Port Number; Choosing An Ip Address - Extron electronics SMP 300 Series User Manual

Port Number

A port number is combined with the IP address to create an application‑specific or
process‑specific address. The port number can uniquely identify an application or process
on a computer and thereby enable the computer to share a single Ethernet connection
for multiple requirements. A port number is always associated with the IP address of the
computer, as well as the type of protocol used for network communication.
The SMP uses specific ports, but can be configured to meet most requirements. In addition
to the default ports, any port in the available range (1024 to 65535) can be used.
NOTE: Ports previously assigned and currently in use by the SMP cannot be used
again.
All streaming methods (except TS/UDP push) use multiple port numbers. The following
table shows the number of ports used by each streaming method. Archive and confidence
streams have different port numbers.
Unicast (per stream)
Multicast
* 4 ports for "Audio/Video", or 2 ports for "Video only"
When the SMP 300 Series ports are configured, only the initial port is entered by the user.
The SMP 300 Series firmware then assigns the multiple port numbers based on the initial
port number.

Choosing an IP Address

If the SMP 300 Series and other devices are connected via an independent network,
then follow the guidelines below when choosing IP addresses. However, if the SMP 300
Series and other devices are being connected to an existing network, advise the network
administrator and ask them to assign suitable addresses.
On an independent network, nearly any type of address can be used (in theory). However,
it is generally recommended that class C addresses are used (192.0.0.1 through
223.255.255.255).
There are two rules for choosing IP addresses:
• The network identifier must be the same for each address.
• The host identifier must be unique for each address.
Applying these rules to class C addresses, the first three decimal values of the IP addresses
must all be the same, while the last value is used to uniquely identify each device.
The table below shows an example of a valid class C addressing scheme.
Device
Device 1
Device 2
Device 3
NOTE: The host identifiers (41, 42, and 43 in the example above) do not need to be
sequential or in any particular order. However, it is recommended that the numbers are
grouped for simplicity.
RTSP (Pull)
4*
4*
IP Address Subnet Mask
255.255.255.0
208.132.180.41
255.255.255.0
208.132.180.42
255.255.255.0
208.132.180.43
TS/UDP TS/RTP
(Push) (Push)
1 2
1 2
SMP 300 Series • Reference Information
ES/RTP
(Push)
4*
4*
144