Milestone XProtect Advanced VMS 2014 - Manual (Page 71)

Milestone XProtect ® Advanced
VMS 2014
Administrator's Manual
www.milestonesys.com 71 Management Client elements
Name Description
Primary failover server group /
Secondary failover sever
group
Select a regular failover setup with one primary and possibly one
secondary failover server group. Also, from the attached dropdown,
select a primary failover group and possibly a secondary failover
group.
Hot standby server
Select a hot standby setup. Also, from the dropdown, select a hot
standby server.
Advanced failover settings
Opens the Advanced Failover Settings window.
 Full Support: Select to get full failover support for the device.
 Live Only: Select to get live failover support for the device.
 Disabled: Select to disable failover support for the device.
Failover service
communication port (TCP)
By default, the port number is 11000. You use this port for
communication between recording servers and failover recording
servers. If you change the port, the recording server must be
running and must be connected to the management server.
Multicast tab (recording server)
Your system supports multicasting of live streams from recording servers. If mulitple XProtect Smart
Client users want to view live video from the same camera, multicasting helps saving considerable
system resources. Multicasting is particularly useful if you use the Matrix functionality, where multiple
clients require live video from the same camera.
Multicasting is only possible for live streams, not for recorded video/audio.
If a recording server has more than one network interface card, it is only possible to use multicast on
one of them. Through the Management Client you can specify which one to use.
The successful implementation of multicasting also requires that you have set up your network
equipment to relay multicast data packets to the required group of recipients only. If not, multicasting
may not be different from broadcasting, which can significantly slow down network communication.
About multicasting
In regular network communication, each data packet is sent from a single sender to a single recipient -
a process known as unicasting. But with multicasting you can send a single data packet (from a
server) to multiple recipients (clients) within a group. Multicasting can help save bandwidth.

When you use unicasting, the source must transmit one data stream for each recipient.

When you use multicasting, only a single data stream is required on each network segment.
Multicasting as described here is not streaming of video from camera to servers, but from servers to
clients.
With multicasting, you work with a defined group of recipients, based on options such as IP address
ranges, the ability to enable/disable multicast for individual cameras, the ability to define largest