The XNV feature supports file synchronization between XNV-enabled switches and the repository server. The files stored on the repository server include the .map, .vpp, and .pol files. One of the advantages of the repository server is that multiple XNV-enabled switches can use the repository server to collect the network VM configuration files. The XNV feature provides for access to a secondary repository server if the primary repository server is unavailable.
Through file synchronization, the network files are periodically downloaded to the XNV-enabled switches, which allows these switches to continue to support VM authentication when the NMS server is unavailable.