
• The network modules
You define the cluster topology by entering information about each component into
Note
The SP Switch network module can support multiple clusters; therefore, its settings should remain at their default values to avoid affecting HACMP event scripts. If you must change these settings, see the chapter on changing the cluster topology in the HACMP for AIX, Version 4.3: Administration Guide,
4.2.1 Defining the Cluster
The cluster ID and name identifies a cluster in an HACMP environment. The cluster ID and name must be unique for each cluster defined.
Cluster IDs have to be a positive integer in the range from 1 through 99999, and the cluster name is a text string of up to 31 alphanumeric characters, including underscores. It doesn’t necessarily need to match the hostname.
The HACMP software uses this information to create the cluster entries for the ODM.
4.2.2 Defining Nodes
After defining the cluster name and ID, cluster nodes have to be defined. As above, this is usually done through smit hacmp. Each of the cluster nodes needs a unique name, so the cluster manager can address them.
Again, a node name is a text string of up to 31 alphanumeric characters that can contain underscores.
You can add more than one node at a time by separating them with whitespace characters.
HACMP Installation and Cluster Definition 101