Vivotek NR9682-v2 64-Channel NVR (No HDD) - Manual (Page 235)

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User's Manual - 235
* To enable multicasting, your network infrastructure must support the IP multicasting standard
IGMP (Internet Group Management Protocol). Your server and clients should be on the the same
network segment.
* Multicasting is only possible for live streams, not applicable to the recorded video or audio.
* Multicast streams are not encrypted, even if the the recording server uses encryption.
* The IPv4 multicast address range is: 224.0.0.0 to 239.255.255.255.
* A layer 2 network switch that supports IGMP is required in the configuration.
* If the streaming connection for a sub-station is configured as CMS Relay , you should configure the
multicasting settings on the CMS server.