Deployment Guide

VXLAN

A virtual extensible LAN (VXLAN) extends Layer 2 (L2) server connectivity over an underlying Layer 3 (L3) transport network in a

virtualized data center. A virtualized data center consists of virtual machines (VMs) in a multi-tenant environment. OS10 supports VXLAN

as described in RFC 7348.

VXLAN provides a L2 overlay mechanism on an existing L3 network by encapsulating the L2 frames in L3 packets. The VXLAN-shared

forwarding domain allows hosts such as virtual and physical machines, in tenant L2 segments to communicate over the shared IP network.

Each tenant L2 segment is identified by a 24-bit ID called a VXLAN network identifier (VNI).

Deployed as a VXLAN gateway, an OS10 switch performs encapsulation/de-encapsulation of L2 frames in L3 packets while tunneling

server traffic. In this role, an OS10 switch operates as a VXLAN tunnel endpoint (VTEP). Using VXLAN tunnels, server VLAN segments

communicate through the extended L2 forwarding domain.

Figure 1. VXLAN topology

Topics:

• VXLAN concepts

• VXLAN as NVO solution

• Configure VXLAN

• L3 VXLAN route scaling

• DHCP relay on VTEPs

• View VXLAN configuration

• VXLAN MAC addresses

• VXLAN commands

• VXLAN MAC commands

• Example: VXLAN with static VTEP

VXLAN concepts

Network

virtualization

overlay (NVO)

An overlay network extends L2 connectivity between server virtual machines (VMs) in a tenant segment over an

underlay L3 IP network. A tenant segment can be a group of hosts or servers that are spread across an underlay

network.

6 VXLAN