IP Addresses
9
Class B Networks and Addresses
Class B networks use a subnet mask of 255.255.0.0. This subnet mask indicates the first and
second octet in each IP address on the network must be the same. This allows network devices
to communicate on the LAN.
If your PC is on a class B network (meaning it’s using a subnet mask of 255.255.0.0), the first and
second octets of your PC’s IP address and the first and second octet of the IP address you are
assigning to your Lantronix device must be the same numbers.
Class B Example
PC running DeviceInstaller is configured with the IP and subnet mask below:
172.16.224.55 – IP Address
255.255.0.0 – Subnet Mask
To assign an IP address to a Lantronix device successfully, the IP assigned must be:
172.16.xxx.xxx
where the x’s are an available IP address on the network.
Class C Networks and Addresses
Class C networks use a subnet mask of 255.255.255.0. This subnet mask indicates the first,
second and third octet in each IP address on the network must be the same. This allows network
devices to communicate on the LAN.
If your PC is on a class C network (meaning it is using a subnet mask of 255.255.255.0), the first,
second and third octets of your PC’s IP address and the first, second, and third octets of the IP
address you are assigning to your Lantronix device must be the same numbers.
Class C Example
A PC running DeviceInstaller is configured with the IP and subnet mask below:
192.168.12.155 – IP Address
255.255.255.0 – Subnet Mask
To assign an IP address to a Lantronix device successfully, the IP assigned must be:
192.168.12.xxx
where the x’s are an available IP address on the network.
Complex Subnet Masks
Your PC is configured with a complex subnet mask if it is configured for a subnet mask other than
three listed below:
255.0.0.0
255.255.0.0
255.255.255.0
In this case, we recommend you download a freeware TCP/IP subnet calculator. To locate a
freeware subnet calculator, go to www.google.com
and search for freeware subnet calculator.
The subnet calculator will help ensure you assign a correct IP address to your Lantronix device.
Auto IP Addresses
If DeviceInstaller reported an Auto IP address issue, your PC is configured to obtain an IP
address automatically from a server on the network. If Windows does not obtain an IP address, it
defaults to an Auto-Configuration IP Address. DeviceInstaller is not able to assign an IP address
to your Lantronix device if your PC is using an Auto-Configuration IP address.
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