For additional capacity and for failover, you can cluster a group of NetIQ Access Manager Appliances and configure them to act as a single server.
You can achieve load balancing and fault tolerance by installing multiple instances of Access Manager Appliance. You can cluster any number of Identity Servers, Access Gateways, SSL VPNs, and up to three of Administration Consoles. The first three nodes of Access Manager Appliance contain the Administration Console, Identity Server, Access Gateway, and SSL VPN. Fourth installation onwards, the node will have all components except the Administration Console. We recommend that you install at least one secondary Access Manager Appliance.
Clustering of NetIQ Access Manager Appliances enables the following features:
Fault Tolerance for Configuration Store: You can install an Access Manager Appliance and configure it as a secondary Administration Console.
Automatic clustering of group of Identity Servers and group of Access Gateways: Identity Servers and Access Gateways in each Access Manager Appliance will be grouped into respective clusters.
Configuration Synchronization: You configure the cluster, and the configuration is synchronized to all members of the cluster.
User Session Sharing: Each cluster member can handle sessions held by another server in the cluster. After a session is established, the same member usually handles all requests for that session. However, if that cluster member is not available to handle a request, another member steps in and processes the request.
NOTE:This is not applicable for the Administration Console.