Citrix SD-WAN

Configure external USB LTE modem

You can connect an external 3G/4G USB modem on certain Citrix SD-WAN appliances. The appliances use the 3G/4G network along with other connections to form a virtual network that aggregates bandwidth and provides resiliency. If there is a connectivity failure on the other interfaces, traffic is automatically redirected through the USB LTE modem. The following appliances support an external USB modem:

  • Citrix SD-WAN 210 SE
  • Citrix SD-WAN 210 SE LTE
  • Citrix SD-WAN 110 SE
  • Citrix SD-WAN 110 LTE Wi-Fi SE

The Citrix SD-WAN 210 SE LTE and Citrix SD-WAN 110 LTE Wi-Fi SE appliances have a built-in LTE modem. Active dual LTE is supported on these appliances.

Connecting the USB modem

Enable and test the USB modem according to the guidelines provided by your wireless carrier. Ensure that you can use the USB modem to connect to the Internet from your Windows/Linux machine. Plug in the USB modem into the Citrix SD-WAN appliance.


  • The Citrix SD-WAN appliances support only one USB LTE dongle at a time. If more than one USB dongle is plugged in, unplug all the dongles and plug in only one dongle.
  • The Citrix SD-WAN appliances do not support user name and password for USB modems. Ensure that user name and password feature is disabled on the modem during setup.

To view the external modem details, in the appliance UI navigate to Configuration > Appliance Settings > Network Adapters > Mobile Broadband. Select External Modem as the modem type.

Status information


  • The SIM PIN and other LTE modem configurations are currently not supported.
  • The LTE USB dongle model number is not displayed in Status Info section.

You can remotely view and manage all the LTE sites in your network using Citrix SD-WAN Center. For more information see, Remote LTE site management.

Configure the external USB modem

To configure an external USB modem, in the Configuration Editor navigate to Sites, select a site, and click Interface Groups. The external USB modem interface LTE-E1 is available to be configured. For more information on configuring a branch for LTE, see Configure branch for LTE.

LTE-E1 interface

Zero-touch deployment over LTE

Pre-requisites for enabling zero-touch deployment service over USB LTE modem:

  • Insert the USB modem in the Citrix SD-WAN appliance. For more information, see Connecting the USB modem.
  • Ensure that the SIM card on the USB modem has an activated data plan.
  • Ensure that the management/data port is not connected. If the management/data port is connected, disconnect it.
  • Ensure the appliance configuration has internet service defined for the LTE interface.

When the appliance is powered on, the zero-touch deployment service uses the LTE-E1 port to obtain the latest SD-WAN software and SD-WAN configuration.

Use the SD-WAN Center GUI to deploy and configure the appliance for the zero-touch deployment service. For more information, see Zero Touch Deployment. For information about zero-touch deployment through SD-WAN Orchestrator see, Zero Touch Deployment.

Supported USB modems

The following modems are compatible with Citrix SD-WAN appliances.


Citrix does not control the wireless carrier firmware updates. Therefore compatibility of new modem firmware to Citrix SD-WAN software is not guaranteed. Modem firmware update is controlled by the customer. Citrix recommends testing a firmware update on a single site before pushing it across the entire network.

Region Wireless Carrier/ Manufacturer USB Modem Citrix SD-WAN 210 SE/LTE Citrix SD-WAN 110 SE/LTE-WiFi Interfaces
USA Verizon Global Modem USB730L Yes Yes 4G only
  AT&T AT&T Global Modem USB800 Yes Yes 4G only
Non-USA Huawei Huawei E3372h-510 Yes Yes 4G only

Configure external USB LTE modem