How to use the Real-Time WAN Transport

Submitted by grayson on Thu, 05/20/2021 - 13:03

In Connext DDS Professional 6.1.0 and above, a new UDP-based transport is available for communicating over a wide area network (WAN). 

The Real-Time WAN Transport is a smart transport that enables secure, scalable, and high-performance communication over WANs, including public networks. Real-Time WAN Transport uses UDP as the underlying IP transport-layer protocol to better anticipate and adapt to the challenges of diverse network conditions, device mobility, and the dynamic nature of WAN system architectures.

Real-Time WAN Transport provides the following capabilities:

  • NAT (Network Address Translator) traversal: Ability to communicate between DomainParticipants running in a Local Area Network (LAN) that is behind a NAT-enabled router, and DomainParticipants on the outside of the NAT across a WAN. This functionality is provided in combination with Cloud Discovery Service.
  • IP mobility: Support for network transitions and changes in IP addresses in any of the DomainParticipants participating in the communication.
  • Security: Secure communications between DomainParticipants using Security Plugins.

Real-Time WAN Transport does not require third-party components, such as STUN servers, or protocols like SIP to handle session establishment. Using a single API and security model, you can leverage the extensive capabilities of the Connext DDS framework and ecosystem, including tools and infrastructure services, even for real-time connectivity from edge to cloud and back in highly distributed systems that communicate across wide area networks.

To get started using the Real-Time WAN Transport, see the example on Github here.

If you need to use the Real-Time WAN Transport with Connector, you will need to set your build environment to load libraries from your Connext installation where the transport has been installed. For further details, please see Loading Connext DDS Add-On Libraries in the Connector User's Manual.

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