PCE High Availability and Disaster Recovery
Get an overview of how you can achieve high availability (HA) for the PCE and how you can handle disaster recovery (DR) if a failure occurs.
Overview of PCE High Availability (HA)
The PCE provides high availability (HA). In the event of a failure, your PCE cluster's availability and operability can be maintained with zero or minimal data loss and no or limited human intervention, based on the type of failure that occurs.
HA for the PCE depends on the type and severity of failure that occurs. For example, in less severe, non-catastrophic failure cases, such as when a node is powered off, or network connection is lost, the cluster's availability is automatically re-established without human intervention and with no or limited data loss.
Overview of PCE Disaster Recovery (DR)
In more severe disaster cases, such as when part or all of the PCE is damaged or destroyed, the PCE is designed to be able to recover with minimal data loss and a minimum amount of human intervention.
In all PCE failure cases, the VENs continue to enforce the last known policy until the PCE is recovered.