|Settings / High Availability|
Vocera Platform provides a high availability (HA) feature for automatic fail over in a cluster.
Unlike other complex systems that follow an active-active HA model to distribute the load between multiple servers, the Vocera Platform follows an active-passive model. Which means, the entire workload is directed to one single server (with a valid IP address) and cannot be shared across multiple servers.
The following two network arrangement types can be configured:
A) Layer 2 Adjacent Deployment: All nodes in the cluster are all located within the same IP subnet; i.e., the primary and all standby servers are Ethernet Layer 2 Adjacent to each other.
B) Third-Party ADC Deployment: One or more nodes in the cluster are not in the same subnet as the others; i.e., at least one node is required to traverse through a network router in order to connect to the other nodes in the cluster.