Fail-over scenarios for digital and analog endpoints during the upgrade

Last Updated : Feb 27, 2020 |
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Digital and analog endpoint fail over when a registration failure is detected

The MGCs monitor the registration of the endpoints by using the “time to live” monitoring, but health checks in the registration allows the MGC to detect a registration failure faster. After detecting the registration failure, the MGC tries to re-register the endpoint.
The MGC may detect registration failure. This failure could be because of a user action, such as call modification or call release, during the call, which might result in the call being lost.
If the user is on a call, Device Adapter and MGC maintain the media path. However:
  • If the user tries to modify the media path during an active call and if the MGC detects the registration failure, the MGC immediately attempts re-registration on behalf of the endpoint.
  • If the user tries to modify the media path during an active call and if the MGC has still not detected the registration failure, then the MGC attempts re-registration on behalf of the endpoint only after Device Adapter fails to respond to a service request made by the endpoint.
Depending on the deployment model, if the MGC cannot re-register the endpoint to the same node or cluster, the MGC tries to fail over to an alternate node or cluster.