The Fault Tolerance strategy encompasses measures to ensure that the ESA infrastructure remains robust against failures and continues to operate optimally under various failure conditions. The key aspects include the following.
ESA Redundancy
Achieve network redundancy by utilizing multiple network paths to prevent single points of failure in the network infrastructure for ESA, that is, having GTM/LTM architecture.
Load Balancing
Deploying load balancers not only aids in disaster recovery but also ensures balanced distribution of traffic specially for forwarding logs to prevent any single ESA from becoming a bottleneck.
Regular Testing
Periodically test failover mechanisms to ensure that they work correctly when needed.
Conduct regular DR drills to verify that the transition from primary to DR site occurs smoothly without service disruption.
Proactive Monitoring
Continuously monitor ESA performance and health metrics to detect issues early and take corrective actions before they escalate into major problems. This can be done by configuring alerts to monitor system monitoring metrics. For more information, refer to Alerting.