching environment. NSX exists in the ESXi environment and
is independent of the network hardware


Network Virtualization: Layer 2: layer 2 connectivity between two virtual machin es on the same
hypervisor and host. Traffic on the layer 2 network never leaves the hypervisor



Network Virtualization: Layer 3

NSX virtualizes the layer 3 connectivity between two virtual
machin es on the same hypervisor and host. NSX virtualizes the layer 3 connectivity in different IP
subnets and logical switch es without leaving the hypervisor to use a physical router. This virtualization also provides routing between two virtual machin es on two different sides of the data
center across multipl e layer 3 subnets and availability zone


Thats the overview

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