What is NSX VMware? A blog that covers all the basics about NSX, what it does and how it works.

(NSX VMWARE) NSX is a virtual networking solution from VMware that allows administrators to create, configure and manage virtualized network infrastructures. NSX’s goal is to provide greater visibility of the network, security and service delivery across physical and virtual environments while ensuring increased performance. It includes a software-defined network interface that can be implemented by moving common networking services from traditional “blue” switches and routers, to the ESXi host level.

NSX is designed towards using Megaframework capabilities in VMware vSphere 4 virtualization platform for data centres which allows organizations to build more efficient networks utilizing existing resources. In any type of organization, there are multiple layers deployed across the infrastructure including physical servers, hosts (ex/OVD), storage devices or endpoint data centre equipment such as firewalls and load balancers then back into the application layer where most businesses centrally store data.

Typically data centre network appliances like routers and switches are present at each of the different layers with certain numbers defined for every layer. NSX is used to manage these networks; it allows administrators to configure multiple physical addresses (IP’s).

NSX VMware

NSX Overview (NSX VMware)

The NSX is a virtual switch that links networks together and creates visibility into the entire network. It can be used to create new applications for networking, such as SD-WAN, and it is more reliable than an IP-based LAN because of its cloud architecture. The NSX also facilitates security with its firewall capabilities.

NSX Architecture

Nexus is a networking platform developed by Cisco Systems, Inc. It offers virtual switching and routing functionality. Nexus switches are Layer 3 to layer 7 devices that can integrate with other software components such as Service Intelligence for service chaining, Quality of Service (QoS), and Unified Communications. The device comprises a switch fabric that provides a shared interface into the packet-processing engine to enable rapid network forwarding.

NSX Components

A virtualized compute infrastructure is a computing environment where the physical hardware is partitioned and interconnected by software, creating a grid of virtual machines that may be managed as a single system. This allows for greater utilization of these resources without having to purchase or maintain redundant computer systems.

One benefit of this infrastructure is faster response time since user requests can be fulfilled from different servers thus alleviating bottlenecks from user-to-computer connections. Another advantage is the ability to move workloads between data centres or cloud providers more easily, which provides elasticity to their variable demand.

NSX Services

NSX is VMware’s virtualized network infrastructure. The NSX Services component allows for the creation of a virtual environment with private and public networks. This model provides a secure and reliable layer 2 platforms that can be scaled to meet any business need.

NSX Unifying Layer

The NSX Unifying Layer is the collection of components that make up the core fabric of NSX. This layer is responsible for connecting virtual or physical servers to compute nodes in the data centre, providing a connection between the data centre and its external network. These components include switches, routers, firewalls, load balancers and other services. Additionally, this layer houses several key features that help improve security and provide insights into performance in order to better manage IT infrastructure.

Nexus 1000v VDS with NSX-T/ESXi on vSphere 6.5

The Nexus 1000v virtual data centre switch is a unified Ethernet and Fibre Channel fabric switch. It can provide dedicated load balancing, high-density port aggregation, and advanced processing over converged Ethernet and Fibre Channel fabrics. The Nexus 1000v VDS with NSX-T/ESXi on vSphere 6.5 is a virtual data centre that provides network services such as Layer 2 switching, routing, firewall, load balancing and traffic monitoring to the VMware ESXi servers in your virtual environment.

VMs and NSX Edges

NSX Edge contains a number of features that enable it to be used as a deployment platform for NSX. In addition to being able to run the NSX Controller, NSX Edges can also run compute nodes in vSphere clusters and can even host VMware Photon OS VMs. When running on an Edge, the controller will not control anything outside of the physical network interfaces on the node; no virtual machines will be managed by the controller and any VM deployed on an Edge is limited to what can be configured by VMware Tools.

Logical Switches in NSX-T/ESXi

A logical switch can be used to connect multiple physical NICs to a single virtual machine or container. The advantage of using a logical switch is that they allow for the creation of port groups with specific rules and policies, each group with its own resources and capabilities.

Networking Policies in NSX-T/ESXi

Networking Policies in NSX-T/ESXi are a set of rules that define the behaviour of a network. A networking Policy is a collection of rules that dictate how traffic will be routed through a virtual machine via a specific transport zone or applied to the physical interface on the host. There are three types of networking policies: Host-based, Transport Zones and Policy Templates.

Host-based policies have been introduced with NSX-T v1.7 as an additional extension to the existing NSX features. The policy can also be applied to physical interfaces on hosts, by using a vSphere Distributed Switch.

Data Center Bridging in NSX-T/ESXi

Network Virtualization Edge (NVE) is a distributed edge network that provides connectivity for virtual machines and container workloads. NVE distributes traffic across the fabric and creates a single point of communication and unified security and policy enforcement to make communication easy. NSX-T has built-in support for NVE, which you can deploy without any additional software or hardware.

Virtual Distributed Switching (VDS) for ESXi Hosts with an Onboard Nexus 1000v

VDS is the Virtual Distributed Switching software that provides

overlapping connectivity to networks that are located in

different virtual data centres, or in different physical locations. VDS allows

a single hypervisor host to connect to multiple networks through a single,

virtual switch.

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