Extron Electronics VN-QUANTUM User Guide - Manual (Page 105)

VN-QUANTUM User Guide Appendix A: Guide to IP Addressing
I455GB issue 8 Page 105
Choosing IP Addresses
If your VN Processor(s) and control PC are directly connected or connected via their own independent
network, then follow the guidelines below for choosing your IP Address(es).
However, if you intend connecting your VN Processor(s) and control PC to an existing network, you
will need to advise the network administrator and ask them to allocate suitable addresses to you.
On an independent (private) network you can (in theory) use just about any addresses you wish.
However, it is generally recommended that you use the Class C format (i.e. from 192.0.0.1 up to
223.255.255.253). In addition, some address ranges from each of the network classes have been set
aside and designated “reserved” or “private” address ranges:
Class A: 10.0.0.0 to 10.255.255.255
Class B: 172.16.0.0 to 172.31.255.255
Class C: 192.168.0.0 to 192.168.255.255
These addresses not used or routed on the Internet and are specifically reserved for use by private
networks.
Remember that there are two rules for choosing IP Addresses:
• the network identifier must be the same for each address, and
• the host identifier must be unique for each address.
Applying these rules to Class C addresses, it can be seen that the first three decimal values of your IP
Addresses 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
Device 1 208.132.180.41
Device 2 208.132.180.42
Device 3 208.132.180.43
NOTE: The host identifiers (e.g. 41, 42, and 43 in the above example) need not 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
Device 1 208.132.180.41
Device 2 192.157.180.42
Device 3 209.100.123.43
NOTE: These are invalid because the network identifier for each address is not the same, even
though each IP Address is unique.
You can use the Ping command from your computer to check that a device at a particular address is
responding correctly (see page 107).