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20171018_DockerConEu17_2

20171018_DockerConEu17_2

• 2 - Deep dive into overlay network
• 2.1 - Intro
  • What is an overlay network ?
  • How does it work ?
  • Demo
• 2.2 - VxLan Controle planes
• 2.3 - BGP dynamic Control Plane
  • Intro
  • BGP
  • Demo
• 2.4 - Getting out of VxLan

2 - Deep dive into overlay network

https://github.com/lbernail/dockercon2017

2.1 - Intro

What is an overlay network ?

How does it work ?

Demo

Merged in Kernel
-> Available through “classic” tools

• ip netns add overns # Create a NetSapce
• ip netns exec overns ip link create ... # Create link in the NS
• ip netns exec overns ip address add ... # Give address

2.2 - VxLan Controle planes

• MultiCast
• P2P
• User-land

=> Video: DockerCon Austin 2017

2.3 - BGP dynamic Control Plane

Intro

Option4

++
* bgpd + evpn for L2 and L3
* Standards and supported by SDNs

–
* Requieres knowledge

BGP

• Routing protocol
• Is an EGP
• We will ise iBGP (Internal)

Evpn
* Parts of MG-BGP

Demo

• Quagga
• Containerized (cumulusnetworks/quagga:CL3.2.1_evpn)

• --priviliged

• VxLan setup

• Bridge
• VxLAN ID

• In the QUAGGA container

• Connect 2 containers through Quagga

• eth0 -> br42

-> ControlPlane
-> DataPlane

Advantage
* ARP
* Broadcat (DHCP)
* Multicast

2.4 - Getting out of VxLan

• Gateway machine running Quagga
• Adding a veth with NAT
• …