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Configuration Guide - VXLAN

CloudEngine 12800 and 12800E V200R003C00

This document describes the configurations of VXLAN.
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Configuring IPv6 VXLAN in Centralized Gateway Mode for Static Tunnel Establishment

Configuring IPv6 VXLAN in Centralized Gateway Mode for Static Tunnel Establishment

When VXLAN in centralized gateway mode for static tunnel establishment is deployed, traffic across network segments is forwarded through Layer 3 VXLAN gateways to implement centralized traffic management.

Usage Scenario

An enterprise has deployed an IPv6 network and allocated VMs in different locations to a tenant. Some of the VMs reside on the same network segment, and the others reside on different network segments. To allow communication between VMs, deploy VXLAN Layer 2 and Layer 3 gateways and establish IPv6 VXLAN tunnels.

On the network shown in Figure 9-1, Server 2 and Server 3 belong to the same network segment and access the IPv6 VXLAN through Device 1 and Device 2, respectively; Server 1 and Server 2 belong to different network segments and both access the IPv6 VXLAN through Device 1.
  • To enable communication between VM 1 on Server 2 and VM 1 on Server 3, deploy VXLAN Layer 2 gateways on Device 1 and Device 2 and establish a VXLAN tunnel between Device 1 and Device 2 so that tenants on the same network segment can communicate.
  • To enable communication between VM 1 on Server 1 and VM 1 on Server 3, deploy a VXLAN Layer 3 gateway on Device 3 and establish VXLAN tunnels between Device 1 and Device 3 and between Device 2 and Device 3 so that tenants on different network segments can communicate.

Either IPv4 or IPv6 addresses can be configured for VMs and the VXLAN Layer 3 gateway. This means that a VXLAN overlay network can be an IPv4 or IPv6 network. Figure 9-1 shows an IPv4 overlay network.

Figure 9-1 VXLAN in centralized gateway mode

Pre-configuration Tasks

Before configuring IPv6 VXLAN in centralized gateway mode for static tunnel establishment, ensure that the IPv6 network is reachable at Layer 3.

Configuration Procedures

Figure 9-2 Flowchart of configuring VXLAN in centralized gateway mode

NOTE:

If only VMs on the same network segment need to communicate with each other, Layer 3 VXLAN gateways do not need to be deployed. If VMs on different network segments need to communicate with each other or VMs on the same network segment need to communicate with external networks, Layer 3 VXLAN gateways must be deployed.

The following table lists the differences between the centralized gateway configuration procedures for an IPv4 overlay network and an IPv6 overlay network.

Differed Configuration Task

IPv4 Overlay Network

IPv6 Overlay Network

Configure a VXLAN Layer 3 gateway.

Configure an IPv4 address for a VBDIF interface.

Configure an IPv6 address for a VBDIF interface.

(Optional) Configure static ARP/IPv6 neighbor/MAC address entries and MAC address limiting.

Configuring static IPv6 neighbor entries is not supported.

Configuring static ARP entries is not supported.

(Optional) Configuring Layer 2 Proxy ARP

Supported

Not supported

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Updated: 2019-05-05

Document ID: EDOC1100004207

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