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Software-Defined Networking (SDN) with OpenStack by Sreenivas Voruganti, Sriram Subramanian

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OpenContrail architecture

The architecture of OpenContrail can be broken up into two main components:

  • vRouter
  • Controller

Let us examine each of these components in detail.

vRouter

The vRouter is the main component in the forwarding plane of OpenContrail. The vRouter runs on the Compute Nodes and acts as a virtual switch as well as a virtual router. It forwards the traffic to and from the virtual machines running on the Compute Node. Since OpenContrail is based on an overlay network architecture, the vRouter acts as the endpoint for overlay networks.

The vRouter is analogous to the Open vSwitch (OVS) when compared with an OpenDaylight-based SDN architecture. While OVS supports protocols like OpenFlow to program the forwarding plane, the vRouter uses ...

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