Problem

A cellular TLOC with color LTE is inactive.

Conditions

  • A Cisco IOS XE Catalyst SD-WAN device has more than one interface configured.

  • The device has a mix of interface types - GigabitEthernet and cellular.

  • The DHCP administrative distance (AD) configured for the GigabitEthernet interface or interfaces is 1. Note that 1 is the default value.

Where to configure

If you are using a configuration group to configure the device, the DHCP administrative distance is configured in the Transport VPN feature in a Transport & Management profile.

If you are using feature templates to configure the device, the DHCP administrative distance is configured in the Cisco VPN feature template.

Problem details

These conditions can cause this:

  • The GigabitEthernet interface, using DHCP, has AD=1.

  • The cellular interface, using IP Control Protocol (IPCP), has AD=254.

In this scenario, the cellular TLOC is not installed in the forwarding information base (FIB), so the cellular TLOC fails.

Solutions

Solution: Configure a default route for the cellular interface

Using a CLI add-on profile or CLI add-on template, for VPN 0, configure a default route explicitly for the cellular interface.

Example: ip route 0.0.0.0 0.0.0.0 Cellular0/1/0

Solution: Configure an administrative distance of 254 for the GigabitEthernet interface

For the GigabitEthernet interface, configure an administrative distance of 254.

  • Configuration groups method

    If you are using configuration groups to configure devices, do this:

    1. Open a Transport & Management profile.

    2. Add or edit a Transport VPN feature.

    3. In the Route section, add or edit an IPv4 static route configuration.

    4. For the GigabitEthernet interface, configure the administrative distance as 254.

  • Templates method

    If you are using templates to configure devices, do this:

    1. Add or edit the Cisco VPN feature template for the device.

    2. In the IPv4 Route section, add an IPv4 route.

    3. For the route, add a next hop.

    4. For the next hop address, enter the GigabitEthernet interface details. Example: GigagbitEthernet0/1/0

    5. For the administrative distance, configure 254.