How to Load Balance 7 x LTE Cellular WANs using a HD4



  • Picture a coach full of some of the world’s finest developers, programmers, hackers and technologists used as transportation between the company car park and corporate headquarters. Or perhaps a temporary office deployed rapidly for disaster recovery or whilst waiting for fixed line connectivity to be installed.


  • As much bandwidth as possible to share between bandwidth hungry users and their applications.

  • The ability to use multiple cellular carriers, dependant on coverage (particularly if installed in a moving vehicle) and bandwidth allowance.

  • Intelligent load balancing across all available connections and automatic WAN health/availability detection.

  • In the case of a rapid site deployment - complete wireless network coverage of the building.

Solution Design:

  • A HD4 is installed as the local internet gateway. It has 4 active LTE cellular internet connections to the internet built in, and supports dual SIMs per connection (in an Active/Passive configuration for coverage or bandwidth allowance purposes).

  • The HD4 has two BR1 LTE routers connected on its wired WAN ports. These also have an active cellular internet connection (with the same dual sim support as above).

  • The HD4 also has a USB LTE cellular Dongle attached to provide another internet connection.

  • Connected to the LAN of the HD4 are up to 10 Peplink Wi-Fi access points. 8 APs can be directly connected to the HD4 using the 8 physical LAN ports, any more are connected using an additional switch (not shown above).

  • The HD4 acts as a AP Controller for the attached APs, providing centralised Wi-Fi configuration, firmware and security management.

Future Expansion:

  • The HD4 supports up to 8 SIM cards (with 4 actively used at any one time), the BR1s support two SIM cards each (with one actively used by each BR1). The additional SIMs can be added to take advantage of cellular data promotions, or to provide the highest number

Additional Options / Considerations

  • A Captive Portal can be deployed on the HD4 to allocate a bandwidth allowance per connected client to control bandwidth consumption

  • External DNS providers (such as OpenDNS) can be used to restrict internet access destinations, blocking video streaming sites, OS update services and other high bandwidth activities.

  • QoS can be applied to prioritise key applications (such as VoIP)

  • SpeedFusion VPN and WAN Smoothing might be configured to provide a secure, high quality unbreakable VPN connection to corporate applications and resources improving staff productivity.

  • Using a SpeedFusion VPN connection to the vehicle, wall boards and bulkhead mounted displays can show the vehicle location (using the HD4’s inbuilt GPS) and other important corporate announcements pushed to the vehicle displays from a central corporate server.

Devices Deployed: MAX HD4, BR1, AP One Series