ALEOS User Guide
Ethernet
This section governs Ethernet port connections and the Public/Private mode of all ports. Changing settings in this area requires a reboot of the AirLink device after applying any change.
Field
Host Public Mode
Device IP
Starting IP
Figure 5-1: ACEmanager: LAN/WiFi > Ethernet > General
Description
Sets the Host Interface that uses the Public IP address granted by the cellular network or if all should use private IP addresses. All host interfaces which are not using the Public IP address will use private IP addresses.
0 = Ethernet Uses Public IP
1 = All Hosts Use Private IPs (default)
2 = USB Uses Public IP
3 = RS232 Uses Public IP
4 = First Host gets Public IP — This implies whichever host you connect to first (e.g.,
Ethernet) will get Public IP and the others will get their respective Private IPs.
Note: The connected computer receives DHCP address from ALEOS, and it also has the default router set up to the device IP.
The Ethernet IP address of the AirLink device. By default this is set to 192.168.13.31.
Ethernet DHCP pool starting IP address.
Note: If you have only one computer or device connected directly to the Ethernet port, this is the IP address it will be assigned.
54 4112515
LAN/WiFi Configuration
Field
Ending IP
DHCP network mask
DHCP Server Mode
Description
The ending IP for the Ethernet Interface.
The subnet mask indicates the range of host IP addresses that can be reached directly.
Changing this will limit or expand the number of clients that can connect to the AirLink device. The default is 255.255.255.0 and means that 254 clients can connect to the AirLink device. Using 192.168.13. as the first three octets of their IP address if the device IP is
192.168.13.31.
Options: Enabled or Disabled. By default, the Ethernet DHCP server is enabled. Disabling the DHCP server will require all connected clients to have static IP addressing.
Note: If the modem (in DHCP mode) attempts unsuccessfully to assign an IP address to a hardware device, the modem resets (on the assumption that there is a hardware/system problem.
DHCP Lease time
(Seconds)
Startup Delay
(seconds)
Link Setting
Configurable DHCP lease time. Default is 14400 (4 hours).
Turns off (in seconds) the Ethernet port at boot time. Maximum value is 300 seconds.
Link Radio Coverage to Interface
Radio Link Delay
(Seconds)
Interface Disabled
Duration
Configures the link Ethernet setting. Options:
•
Auto 100/10 (default)
•
Auto 10MB only
•
100 Mb Full Duplex
•
100 Mb Half Duplex
•
10 Mb Full Duplex
•
10 Mb Half Duplex
This will disable the specified port when there is no cellular coverage. Options: Disabled
(default), Ethernet, and USB.
The delay in seconds before the radio link goes down.
Sets the time (in seconds) that the LAN port is disabled. Use this feature to temporarily disable the LAN port when the cellular connection is down for minor network service changes. Options:
•
5
•
10
•
15
•
20
•
25
•
30
•
Interface Disabled when Radio Disabled
For the last option, the LAN port is disabled for the entire time the cellular connection is down.
Rev. 6 May.13
55
ALEOS User Guide
Field
Turn Off NAT
Host Routing Mask
Description
When enabled, ALEOS routes packets without performing NAT on them. Options: Disabled
(default) and Enabled.
This mask is needed for a LAN host to route to a remote location across the cellular network.
Default: 0.0.0.0
Tip:
If you are using Private Mode for all hosts (*HOSTPRIVMODE=1), you need to make sure that the device IP, Starting IP, and Ending IP are on the same subnet defined by the
DHCP network mask. If the subnet mask is 255.255.255.0, it is safe to use 192.168.x.y for each as long as the x is the same number (0 in the example screen shot above) and the y is different (1 and 2 in the example) and between 0 and 254.
Internal DHCP Server
DHCP (Dynamic Host Configuration Protocol) has become a primary component of today’s network environments. DHCP allows one server to automatically and dynamically allocate network IP addresses and other network related settings
(i.e., subnet masks, routers, etc.) to each computer or device without the need to set up each specifically or keep track of what addresses have already been used.
In a default configuration, the AirLink device acts as a DHCP host to any device connected to its ports, providing that device with an IP address which can be used to communicate on the Internet. In Public Mode, that will be the IP address assigned by the cellular network. In Private Mode, that will be the IP addresses defined in the LAN pages.
Address Assignment in Public Mode
1.
When the AirLink device registers on the cellular network, it is assigned an IP address from the carrier, e.g., 10.1.2.0.
2.
Acting as a DHCP server, with Ethernet, uses Public IP when the AirLink device receives a DHCP request from an Ethernet device connected to its ports, it hands off the assigned address to the device and sets up the default gateway address as 10.1.2.1. If the fourth octet is already a 1, it assigns
10.1.2.2 as the router address.
Note: The primary gateway to the cellular network for any connected device is enabled by default.
3.
The AirLink device also sends a /24 netmask (255.255.255.0 by default) and sets up a static route which maps 192.168.13.31 (or the address configured with *HOSTPEERIP if it is changed) to 10.1.2.1 (or 10.1.2.2 if that was what the gateway address was given as).
56 4112515
