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The "xosIpAddress" is the IP address of XOS. The "xosRestPort" is the port of XOS for vBNG to fetch the mapping record. This function is used for vBGN reboot, we should recovery the vBNG status from the XOS' record.
Proxy ARP Configuration
When we configure each host with an IP address (the IP address is private IP address), we also configure the gateway IP address on each host. Then the host will send out ARP packets to look for the MAC address of the gateway. Since there is no physical gateway, we will use proxy ARP application to handle those ARP requests.
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