User guide

LAN/Wi-Fi Configuration
Rev 1 Oct.13 101
Host Interface Watchdog
The Host Interface Watchdog provides a way for you to ensure that the LAN
connection is alive. You can use this feature to monitor:
• A host connected to the LAN via an Ethernet or USB connection
• A host computer associated with a GX Series device that has a Wi-Fi X-Card
installed, provided the Wi-Fi mode is set to “Access Point” or “Both”
(See Wi-Fi on page 85.)
When the Host Interface Watchdog is enabled, ALEOS sends a ping to the
connected host at configured intervals. You can disable Force Keepalive to only
send a ping when there is no traffic on the LAN interface. (See Force Keepalive
on page 102.)
If there is no response to the ping, the LAN interface is reset.
Note: The network interface is automatically determined from the IP address and the LAN
configuration. If you have multiple interfaces bridged (see Bridge WiFi to Ethernet on
page 72) all interfaces in the bridge and the bridge itself are reset.
After the interface comes back up, ALEOS sends another ping to the connected
host. If there is still no response to this ping, the AirLink device reboots. After a
reboot caused by the LAN Interface Watchdog, ALEOS waits an hour before
attempting pings to prevent repeated frequent reboots.
Note: DUN (PPP) is not supported. If the IP address for the host is on a DUN network, the
feature is disabled.
Note: The feature is not disabled when the interface uses Public Mode, but it cannot
monitor the host interface unless the cellular network provides a static IP.
Group ID Enter the VRRP Group ID. VRRP routers in the master and slave have the same Group ID.
Priority VRRP decides whether the device is the master or slave. A greater value of priority
indicates that the device is the master.
Virtual IP If a device is configured with VRRP, the host connected to the device displays the Virtual
ID. Virtual IP becomes the VRRP router’s Device IP.
Mode Indicates whether the device is MASTER or BACKUP (default). The Priority number
determines the master or backup status
Interval VRRP advertised interval; Default: 1 second
Field Description