A second A__UHD Core can be installed to provide redundancy for the processing and streaming. In this instance, the first device runs as master while the second device works as a slave. The system monitors the quality of the control connection to the two devices, and triggers an automatic takeover if certain factors, such as connection loss, occur.
To implement this option, you must activate and install a redundancy license on the second (slave) unit. The master should be installed with whatever license(s) are required in the normal manner.
If the master fails and you wish to reboot the system, then you must move the master's license dongle to the slave. Or, activate and install two sets of licenses on both devices.
Automatic Takeover
The streams to both devices are always established and all parameters are mirrored to the slave device.
If the active A__UHD Core fails or there is a control system error, then the switchover to the slave happens automatically. This ensures a seamless recovery without any interruption to operation.
Please note: there will be a short break in audio while the streams are re-configured.
Control Network Connection Failure
It is recommended to install two separate network(s) to provide a primary and secondary connection to each of the main components: the A__UHD Cores, the control systems (if external) and the control surface (MGMT ports).
This allows the system to recover from a connection failure automatically, as long as one of the Management Network paths remains valid.
Manual Takeover
The active A__UHD Core can be forced to switch to the slave device from the Central GUI as follows.
- Open the System Settings display and select the Global topic.
- Under "A__UHD Core Redundancy", select the Manual takeover option.
- A confirmation dialog box appears - select Yes to confirm (or No to abort the operation).
- If you select Yes, the system switches to the slave unit. This will result in a brief interruption to audio (as for an automatic takeover).