Configure WAN/WWAN priority and default route metrics

The EX15 device is preconfigured with one Wide Area Network (WAN), named WAN, and one Wireless Wide Area Network (WWAN), named Modem. You can also create additional WANs and WWANs.

When a WAN is initialized, the EX15 device automatically adds a Setup 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 EX15 device's WAN (WAN) is configured with the lowest metric (1), and is therefor the highest priority WAN. By default, the Wireless WAN (Modem) is configured with a metric of 3, which means it has a lower priority than WAN. 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


  1. Log into Digi Remote Manager, or log into the local Web UI as a user with full Admin access rights.
  2. Access the device configuration:

    1. Locate your device as described in Use Digi Remote Manager to view and manage your device.
    2. Click the Device ID.
    3. Click Settings.
    4. Click to expand Config.

    1. On the menu, click System. Under Configuration, click Device Configuration.

      The Configuration window is displayed.

  3. Set the metrics for Modem:
    1. Click Network > Interfaces > Modem > IPv4.
    2. For Metric, type 1.
    3. Click IPv6.
    4. For Metric, type 1.

  4. Set the metrics for WAN:
    1. Click Network > Interfaces > WAN > IPv4.
    2. For Metric, type 2.
    3. Click IPv6.
    4. For Metric, type 2.

  5. Click Apply to save the configuration and apply the change.

The EX15 device is now configured to use the cellular modem WWAN, Modem, as its highest priority WAN, and its Ethernet WAN, WAN, as its secondary WAN.

 

  1. Select the device in Remote Manager and click Actions > Open Console, or log into the EX15 local command line as a user with full Admin access rights.

    Depending on your device configuration, you may be presented with an Access selection menu. Type admin to access the Admin CLI.

  2. At the command line, type config to enter configuration mode:

    > config
(config)>

  3. Set the metrics for Modem:

    1. Set the IPv4 metric for Modem to 1. For example:

      (config)> network interface modem ipv4 metric 1
(config)>

    2. Set the IPv6 metric for Modem to 1:

      (config)> network interface modem ipv6 metric 1
(config)>
  4. Set the metrics for WAN:

    1. Set the IPv4 metric for WAN to 2:

      (config)> network interface wan ipv4 metric 2
(config)>

    2. Set the IPv6 metric for WAN to 1:

      (config)> network interface wan ipv6 metric 2
(config)>
  5. Save the configuration and apply the change.
    (config)> save
Configuration saved.
>
  6. Type exit to exit the Admin CLI.

    Depending on your device configuration, you may be presented with an Access selection menu. Type quit to disconnect from the device.

The EX15 device is now configured to use the cellular modem WWAN, Modem, as its highest priority WAN, and its Ethernet WAN, WAN, as its secondary WAN.