If you have a system administrator it is best to call them first as they may have setup some form of security on the network to protect your computers.
This security may be blocking attempts to talk with your devices.
If you do not have a system administrator it may be one of the following issues.
You have the incorrect subnet entered.
We have pre populated the field with the most common subnet in use in networks today however this may not be correct for your setup.
Please see the following documentation on how to find your subnet.
Your device is not connected to the network.
If your device is not connected to the network then it will be unreachable. Please make sure that it has been plugged into an Live Ethernet connection.
If your unsure if the connection is live unplug the connection from your device and plug it into a laptop. If the laptop connects to the network then the connection is live.
There is no DHCP server running on your network.
In some extreme cases there may be no DHCP server running on your network. The only way to know for certain if this is the case is to contact your system administrator. If there is no DHCP server running and Static IP addresses are required please unplug the device from the network and take it to another network with DHCP running once you have setup a Static IP address you will be able to connect your device to the network. However if you have a system administrator it is recommended that you talk to them to get it setup.