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The important settings for Multicast are:
•
Sender/Receiver
– Determines whether this particular ACCESS is designed to generate the IP
Multicast stream (send) or decode one (receive).
•
Encoder Type
– Determines the type of stream to be used by the Multicast Encoder (not relevant
for decoders).
In addition to the basic options for
IP Multicast
profiles, clicking the
Advanced
box will allow setting of the same
Advanced Options
available for N
ormal BRIC
(
Unicast
) profiles.
SEttINg up A MultICASt rEMotE
All Multicast connections are outgoing connections . A Multicast Sender must initiate an outgoing stream, and a
Multicast Receiver must initiate an incoming one. These remotes are configured within a special address range known as
a Multicast Block, typically 224.0.0.0 to 239.255.255.255. To establish a Multicast connection, simply define a remote as
having an address within the IP Multicast Block, use an IP Multicast profile, and press
Connect
.
tIME-to-lIVE
Time-to-Live (TTL) is a variable set by Multicast encoders to determine how long a packet is processed before it is
dropped by the network. The default value of TTL in ACCESS is
0
, which limits its use to within a LAN environment. TTL
may be manually changed on a Multicast Sender remote by configuring the IP address followed by a “/” (forward slash),
followed by the TTL value.
As an example, a remote Multicast encoder could be set for the address
224.0.2.4/255
, which would signify an address
with the Multicast Block with a TTL of
255
(which is the max value available).
ChANgINg port NuMbErS For MultICASt
The default port of UDP 9000 may also be changed on Multicast remotes. The port number is assigned in the usual way,
directly after the IP address, preceded by “:”, followed by the TTL. As an example, the IP address of a Multicast Sender on
port
443
with a TTL of
100
would read:
224.0.2.4:443/100
