CoreEL Add Independent Management IP port to ST2110 Modules

CoreEL have added a third management IP connection to their ST2110 module and products, so now you can access the onboard configuration web page and run NMOS control over a separate low speed network, independent and isolated from the main video switch.

The CoreEL Technologies Professional Media over IP (PMoIP) product range of modules, baseboard and end user equipment can now be controlled through a 1000/100/10Mbps using a low cost TP-Link Ethernet to USB adaptor. CoreEL have implemented this design change following customer requests for an independent control and video signal interface. Testing the new firmware at L2tek we used the following set up:

  • NMOS Registry Server can be connected to 1G Switch or to 10/25G Switch.
  • Primary and Secondary links can be connected to same switch or different switch.
  • USB-Network Adapter Interfaces of multiple devices can be connected to 1G switch, there is no tunnelling feature between 10/25G interface and USB-Ethernet interface.

CoreEL modules already have a 1Gbe connection on board, so why didn’t we use that? Well, the 1Gbe connection is used for the tunnelling feature whereby we tunnel 1Gbe through the 10/25G Ethernet ports for configuration and camera control. That’s great when you are not too concerned about mixing up the control and video planes. It gives access to the configuration page of the connected device, and any other device on the network. BUT (and it’s not really a bug but a feature of Ethernet switches) users cannot connect multiple modules to the same 1Gbe Ethernet switch, otherwise a switching loop will be created which can result in Broadcast Storms.

The RJ45 1G Interface can be used for:

  • Controlling it’s own device through Primary Link IP address.
  • Controlling other PMoIP devices through Primary/Secondary Link IP address.
  • Controlling remote Camera, which is connected to other PMoIP devices.
  • Accessing any PC connected to 25/10G Switch
  • NMOS Registry Server can be connected to RJ45 1G Interface or to 10/25G Switch.
  • Primary and Secondary links can be connected to same switch or different switch.
  • RJ45 1G Interfaces of multiple devices CAN NOT be connected to the same 1G Switch, due to tunnelling feature implementation across 10/25G Link and RJ45 1G Link.


More information regarding use cases with the third port, and how to avoid Ethernet looping issues, please refer to the following document Looping_Effect_in_PMoIP_Setup

Part of the test uses a Raspberry Pi to act as NMOS registry server and I’d recommend a very useful link to the work done by Richard Hastie of NVIDIA .Here you will find not only a NMOS registry server, but also a NMOS test node generator and the EBU NMOS test program.

Please contact us at L2tek (through our contacts page or give us a call) if you are interested in getting more information.