2
Network AV Infrastructure Prerequisites
N
ETWORK AV
I
NFRASTRUCTURE
P
REREQUISITES
This section is intended to provide a basic understanding of applicable networking technologies and the infrastructure
requirements needed for a successful Visionary Solutions Encoder/Decoder/MV4 system installation, and to ensure a rapid
deployment and seamless integration. Many network issues can be minimized or solved before they occur with appropriate
knowledge and proper planning.
The MV4 will work with most non-blocking, IGMP with IGMP Snooping, 8K or better Jumbo Packet 1GbE network switches. At
least one layer-3 switch with IGMP-query capability is required. For PIM (multicast routing) of MV4 video streams, the network
switches would need to be capable of PIM (Sparse, Dense, or Sparse-Dense).
Do
not
connect
any
encoders
or
decoders
to
a
switch
until
the
switch
is
configured
for
multicasting
and
IGMP
Snooping
is
enabled. Check with your switch manufacturer for the default configuration settings.
N
ETWORK
P
ROTOCOLS
All data on a network is encapsulated in packets, according to the TCP/IP protocols. Data packets are routed through the
network to their destination(s) by switches using information in the header of IP packets. Transmission can be unicast or
multicast. Unicast transmissions are point-to-point, from a single source to a single destination. Multicast transmissions
originate from a single device and are received by a group of devices on the network, according to the Internet Group
Management Protocol (IGMP). Multicast transmission is ideal for bandwidth-intensive application such as media distribution as
it allows for efficient use of network bandwidth. Only a single copy of the data is distributed to multiple destinations. On the
other hand, unicast distribution of media to multiple destinations is an extremely inefficient use of network bandwidth because
duplicate copies of the data are sent, point-to- point, from the source to each destination. Encoder/Decoder/MV4 devices make
use of the multicast protocol. More information concerning IGMP may be found here at:
http://docwiki.cisco.com/wiki/Internet_Protocol_Multicast#Internet_Group_Management_Protocol
There are two ways to implement multicast routing when using our equipment:
•
IGMP
(Internet Group Management Protocol): Allows video streams (groups) to be dynamically routed only to those
ports requesting the video stream. The IGMP feature prevents the multicast video traffic from flooding the network
and can significantly reduce traffic in a layer-3 network. This is the recommended setting for our equipment.
•
PIM
http://docwiki.cisco.com/wiki/Internet_Protocol_Multicast#Protocol-
Independent_Multicast
.
N
ETWORK
R
EQUIREMENTS
For help determining the network requirements for your Visionary Solutions installation, please contact
S
WITCH
S
PEED
The E4100 encoder will produce up to 800Mb/s of data. Therefore, 10 encoders will require 10 x 800MB/s = 8Gbps.
Encoder/Decoder/MV4 requires the switch to be GbE. Encoder/Decoder/MV4 technology is used to transmit visually lossless
8~10:1 compressed video up to 4K along with other AV signals such as audio, USB, and control signals. For video alone, this means
raw bandwidth of up to 800Mbps for 4K.
C
HOOSING AN
E
THERNET
S
WITCH
Switches must support these functions:
•
Gigabit Ethernet
•
Jumbo Frames (enabled)
•
IGMP Snooping
•
IGMP Querier
•
IGMP Snooping Fast Leave
If the switches are used for multi-switch networking, they must also support PIM Routing (Sparse, Dense, or Sparse-
Dense). These features may be helpful as well:
Содержание MV4
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