HP-UX AAA Server A.08.02 Administrator's Guide

Server. Running multiple HP-UX AAA Servers on the same host ensures better utilization of system
resources, thus ensuring greater scalability. And running cloned HP-UX AAA Servers belonging to
a single group on multiple hosts provides high-availability of the AAA services.
For easier management of the HP-UX AAA Servers, each server is associated with a group. In the
given example, HP-UX AAA Server Manager manages three groups, called Group A, Group B,
and Group C, denoted by red, blue, and green respectively. The servers in Group A and Group
C are named S1, S2, and S3 and the servers in Group B are named S1, S2, S3 and S4.
Group A is a group with a set of three HP-UX AAA Servers S1, S2 and S3, running on the same
host, Host 1. These servers running on Host 1, utilize the system resources effectively, thus providing
a scalable solution. By employing the load balancers, if one of the HP-UX AAA Servers (for example,
S2) on Host 1 is relatively free than the other HP-UX AAA Servers on Host 1, new client requests
can be directed to HP-UX AAA Server S2 to ensure load is evenly balanced. Therefore, client
requests are processed faster to provide desired optimum performance.
Group B is a group with a set of four HP-UX AAA Servers, S1 and S2 running on Host 2, and S3
and S4 running on Host 3. HP-UX AAA Servers S1 and S3 are cloned servers providing
authentication services and S2 and S4 are cloned servers providing accounting services. If an
HP-UX AAA Server (S1/S2) crashes, the cloned server (S3/S4) can service the clients' requests,
thereby ensuring high-availability of the solution. If Host 2 crashes, the HP-UX AAA Servers (S1
and S2) are not available to service the client requests, but the cloned servers (S3 and S4) can
service the client requests, thereby ensuring high-availability of the solution.
Group C is a group with a set of three HP-UX AAA Servers, S1, S2 and S3 running on Host 2 and
Host 3. HP-UX AAA Server S1 provides authentication services and S2 provides accounting services
on Host 3, while S3 provides both the authentication and accounting services on Host 2. S1 and
S2 are the primary servers running on Host 3 addressing scalability and S3 is a hybrid of S1 and
S2 providing a backup to address high-availability.
NOTE: In the given example, only one port number is used per HP-UX AAA server. However,
multiple port numbers such as authentication, accounting, dynamic authorization ports, can be
used for each HP-UX AAA Server.
Managing Multiple HP-UX AAA Servers For Scalability and High-Availability
This section describes how to manage multiple HP-UX AAA Servers. It discusses the following topics:
• “Administering HP-UX AAA Servers Using HP-UX AAA Server Manager” (page 199)
• “Administering HP-UX AAA Servers Using HP-UX AAA Server Admin Tool (Command Line)”
(page 207)
Administering HP-UX AAA Servers Using HP-UX AAA Server Manager
This section describes how to configure servers and groups using the HP-UX AAA Server Manager.
The Default (Server Connections) group, including a server, called localhost, is present by default.
This group is compatible with the Server Connections present in releases earlier than HP-UX AAA
Server A.08.00. All Server Connections managed by the HP-UX AAA Server Manager in the earlier
versions of HP-UX AAA Server are moved to the Default (Server Connections) group during migration.
If you do not want to create new groups for scalability and high-availability, you can continue to
create HP-UX AAA Servers belonging to this group.
The section also describes how to administer the HP-UX AAA Servers using the HP-UX AAA Server
Manager. The section discusses the following topics:
• “Logging In” (page 200)
• “Adding a Group” (page 200)
• “Modifying a Group” (page 201)
• “Deleting a Group” (page 202)
Managing Multiple HP-UX AAA Servers For Scalability and High-Availability 199