Avaya Aura® provides System Manager Geographic Redundancy, a resiliency feature that handles scenarios where the primary System Manager server fails or the data network partially loses connectivity. In such scenarios, the system manages and administers products such as Avaya Aura® Session Manager and Avaya Aura® Communication Manager across the customer enterprise using the secondary System Manager server. For customers who need highly fault-tolerant deployments, System Manager supports System Manager Geographic Redundancy deployments that can provide the Active-Standby mode of resiliency.
The Geographic Redundancy feature of System Manager consists of two System Manager servers located in geographically remote locations. The Geographic Redundancy feature ensures that the enterprise communications remain unaffected during the failure of a single System Manager server or during network failures.
The Geographic Redundancy feature provides the following replication mechanisms to ensure data synchronization between the primary System Manager server and the secondary System Manager server:
Database replication
File replication
LDAP replication
In a system consisting of geographic redundant System Manager servers, the primary components include:
Two System Manager servers located in geographically diverse locations. One System Manager server is designated as the primary System Manager. On a sunny day, the primary System Manager manages all elements in the system. The other System Manager server is designated as the secondary System Manager. The secondary System Manager remains in the standby mode. You can administer the secondary server in the active mode if the primary System Manager fails or loses connectivity with the elements in the system.
One or more elements that can include Session Manager or Branch Session Manager and other Avaya products.
Important:
In an environment of geographic redundant System Manager instances, both the primary System Manager server and the secondary System Manager server must reach each other using FQDN. FQDN must be reachable and resolvable through /etc/hosts or DNS.
Before configuring a Session Manager in a geographic redundant environment, the following must be true:
Both the primary and the secondary System Manager can resolve the Session Manager FQDN through /etc/hosts.
The DNS server contains the IP address or the FQDN entry of all the Session Manager instances that are configured with System Manager. This configuration ensures that both the forward and the reverse lookups of Session Manager work from both the primary and the secondary System Manager servers.
