Cyclades AlterPath OnBoard, Administrator'S Manual

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Configuring Private Subnets and Virtual Networks
252 AlterPath OnBoard Administrator’s Guide
Note: The OnBoard attempts to reach a device that does not have a private
subnet assigned by attempting to contact it through the OnBoard’s default
route. Therefore, unless the OnBoard administrator defines a public subnet
and assigns it to each device, the device cannot be reached unless the device is
on the public side of the OnBoard. In almost all cases, devices are on the
private side of the OnBoard and therefore they are unreachable without a
private subnet.
When an administrative user clicks the “Add Subnet” button on the Network
→
Private Subnets Screen, the “Private Subnet configuration” dialog appears,
as shown in the following screen example.
Figure 7-16:
Network
→
Private Subnets: Add Subnet Dialog
A subnet is defined by configuring the following:
The OnBoard derives the range of addresses in the subnet from the OnBoard-
side IP address and the subnet mask. The OnBoard uses the specified
information to create a route to the subnet in the OnBoard’s routing table.
Table 7-5:
Fields on the Private Subnet Configuration Dialog
Field Definition
Private subnet name Any meaningful name chosen by the administrator.
OnBoard side IP
address Devices use this address when communicating with the
OnBoard. The OnBoard uses this address when communicating
with devices. This address must be within the private subnet’s IP
address range)
Subnet mask Used to define the range of addresses available on the subnet