Analog and digital endpoint fail-over process in an N+1 and a geo-redundant model

Last Updated : Feb 03, 2020 |
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  1. The following are the two scenarios in which the MGC attempts the fail over on behalf of a digital or analog endpoint:
    ADDITIONAL INFORMATION:
    • When the MGC detects the endpoint registration failure, the MGC attempts the fail over on behalf of the endpoint.
    • A loss of service can occur during call-related signaling. For example, during an active call, the user performs an operation that modifies the media path. In this scenario, fail over is triggered by the following events:
      • If the MGC detects the endpoint registration failure, the MGC tries to re-register the endpoint.
      • If the MGC does not detect the registration failure, MGC attempts the endpoint re-registration after Device Adapter does not respond to the service request by the endpoint.
  2. The following are the fail over processes:
    ADDITIONAL INFORMATION:
    • In case of an N+1 model:
      • If the N+1 cluster has enough capacity, the load balancer passes the endpoint registration request to the node that has the capacity to accept this registration. The registration succeeds.
      • If no capacity is available on the N+1 cluster and if an alternate geo-redundant cluster is not configured, the MGC waits for the configured time interval and reattempts the endpoint registration.
    • In case of a geo-redundant model:
      • If the load balancer does not find the required capacity on the primary server, it passes the registration request to the secondary server.
      • If the secondary server has the required capacity, it accepts the registration request.