Extron electronics DXP 88 HD 4K PLUS - Choosing IP Addresses; Subnet Mask

DXP HD 4K PLUS Series • Reference Information 105
Choosing IP Addresses
If the computer and the DXP are directly connected or connected via their own independent
network, follow the guidelines below for choosing the IP addresses.
However, if you intend to connect your computer and switcher to an existing network, you
need to advise the network administrator and ask the administrator to allocate suitable IP
addresses.
On an independent network, it is generally recommended that you use the Class C format
(from 192.0.0.1 to 223.255.255.254).
There are two rules for choosing IP addresses:
• Network identifier must be the same for each IP address
• Host identifier must be unique for each address.
Applying these rules to Class C addresses, the first three decimal values of your IP address
must all be the same while the last value is used to uniquely identify each device.
The following is an example of a valid Class C addressing scheme:
Device IP Address
Matrix Switcher Control Software computer 192.168.180.41
DXP HD 4K PLUS switcher 192.168.180.42
NOTE: The host identifiers (41 and 42 in the above example) do not need to be
sequential or in any particular order. However, it is recommended that you group the
numbers for simplicity.
The following is an example of an invalid Class C addressing scheme:
Device IP Address
Matrix Switcher Control Software computer 168.192.180.41
DXP HD 4K PLUS switcher 192.168.180.42
NOTE: The above addresses are invalid because the network identifier for each
address is not the same even though each IP address is unique.
You can perform a test from your computer to check that a device at a particular address is
responding correctly or to determine its address (see “Pinging for the IP Address”).
Subnet Mask
The subnet mask is another 32-bit binary number that is used to “mask” certain bits of the
IP address. This provides a method of extending the number of network options for a given
IP address. It works by allowing part of the host identifier to be used as a subnet identifier.
It is important that you set the correct value for the subnet mask. The basic values depend
on the class of IP address being used.
Class Name Subnet Mask
Class A 255.0.0.0
Class B 255.255.0.0
Class C 255.255.255.0
(See Subnetting, a Primer on page109 for more information.)