Performance Series Network Video Recorder User Guide 
 
188 
Multicast 
Multicast is a transmission mode for data packets. When there are multiple hosts to receive 
the same data packets, multiple cast is the best option for reducing the bandwidth and the 
CPU load. The source host can send out just one data for transit. This function also depends 
on the relationship of the group member and the router group. 
1.  Click Multicast under NETWORK to open the Multicast configuration interface. 
Figure 12-58 Multicast Configuration Interface 
 
2.  Select Enable to enable multicast. 
3.  Enter a multicast IP address in the IP Address box. The address must be valid for 
multicasting and should be in the range 224.0.0.0 to 239.255.255.255 for IPv4 or have 
the prefix ff00::/8. An address in the range 239.252.0.0 to 239.255.255.255 is 
recommended. 
4.  Enter a multicast port number in the Port box, or use the default setting (36666). 
5.  Click OK to save your settings. 
Register 
Register allows the device to automatically register to the proxy you have specified. This 
allows you to use the client-end to access the NVR through the proxy. The proxy acts as a 
switch. In network service, the device supports IPv4 server addresses or domains. 
1.  Click Register under NETWORK to open the Register configuration interface. 
Figure 12-59 Register Configuration Interface 
 
2.  Click to enable Register. 
3.  Enter Host IP, Port, and Sub device ID values. 
4.  Click OK to save the settings.