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

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Chapter 10. OVN and Open vSwitch Enhancements

In Chapter 3, SDN Protocols, we introduced Open vSwitch (OVS) the most popular virtual switch in OpenStack deployment and in Chapter 4, SDN Networking with Open vSwitch, we peeked under the hood to gain insights on the building blocks of OpenFlow based networking with Open vSwitch, discussing how it communicates with SDN controllers and interfaces with OpenStack Neutron. This chapter aims to build on this to gain understanding on Open vSwitch packet flows in OpenStack Neutron. It will start with introducing various interfaces, such as br-int, br-tun, and br-ex, and explain how Neutron uses these OVS switches to offer networking as a service.

SDN at layer 2 and 3 along with Network Function Virtualization ...

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