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Bgp At Doors of Autonomous Systems is Simple (badass)

Simulate multiple VxLAN networks and configure them using GNS3 with docker images

Introduction

VxLAN is an encapsulation protocol that provides data center connectivity using tunneling to stretch Layer 2 connections over an underlying Layer 3 network. In data centers, VxLAN is the most commonly used protocol to create overlay networks that sit on top of the physical network, enabling the use of virtual networks.

Part 1

Discovering the bare-bones of a VxLAN network

  • Dockers OS Selection
    • alpine for hosts
    • frrouting for routers
  • Router services configuration via vtysh shell
    • BGPD
    • OSPFD
    • IS-IS
  • Host configuration
    • Busybox software suite

p1 screen

p1_2 screen

Part 2

Set up a basic network model with multicast VxLAN enabled

  • First in static unicast then in dynamic multicast
  • The network must be using a VxLAN with an ID of 10
  • Setup br0 to act like a bridge between eth1 and the vxlan interface

p2 screen

Part 3

Set up a more advanced network and explore the principe of the BGP EVPN

  • The network must be using a VxLAN with an ID of 10
  • We are going to use the principle of the route reflection
  • Our leafs will be configured to have dynamic relations.
  • To simplify the evaluation, we must choose OSPF service instead of IS-IS
  • leafs routers must be able to automatically discover the MAC addresses of functional machines, type 2 routes must be created accordingly

p3 screen

Notes

  • All parts are pushed with a readme.txt file that explains the config files
  • GNS3 Projects for all parts are available through PX.gns3projet
  • Through the whole project, we consider the network in the same autonomous system (AS) only iBGP services are involved for router communication