Overview
Explains how single-node VM HA uses the built-in redundancy features in Azure to automatically recover instances and ensure minimal downtime during critical operations.
Single-node VM HA within an Azure availability zone (AZ) is enabled by leveraging the built-in redundancy features in Azure.
If a Catalyst Center VM instance crashes, Azure automatically brings up another instance with the same IP address in the same availability zone. This ensures minimal downtime and uninterrupted connectivity, reducing disruptions during critical network operations.
The experience and recovery time objective (RTO) are similar to the power outage scenario in a traditional bare-metal Catalyst Center appliance. Azure offers Zone Redundant VM (ZRS) and Availability Sets to further enhance resilience for the Catalyst Center deployment.