Digi TX54 User Manual page 96

Interfaces
e. Configure when the WWAN's DNS servers will be used:
(config network interface my_wwan)> modem dns value
(config network interface my_wwan)>
Where value is one of:
n
n
n
The default setting is primary.
f. SIM failover is enabled by default, which means that the modem will automatically fail over
from the active SIM to the next available SIM when the active SIM fails to connect. To
disable:
(config network interface my_wwan)> modem sim_failover false
(config network interface my_wwan)>
If enabled:
i. Set the number of times that the device should attempt to connect to the active SIM
before failing over to the next available SIM:
(config network interface my_wwan)> modem sim_failover_retries num
(config network interface my_wwan)>
The default setting is 5.
ii. Configure how SIM failover will function if automatic SIM switching is unavailable:
(config network interface my_wwan)> modem sim_failover_alt value
(config network interface my_wwan)>
where value is one of:
7. The TX54 device uses a preconfigured list of Access Point Names (APNs) when attempting to
connect to a cellular carrier for the first time. After the device has successfully connected, it
will remember the correct APN. As a result, it is generally not necessary to configure APNs. See
Configure cellular modem APNs
TX54 User Guide
always: DNS will always be used for this WWAN; when multiple interfaces have the
same DNS server, the interface with the lowest metric will be used for DNS
requests.
never: Never use DNS servers for this WWAN.
primary: Only use the DNS servers provided for this WWAN when the WWAN is the
primary route.
none: The device will perform no alternative action if automatic SIM switching
n
is unavailable.
reset: The device will reset the modem if automatic SIM switching is
n
unavailable.
reboot: The device will reboot if automatic SIM switching is unavailable.
n
for further information and instructions for setting an APN.
Wide Area Networks (WANs)
96