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OpenStack Networking Cookbook by Chandan Dutta Chowdhury, Sriram Subramanian

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Configuring Neutron to use a VXLAN type driver

Virtual eXtensible LAN (VXLAN) is one of the overlaying drivers supported by the Neutron ML2 plugin. The process of tunneling involves encapsulating the data packets from the VM in a UDP packet. The VXLAN encapsulation process adds a special key called Virtual Network Identifier (VNI) in order to identify the network to which the data packet belongs.

The OVS instance on the Hypervisor is responsible for encapsulating the data packets coming out of the VM. The Neutron ML2 plugin provides the OVS instance with all the information that is required to implement a virtual network using VXLAN. For example, the plugin provides information such as the VNI and IP address for the Virtual Tunnel End Point ( ...

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