IBM SG24-5131-00 User Manual

IBM Certification Study Guide  AIX HACMP

Adding or Changing a Node Name after the Initial Configuration
If you want to add or change a node name after the initial configuration, use 
the Change/Show Cluster Node Name screen. See the chapter on changing 
the cluster topology of the 

HACMP for AIX, Version 4.3:Administration Guide, 

SC23-4279 for more information.

To define the adapters after defining the node names, first consult your 
planning worksheets for both TCP/IP and serial networks.

There are a number of attributes associated with an Adapter in the HACMP 
configuration which need to be specified:

Enter the IP label (the name) of the adapter you have 
chosen as the service address for this adapter. Adapter 
labels can be any ASCII text string consisting of 
alphabetical and numeric characters, underscores, and 
hyphens, up to 31 characters. 

If IP address takeover is defined for that adapter, a boot 
adapter (address) label has to be defined for it. Use a 
consistent naming convention for boot adapter labels. 
(You will choose the Add an Adapter option again to 
define the boot adapter when you finish defining the 
service adapter.) 
You can use hyphens in adapter labels. However, 
currently it might not be a good idea since the 

/usr/sbin/cluster/diag/clverify

 utility flags adapter 

labels that contain hyphens each time it runs.

Indicate the type of network to which this adapter is 
connected. Pre-installed network modules are listed on 
the pop-up pick list. 

The node names are logically sorted in their ascii order within HACMP in 
order to decide which nodes are considered to be neighbors for heartbeat 
purposes.

In order to build a logical ring, a node always talks to its up- and 
downstream neighbor in their node name’s ascii order. The uppermost and 
the lowest node are also considered neighbors.