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      Software-Defined Network Flow Controller

      The SEL-5056 Flow Controller is enterprise software that comes either Microsoft Windows Server-based or as an embedded application on the SEL Blueframe platform. It is designed to optimize software-defined networking (SDN) configuration and management for critical infrastructure by allowing IEC 61850 and SEL RTAC format files to be read and implemented as network configuration. The SEL-5056 is designed to work collectively with SEL SDN switches to provide a complete traffic-engineering solution for Ethernet-based LANs. Traffic engineering with the SEL-5056 Flow Controller enables flexible configuration of each communications flow path and the ability to proactively engineer fault-tolerant networks, resulting in greater performance, improved reliability, and more deterministic packet delivery.


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      Create Stronger Network Security—Control exactly what is allowed on your network with deny-by-default architecture. Provision circuits using network access control fields in Layer 1 through Layer 4 of the packet, giving you context-aware control of what conversations are allowed between any devices. SDN makes systems more cyber-secure by eliminating attack-prone networking features, like MAC tables, the Rapid Spanning Tree Protocol (RSTP), and cast types.

      Simplify Network Engineering—Automate network engineering tasks by importing existing IEC 61850 or RTAC communication configuration files into the SEL-5056 Flow Controller for streamlined network settings. This feature saves time and resources and greatly decreases the chance of input errors or misalignment between relay settings and network communication settings.

      Improve Failover Performance—Proactively traffic-engineer your network, bringing more precision and predictability to critical infrastructure networks and improving failover times to less than 100 μs to support even the most demanding real-time control signals.

      Streamline NERC CIP Data Collection—Use the SEL-5056 Flow Controller with SEL Flow Auditor software to automate reporting of NERC CIP-007-6 R1.1—Systems Security Management, Ports, and Services.

      Reduce Downtime for Configuration—Configure the SEL-5056 Flow Controller in the field with all IEDs connected or configure it offline in a lab. Offline configuration provides flexibility and can reduce the downtime required for field installations.

      Automate Configuration—Use Learn & Lock functionality to automate commissioning and device discovery and create circuit provisioning. Learn & Lock enables supervised automation of network flow provisioning.

      Manage Network Scalability and Change Management—Manage all network changes without affecting existing services and applications. All network additions and changes can be configured centrally and pushed out to configure the network of SEL OT SDN Ethernet switches.

      Programmatically Test and Validate Your Network—Reduce deployment timelines and eliminate guess work in testing scope by knowing exactly what communication circuits your network is configured to support and that all other conversations will be dropped with deny-by-default network access control. This results in a defined test scope and predictable and consistent network validation. You have confidence your network will perform exactly how you engineered it for as long as it is in service.


      Secure Configuration—Provide situational awareness and strong cybersecurity through user-based access controls, encrypted communications, and detailed audit logging.

      Accurate, Automated Network Engineering—Import existing communication files for streamlined configuration settings.

      X.509 Certificate—Support secure, mutually authenticated communications between the switch and the flow controller.

      Syslog—Enable log management for centralized automated collection of network events through UDP or encrypted TCP Syslog.

      Change Management—Centrally manage your LAN as a single asset. Minimize disruptions when making network changes or when the system is scaled out.

      Holistic Network Visibility—View and manage your SDN switches as a single asset with near-real-time situational awareness.

      Flexible Configuration—Configure network flows with or without network connections to hosts.

      Simplified Configuration—Automate the configuration of network flows with Learn & Lock.

      Low-Latency Flow Setup—Establish new flows rapidly with low-latency flow setup times.

      Interoperability—Work with an OpenFlow 1.3-compliant configuration interface.

      OS Support—Install the flow controller as an application on SEL Blueframe or as a service on Microsoft Windows Server 2016.

      Application Support—Interface with applications such as the SEL Flow Auditor.


      Engineer a better network. It starts with SDN.

      Video Playlists

      SDN Commissioning support videos

      • SEL-5056 Using the Learn & Lock Feature
      • Commission and User Creation with the SEL-5056 Flow Controller
      • Adopt SEL-2740S Using the SEL-5056 Flow Controller
      • Adopt Hosts using the SEL-5056 Flow Controller

      Videos in this series:

      • SEL-5056 SDN Quick Start
      • SEL-5056 Logical Connections Part 1- CSTs and Logical Connection Definitions
      • SEL-5056 Logical Connections Part 2- Creating CSTs
      • SEL-5056 Logical Connections Part 3- Creating Unicast Logical Connections
      • SEL-5056 Logical Connections Part 4- Creating Multicast Logical Connections
      • Enabling SEL Relay Failover Mode with the SEL-5056 Flow Controller
      • SEL-5056: Switch Replacement Before Onsite Deployment
      • SEL-5056: Switch Replacement After Onsite Deployment
      • SEL-5056: Host Replacement in Same Location
      • SEL-5056: Host Replacement in Different Location

      Videos in this series:

      • Backing Up and Restoring SEL-5056 Databases

      The Firmware IDs for older versions of the firmware can typically be found in Appendix A of the instruction manual.

      The SEL-5056 does not require a software license.

      5056 - Software Tab

      Supporting Software

      SEL-5057 SDN Application Suite

      SEL-5057 SDN Application Suite integrates with the SEL-5056 Software-Defined Network Flow Controller to add capabilities to the SEL operational technology (OT) software-defined networking (SDN) solution, including streamlining data collection for NERC CIP compliance.

      Learn more and download on the SEL-5057 software page.

      SEL Compass

      Compass provides simple and convenient tools for managing SEL digital content. Users can keep software applications and relay configuration drivers up to date without manually browsing product webpages as well as download new product updates and literature.

      Learn more and download on the Compass software page.