The System Manager Geographic Redundancy service replicates the Avaya Aura® element support for two geographically distant System Manager sites with separate subnetworks and across a WAN so that the System Manager management services can change from one site to another when one of the sites or servers fails. The System Manager Geographic Redundancy sites are set up in pairs with each site in a System Manager standalone or System Manager HA configuration. You can designate one server from the pair as the primary System Manager server and the other as the secondary System Manager server.
In normal operation also called sunny-day scenario, the primary System Manager provides all element administration and automatically replicates the administrative changes made on the primary System Manager server to the secondary System Manager server on a batch transaction basis. The secondary System Manager functions in the warm standby mode or the read-only mode and provides a subset of System Manager services, such as the System Manager Geographic Redundancy status or statistics, Inventory, and Authentication and Authorization.
In the event of catastrophic failure or split network, also called rainy-day scenario, you can activate the System Manager server that you designated as secondary to assume full management of all supported Avaya Aura® elements. The elements that support the Active-Standby mode include Avaya Aura® Session Manager and Avaya Aura® Communication Manager. Geographic Redundancy-unaware elements might require manual intervention to gain services from the secondary System Manager server that is active.
The primary and the secondary System Manager servers can be in active mode in the split network scenarios.
After deactivation of the secondary System Manager server, the system administrator selects the database of the primary or the secondary System Manager server as the master database. The System Manager feature provides tools to select the database. After the database recovery and replication, the System Manager Geographic Redundancy servers revert to the normal operation mode, Active-Standby.
