MeshNetworks
3 Installing the MEA Vehicle Mounted Modem
3.1 Device Administration: Configuring the VMM Devices
The VMM provides network access to one or more IP devices connected to the Ethernet port of
the VMM. In order for the VMM to provide service to the IP devices, some configuration must be
done prior to connecting the IP devices.
The VMM serves as a default gateway for the attached IP devices. Because some devices
expect the default gateway to reside on the local subnet, the address that the VMM uses for
gateway service (on the wired interface) must be configurable. Some consideration should be
used in selecting a gateway address for the VMM.
The local default gateway address is used only on the wired interface, and is only visible to the
attached IP devices. It is not advertised to the wireless network, and the network cannot access
the VMM using this gateway address. The VMM has another IP address for the wireless
interface that can be used to access the VMM from the network. Because is gateway address is
limited to the local wired interface, the same address could be used for the gateway service in
several VMM devices. The local gateway should be a part of the overall subnet chosen for your
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a network.
When selecting IP addresses, care must be taken to ensure that the selected IP address does
not conflict with any other devices or the chosen Local Gateway service address on the MEA
network.
3.1.1 Accessing the MEA Device Administration Web Pages
To modify the IP configuration for the VMM using the web interface, you must know the IP
address assigned to the wireless interface of the VMM. The IP address can be determined
from MeshManager, or from the DHCP server (once the device is configured for DHCP). The
default IP address for the VMM wireless interface is derived from the transceiver MAC address
(10.xx.yy.1, where the MAC address is 00:05:12:0A:XX:YY), similar to the default IP addresses
described in
Once the IP address is known, you can access the web page of the device. Point your web
browser to the IP address of the VMM. In the examples following, the VMM address is
172.16.1.53, and the web page would be found at
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