3: NETWORK CONFIGURATION
Iridium Pilot™ Installation Guide 27
Subnet Mask
This denes the subnet used on the vessel. The factory default is 255.255.255.0. You should only change this
default if you change the IP address of the IBSU. All network devices must use the same subnet in order to
communicate with one another.
Dynamic Host Conguration Protocol (DHCP) Server
This automatically provides unique IP addresses and appropriate conguration parameters to each network
device connected to the IBSU. In the current conguration, DHCP is disabled.
Note: While DHCP is disabled, devices connected to the IBSU will need to have their network settings manually
congured. There must only be one DHCP server on any network segment.
DHCP IP Address Minimum and Maximum
This sets the range of IP addresses for the DHCP server to use. The factory default is 192.168.0.2 to
192.168.0.254. The range species the maximum number of devices on the network. Both the maximum and
minimum value must be in the same subnet.
Domain Name System (DNS) Forwarding
DNS is used to convert network names (such as www.iridium.com) into the IP addresses needed to connect to
the device. The factory default is disabled. The IBSU acts as a switching station so that it automatically forwards
DNS requests to the appropriate DNS server.
Once you change the LAN conguration and press the ‘Update IP Conguration’ button the IBSU will reboot to
apply the conguration changes – this will drop any calls. Once the IBSU has rebooted any connected network
devices may take up to 10 minutes to automatically obtain new settings. During this switch over time the
network devices may not be able to communicate with the IBSU or/and duplicate IP address settings can occur.
If you change the LAN settings it is advisable to reboot any attached devices to avoid this issue Note: The LAN
Settings can be reset to the factory defaults using the reset switch on the BDE.