ZacharyGong / hello-network-virtualization

hello network virtualization

Lab

This is a tutorial about different network virtualizatioin technologies:

• Linux Devices
  • Tap Manipulation
  • Namespace-VETH-Namespace Communication
• Linux Bridge
  • Namespace-Bridge-Namespace Communication
  • Namespace-Bridge-Internet Communication
  • ???Namespace-Bridge-Namespace-Bridge-Internet Communication
  • VM-Bridge-VM Communication
  • ???VM-Bridge-Internet Communication
• OpenVSwitch
  • OpenVSwitch Manipulation
  • Namespace-OVS-Namespace Communication
  • Namespace-OVS-Namespace Communication bis
  • Namespace-OVS-Internet Communication
  • ???Namespace-OVS-Namespace-OVS-Internet Communication
  • VM-OVS-VM Communication: KVM
  • VM-OVS-VM Communication: Libvirt
  • Multi-Namespace-Br-OVS Scenario
  • FlowTable Pipeline
  • VXLan Tunneling

Commands

ovs-vsctl

• ovs-vsctl add-br sw: add a new OVS bridge
• ovs-vsctl list bridge sw: lookup
• ovs-vsctl del-br sw: remove the bridge
• ovs-vsctl show: show the OVS configuration of a server
  • OVS manager is for the whole server
  • OVS controller is for a dedicated switch

ovs-ofctl

• ovs-ofctl dump-flows sw: show all the flow tables
  • table=0: output for one table
  • --color: don't work for ssh
• ovs-ofctl del-flows sw: cleanup the flow tables
• authorize all IP flows between 1 and 2:

ovs-ofctl add-flow sw arp,actions=normal
ovs-ofctl add-flow sw priority=800,ip,nw_src=8.8.8.7,nw_dst=8.8.8.8,actions=normal
ovs-ofctl add-flow sw priority=800,ip,nw_src=8.8.8.8,nw_dst=8.8.8.7,actions=normal

• ovs-ofctl dump-flows sw: show the flow tables