AirborneM2M™ User Guide
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CONFIGURING ETHERNET ADAPTER
ABDx-ER-DP5xx/IN5xxx devices are shipped preconfigured for use as an Ethernet adapter. All that is
required is to configure the WLAN parameters and security protocols. However, the following section will
cover the full configuration of an Ethernet Device to aid installation and deployment of the units.
The Airborne Ethernet Adapter (-ER-) is a fully functional NAT Level 3 router, supporting a public IP
address for the WLAN interface and a private network for the attached devices on the Ethernet interface.
When configured as a Bridge Adapter, it disables routing and bridges all packets between the Ethernet and
wireless interfaces.
ROUTER FUNCTIONALITY
Network Address Translation (NAT) is the process of modifying network address information in datagram
packet headers while in transit across a traffic routing device for the purpose of remapping a given address
space into another. In the case of a NAT Level 3 device, the modification of the packet headers provides for
a translation between a single public IP address (that of the WLAN interface) and the IP address of the
devices on the private network (Ethernet interface).
The Airborne Adapter WLAN interface is considered the public address and will be the point of contact on
the target network (see Figure 19). This interface supports all the wireless and network authentication
requirements including support for WPA2-Enterpise. It can acquire an IP address through both DHCP or
user configured static IP. Configuration, association and authentication are handled entirely by the Airborne
Bridge and require no interaction from the wired host on the private network.
Figure 19 - Ethernet Bridge Functionality
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