HP-UX SNAplus2 R7 Administration Guide

Appendix DUsing SNAplus2 in a High Availability Environment
Figure D–6 SNAplus2 environment with ServiceGuard
Client Client Client Client
3xxx
Communications
Controller
IBM
Host
LAN
S800
Server
S800
Server
Standby client/server
network links
Active client/server
network links
Backup serverPrimary server
Dual SNA
network DLCs
Some of the reasons that ServiceGuard works well with SNAplus2 in a high availability environment are as follows:
1. ServiceGuard is designed for general software resiliency. This means that ServiceGuard packages can easily be
built for SNAplus2.
2. The automatic recovery capabilities of ServiceGuard complement the built-in high availability features of
SNAplus2.
3. SNAplus2 can take advantage of the standard monitoring and management tools provided by ServiceGuard
which makes detecting problems and reacting to those problems a much simpler and quicker process.
D.3.1 Creating the HA SNAplus2 Package
In order to configure SNAplus2 for high availability, you must complete several steps.
1. Install and configure your ServiceGuard cluster
2. Install and configure other high availability products
3. Identify your critical SNAplus2 connectivity (see the next section for details)
4. Install SNAplus2 on the primary server and all backup servers
5. Create and configure your SNAplus2 package
Follow the ServiceGuard product documentation to install and configure disk hardware, volume groups, logical
volumes, and file systems for high availability. In addition, ServiceGuard documentation explains how to set up
your LAN for high availability.
D.3.2 Identifying Critical SNAplus2 Connectivity
Before attempting to create your SNAplus2 package, define the paths through your network that provide SNA
connectivity for the users of your SNAplus2 software. Provide at least two paths per application that you wish to
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