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Clicking the Add Subnet button on the Configure Subnets screen brings up the Private Subnet configuration dialog. At least one private subnet must be defined to enable devices that are connected to the OnBoard appliance’s private Ethernet ports to communicate over the Internet via the OnBoard appliance’s public IP address. Any number of private subnets may be configured.The following table defines the information that the administrative user must supply in the fields that define a subnet.
Devices use this address when communicating with the OnBoard appliance. The OnBoard appliance uses this address when communicating with devices. This address must be within the private subnet’s IP address range. The OnBoard appliance derives the range of addresses in the subnet from the OnBoard appliance-side IP address and the subnet mask.The OnBoard appliance uses the specified information to create a route to the subnet in the OnBoard appliance’s routing table.The example in Figure 6.10 shows a private subnet name of net1, an OnBoard side IP address of 192.168.0.254 and a subnet netmask of 255.255.255.0. The private subnet address derived from this configuration is 192.168.0.0.Since the broadcast address in the example is 192.168.0.255 (by convention) and the OnBoard’s address is 192.168.0.254, the administrator can assign an IP address out of the remaining available IP addresses between 192.168.0.1 and 192.168.0.253 when configuring a connected device.Multiple private subnets may be needed if IP addresses are already assigned to connected devices’ Ethernet ports and if the IP addresses are not in the same range.
2. Click the Wizard button.
3. Click the Subnets option in the left menu bar.
4. Click the Add Subnet button.
6.
8. Click OK.
9. Click Save and apply changes.
10. Click the Next button, if desired, to go to the next Wizard step.
2. Click the Wizard button.
3. Click the Subnets option in the left menu bar.
4. Click the Edit button for the entry for the private subnet you want to change.
8. Click OK.
9. Click Save and apply changes.
10. Click Next, if desired, to go to the next Wizard screen.