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Nexus Switching 2nd Edition

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Chapter 9. Nexus 1000V<br />

This chapter covers the following topics:<br />

• Hypervisor <strong>and</strong> vSphere introduction<br />

• Nexus 1000V system overview<br />

• Nexus 1000V switching<br />

• Nexus 1000V installation<br />

• Nexus 1000V port profiles<br />

• Virtual Network Management Center (VNMC)<br />

• Virtual Security Gateway (VSG)<br />

• Virtual Extensible LAN VXLAN<br />

• Nexus 1000V port profiles<br />

• Network Analysys Module (NAM)<br />

Hypervisor <strong>and</strong> vSphere Introduction<br />

A hypervisor, also called a virtual machine manager, is a program that enables multiple<br />

operating systems to share a single hardware h<strong>os</strong>t. Each operating system appears to have<br />

the h<strong>os</strong>t’s processor, memory, <strong>and</strong> other resources. The hypervisor controls the h<strong>os</strong>t<br />

processor, memory, <strong>and</strong> other resources <strong>and</strong> allocates what is needed to each operating<br />

system. Each operating system is called a guest operating system or virtual machine<br />

running on top of the hypervisor.<br />

The Cisco Nexus 1000V Series Switch is a software-based Cisco NX-OS switch with<br />

intelligent features designed specifically for integration with VMware vSphere<br />

environments. As more organizations move toward cloud services, VMware vSphere<br />

manages collections of CPU(s), storage, <strong>and</strong> networking as a seamless <strong>and</strong> dynamic<br />

operating environment. The Nexus 1000V operates inside the VMware ESX hypervisor. The<br />

Cisco Nexus 1000V Series supports Cisco VN-Link server virtualization technology to<br />

provide<br />

• Policy-based virtual machine (VM) connectivity<br />

• Mobile VM security<br />

• Network policy<br />

• Nondisruptive operational model for your server virtualization <strong>and</strong> networking teams<br />

With the Nexus 1000V, virtual servers have the same network configuration, security policy,<br />

diagn<strong>os</strong>tic tools, <strong>and</strong> operational models as physical servers. The Cisco Nexus 1000V<br />

Series is certified by VMware to be compatible with VMware vSphere, vCenter, ESX, <strong>and</strong><br />

ESXi. VMware vCenter provides a single point of management for VMware virtual<br />

environments providing access control, performance monitoring, <strong>and</strong> configuration. The<br />

main difference between ESX <strong>and</strong> ESXi is that ESXi does not contain the service console.<br />

The Virtual Supervisor Module (VSM) can be deployed in high-availability mode; each

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