Milestone XProtect Advanced VMS 2014 - Manual (Page 72)

Milestone XProtect ® Advanced
VMS 2014
Administrator's Manual
www.milestonesys.com 72 Management Client elements
acceptable data packet size (MTU), the maximum number of routers a data packet must be forwarded
between (TTL), and so on.
Multicasting should not be confused with broadcasting, which sends data to everyone connected to
the network, even if the data is perhaps not relevant for everyone:
Name Description
Unicasting Sends data from a single source to a single recipient.
Multicasting
Sends data from a single source to multiple recipients within a
clearly defined group.
Broadcasting
Sends data from a single source to everyone on a network.
Broadcasting can therefore significantly slow down network
communication.
Enable multicasting
To use multicasting, your network infrastructure must support the IP multicasting standard IGMP
(Internet Group Management Protocol).

On the Multicast tab, select the Multicast check box.
If the entire IP address range for multicast is already in use on one or more recording servers, you first
release some multicast IP addresses before you can enable multicasting on additional recording
servers.
Assign IP address range
Specify the range you want to assign as addresses for multicast streams from the selected recording
server. The clients connect to these addresses when the users view multicast video from the recording
server.
For each multicast camera feed, the IP address and port combination must be unique (IPv4 example:
232.0.1.0:6000). You can either use one IP address and many ports, or many IP addresses and fewer
ports. By default, the system suggests a single IP address and a range of 1000 ports, but you can
change this as required.
IP addresses for multicasting must be within the range defined for dynamic host allocation by IANA.
IANA is the authority overseeing global IP address allocation.
Name Description
IP address
In the Start field, specify the first IP address in the required range.
Then specify the last IP address in the range in the End field.
Port
In the Start field, specify the first port number in the required range.
Then specify the last port number in the range in the End field.