How Failover and Failback Work in Scheduling Network Data

Data flows over the highest available priority circuit. If all network groups have the same priority, data travels over all networks simultaneously. If all circuits at the current priority fail, data is sent over the next lower priority circuit. This process is called failover. When failover occurs, the failed connections are retried periodically.

When higher priority network connections are reestablished, failback occurs and no further data is scheduled for the lower priority connection. The lower priority connection is disconnected in an orderly fashion.

If attempts to connect to all network addresses have been made and have failed, new attempts to connect are made the next time application or system data needs to be sent between machines.