Extron electronics SMP 300 Series User Manual page 155

Multicast Streaming Method — An Overview
This streaming method is used for live video multicasting with low latency in a "one‑to‑many"
streaming session. The SMP 300 Series uses a variety of streaming protocols to send data
to a multicast group. Using multicasting, the SMP 300 Series does not need to know the IP
address of the devices viewing the stream. This allows a large number of users to view the
data simultaneously while using bandwidth efficiently. The maximum number of connected
users is dependent on the type of distribution network used.
NOTE: To use this streaming method, each network must be configured to pass
multicast broadcasts.
Multicast streaming can use push or pull streaming. It can push the data to a network for
broader distribution, or to many individual viewing devices. It can also use pull streaming,
where the SMP 300 Series waits for viewing devices to request the stream before
broadcasting.
Streaming
Protocol
SMP 300 Series
(encoder)
SMP 300 Series sends data
to a multicast group.
Figure 97. Multicast Streaming
NOTE: IGMP (Internet Group Management Protocol) multicast protocol is used by
routers and switches to deliver streams to subscribing endpoints. The SMP 300 Series
delivers packets and frames onto the network that are identified as multicast. An IGMP
multicast conserves network bandwidth because the SMP 300 Series only sends data
when a connection is made by a user. All network switches and routing equipment
must be properly configured to support IGMP snooping and IGMP query to avoid
flooding all endpoints with unnecessary streaming traffic.
Streaming
Protocol
NETWORK
Streaming
Protocol
Streaming
Protocol
Streaming
Protocol
Streaming
Protocol
SMP 300 Series • Reference Information
Viewing
device
Viewing
device
Viewing
device
Viewing
device
Additional
devices
Multiple devices can be
part of the multicast group.
147