Creating a network interface for connecting to an LTE network

To create a network interface for connecting to an LTE network:

1. Create a network interface in one of the following ways:
   • If you want to create a network interface in a CPE template, go to the SD-WAN → CPE templates section, click the template and in the displayed settings area, select the Network settings tab.
   • If you want to create a network interface on a CPE device, go to the SD-WAN → CPE section, click the device and in the displayed settings area, select the Network settings tab.

   The table of network interfaces is displayed.

2. Click + Network interface.
3. This opens a window; in that window, in the Alias field, enter the name of the network interface for mapping the network interface to a logical WAN interface. Maximum length: 15 characters. The default setting is eth1.
4. In the Zone drop-down list, select a previously created firewall zone to which you want to add the network interface.
5. In the Protocol drop-down list, select QMI.
6. In the QMI name field, enter the path to the modem on the CPE device. Maximum length: 30 characters. For example, you can enter /dev/cdc-wdm0.
7. In the APN field, enter the APN ID of the service provider that issued the SIM card installed in the modem. Maximum length: 30 characters.
8. In the Authentication type drop-down list, select the authentication type on the network interface:
   • PAP (Password Authentication Protocol).
   • CHAP (Challenge-Handshake Authentication Protocol).
   • PAP and CHAPmeans that both types of authentication are used on the network interface.
   • Nonemeans that authentication is not used on the network interface.
9. In the Username for PAP/CHAP authentication field, enter the user name for PAP/CHAP authentication. Maximum length: 30 characters. If you do not want to use authentication, do not specify a value for this setting.
10. In the Password for PAP/CHAP authentication field, enter the password for PAP/CHAP authentication. Maximum length: 30 characters. If you do not want to use authentication, do not specify a value for this setting.
11. In the PIN code field, enter the PIN code of the SIM card installed in the modem. Maximum length: 4 digits.
12. In the Delay field, enter the time in seconds after which the network interface must begin to communicate with the modem. Maximum value: 30. This setting is used when the modem takes too long to start.
13. If necessary, specify the network mode for the network interface:
    1. Under Modes, click + Add.
    2. In the drop-down list, select one of the following values:
       • All (use all available network modes).
       • LTE.
       • UMTS.
       • GSM.
       • CDMA.
       • TD-SCDMA.

    The network mode is specified and displayed under Modes. You can specify multiple network modes; to delete a mode, click the delete icon next to it.

14. In the Connection profile field, enter the connection profile index that the network interface must use instead of the APN ID. Maximum length: 30 characters.
15. In the IP stack drop-down list, select the IP stack that you want to be used on the network interface:
    • IPv4 to use the IPv4 protocol stack on the network interface. Default value.
    • IPV6 to use the IPv6 protocol stack on the network interface.
    • Dual stack (IPv4 and IPv6) to use IPv4 and IPv6 dual stack on the network interface.
16. Clear the IPv4 over DHCP check box if you do not want to assign an IPv4 address to the network interface via DHCP. To select this check box simultaneously with the IPv6 over DHCP check box, select Dual stack (IPv4 and IPv6) (for dual stack) in the IP stack drop-down list. This check box is selected by default.
17. Select the IPv6 over DHCP check box to assign an IPv6 address to the network interface via DHCP. To select this check box simultaneously with the IPv4 over DHCP check box, select Dual stack (IPv4 and IPv6) in the IP stack drop-down list. This check box is cleared by default.
18. Clear the Autoconnect check box if you do not want the modem to automatically connect to the network. This check box is selected by default.
19. In the PLMN field, enter the PLMN ID of the service provider. The first three digits of the PLMN ID are the country code, and the next three digits are the mobile network code.
20. In the Timeout field, enter the time in seconds for the network interface to wait for the completion of the SIM card operations on the modem. Maximum value: 20. The default setting is 10.
21. In the Serial field, enter the serial port of the modem. Maximum length: 50 characters.
22. If you are creating the first network interface to be mapped to the SD-WAN interface of the WAN type, in the Route metric field, enter 100. For each subsequent network interface that will be mapped to the SD-WAN interface of the WAN type, increment this value by 1. For example, for the second network interface, enter 101.
23. Click Create.

    The network interface is created and displayed in the table.

24. In the upper part of the settings area, click Save to save the settings of the CPE template or device.