User Manual of Digital Video Recorder1344. Click the Apply button to save and exit the interface.9.2.7 Configuring MulticastPurpose:The multicast can be configured to realize live view for more than 128 cameras through network.A multicast address spans the Class-D IP range of 224.0.0.0 to 239.255.255.255. It is recommended to use the IPaddress ranging from 239.252.0.0 to 239.255.255.255.Steps:1. Enter the Network Settings interface.Menu > Configuration > Network2. Select the More Settings tab to enter the More Settings interface.3. Set Multicast IP. When adding a device to the CMS (Client Management System) software, the multicastaddress must be the same as the DVR‟s multicast IP.Figure 9. 20 Configure Multicast4. Click the Apply button to save and exit the interface.9.2.8 Configuring RTSPPurpose:The RTSP (Real Time Streaming Protocol) is a network control protocol designed for using in entertainment andcommunications systems to control streaming media servers.Steps:1. Enter the Network Settings menu:Menu > Configuration > Network2. Select the More Settings tab to enter the More Settings menu.Figure 9. 21 RTSP Settings Interface3. Enter the RTSP port in the text field of RTSP Service Port. The default RTSP port is 554, and you canchange it according to different requirements.4. Click the Apply button to save and exit the menu.9.2.9 Configuring Server and HTTP PortsPurpose:You can change the server and HTTP ports in the Network Settings menu. The default server port is 8000 andthe default HTTP port is 80.