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Interfaces
Wide Area Networks (WANs) and Wireless Wide Area Networks
(WWANs)
A Wide Area Network (WAN) provides connectivity to the internet or a remote network. A WAN
configuration consists of the following:
A physical device, such as an Ethernet device or a cellular modem.
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Several networking parameters for the WAN, such as firewall configuration and IPv4 and IPv6
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support.
Several parameters controlling failover.
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Configure WAN/WWAN priority and default route metrics
The TX54 device is preconfigured with one Wide Area Network (WAN), named WAN1, and one or two
Wireless Wide Area Network (WWAN)s, named WWAN or WWAN1 and WWAN2. You can also create
additional WANs and WWANs.
When a WAN is initialized, the TX54 device automatically adds a default IP route for the WAN. The
priority of the WAN is based on the metric of the default route, as configured in the WAN's IPv4 and
IPv6 metric settings.
Assigning priority to WANs
By default, the TX54 device's WAN (WAN1) is configured with the lowest metric (1), and is therefor the
highest priority WAN. By default, the Wireless WANs (WWAN or WWAN1 and WWAN2) are configured
with a metric of 3, which means they have an equal priority between themselves, and a lower priority
than WAN1. You can assign priority to WANs based on the behavior you want to implement for
primary and backup WAN interfaces. For example, if you want a cellular connection to be your
primary WAN, with an Ethernet interface as backup, configure the metric of the WWAN to be lower
than the metric of the WAN.
Example: Configure cellular connection as the primary WAN, and the Ethernet
connection as backup
Required configuration items
Configured WAN and WWAN interfaces. This example uses the preconfigured WAN1 and
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WWAN/WWAN1 interfaces.
The metric for each WAN.
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TX54 User Guide
Wide Area Networks (WANs)
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