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AR500, AR510, and AR530 V200R007 CLI-based Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring transparent bridge, MAC table, link aggregation, VLANs, STP/RSTP/MSTP, and so on.The document provides the configuration procedures and configuration examples to illustrate the service configuration methods and application scenario.
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Basic Concepts

Basic Concepts

VXLAN is an NVO3 network virtualization technology that encapsulates data packets sent from virtual machines (VMs) or physical servers into UDP packets and encapsulates IP and MAC addresses used on the physical network in outer headers before sending the packets over an IP network. The egress tunnel endpoint then decapsulates the packets and sends the packets to the destination VM or physical server.

Figure 6-1  VXLAN architecture

With VXLAN deployed, a virtual network can accommodate a large number of tenants. Tenants can plan their own virtual networks, not limited by the physical network IP addresses or broadcast domains. This greatly simplifies network management. The following describes basic VXLAN concepts, as shown in Figure 6-1.

  • VXLAN tunnel endpoint (VTEP): A VXLAN tunnel endpoint that encapsulates and decapsulates VXLAN packets.

    A VTEP connects to a physical network and is assigned a physical network IP address. This IP address is irrelevant to virtual networks.

    In VXLAN packets, the source IP address is the local node's VTEP address, and the destination IP address is the remote node's VTEP address. This pair of VTEP addresses corresponds to a VXLAN tunnel.

  • VXLAN network identifier (VNI): A VXLAN segment identifier similar to a VLAN ID. VMs on different VXLAN segments cannot communicate at Layer 2.

    A VNI identifies only one tenant. Even if multiple terminal users belong to the same VNI, they are considered one tenant. A VNI consists of 24 bits and supports a maximum of 16M tenants.

Updated: 2019-05-25

Document ID: EDOC1000097279

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