•SLIP
•SP Switch
•ATM
It is highly unlikely that you will add or remove a network module. For information about changing a characteristic of a Network Module, such as the failure detection rate, see the chapter on changing the cluster topology in the HACMP for AIX, Version 4.3: Administration Guide,
In HACMP/ES, topology services and group services are used instead of Network Interface Modules (NIMs) in order to keep track of the status of nodes, adapters or resources.
In HACMP/ES, the tuning of network sensitivity is a little different. Customizable attributes are the interval between heartbeats in seconds and the Fibrillate Count, which is the acceptable number of missed heartbeats before some event is triggered. You will find the Change / Show Topology and Group Services Configuration in the Cluster Topology screen, just like the NIM tuning options.
4.2.5 Synchronizing the Cluster Definition Across Nodes
Synchronization of the cluster topology ensures that the ODM data on all cluster nodes is in sync. The HACMP ODM entries must be the same on each node in the cluster. If the definitions are not synchronized across nodes, the HACMP for AIX software generates a
Even if you have a cluster defined with only one node, you must still synchronize the cluster.
The processing performed in synchronization varies depending on whether the cluster manager is active on the local node. If the cluster manager is not active on the local node when you select this option, the ODM data in the system default configuration directory (DCD) on the local node is copied to the ODMs stored in the DCDs on all cluster nodes. The cluster manager is typically not running when you synchronize the initial cluster configuration.
If the cluster manager is active on the local node, the ODM data stored in the DCDs on all cluster nodes are synchronized. In addition, the configuration data stored in the active configuration directory (ACD) on each cluster node is overwritten with the new configuration data, which becomes the new active
