Troubleshooting: "Impossible to establish video session with the server" errors

If you receive an Error: Impossible to establish video session with the server message, you can try to determine the cause.

To diagnose an Impossible to establish video session with the server error:

1. Make sure your server is running.
2. Make sure the Archiver role is online:
   1. In the Config Tool Video task, select the Archiver.
   2. At the bottom of the Video task, click Maintenance > Diagnose ().
   3. Fix any issues that are found.
3. If you are trying to view a federated camera, confirm that the Security Center Federation™ role or the Omnicast™ Federation™ role is online:
   1. In the Config Tool System task, click the Roles view.
   2. Select the Federation™ role and click Maintenance > Diagnose ().
   3. Fix any issues that are found.
4. If you are trying to view a federated camera, confirm that the server for the federated Security Center system is online.
5. It might be a Media Router connection problem. Make sure the Media Router role is online:
   1. In the Config Tool System task, click the Roles view.
   2. Select the Media Router role and click Maintenance > Diagnose ().
   3. Fix any issues that are found.
6. Restart the Media Router role:
   1. In the Config Tool System task, click the Roles view.
   2. Select the Media Router role and click Maintenance > Deactivate role ().
   3. In the confirmation dialog box that opens, click Continue.
      The Media Router turns red.
   4. At the bottom of the System task, click Maintenance > Activate role ().
7. Make sure the unit is online.
   If the unit is red in the Roles and units view, then troubleshoot why the video unit is offline.