Dell Networking S6000 System Bedienungsanleitung PDF herunterladen (Seite 12)

12 Network Virtualization with Dell Infrastructure and VMware NSX | Version 1.2

Figure 6 VMware vSphere-only NSX components

A cluster is prepared for NSX in a two-step process.

1. The kernel modules for VXLAN, DLR, and firewall are installed on the compute and edge clusters.

2. VXLAN is configured on the compute and edge clusters. As part of the configuration, each host is

configured with a VTEP (virtual tunnel end point). This is where VXLAN encapsulation/de-

encapsulation occurs as packets are sent across the network.

Once the NSX and VXLAN configuration is completed, logical switches/networks can be created via NSX

Manger, NSX REST API, or a cloud management platform (CMP) such as VMware Cloud Automation

Center (vCAC). A logical switch is defined with a VXLAN unique identifier called a VNI which represents a

logical segment.

VMs on different hosts but on the same logical network are encapsulated with a VXLAN and UDP header

and sent over the physical underlay network. The outer IP header is all that the physical underlay network

sees; it is unaware of what VMs are talking to each other. Figure 7 below displays what a VXLAN

encapsulated frame looks like. It’s also important to note that any QoS bits within the encapsulated frame

are copied to the external header so the physical underlay network can respect the DSCP or CoS QoS

settings for different types of traffic. VMs on different logical networks can also communicate with each

other via a logical DLR or Perimeter Edge router without leaving the virtual environment.

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Dell Networking S6000 System Bedienungsanleitung Seite 12