Administration Guide › Managing Virtual Environments › IBM PowerVM (LPAR) › How to Configure the PowerVM Management Components › Interaction Between AIX LPAR Management Components › IBM PowerVM Configuration Use Cases

IBM PowerVM Configuration Use Cases

The following use cases describe the handling of LPAR AIM instance entries for managed PowerVM environment in the Administration tab:

• You add an HMC Server and an LPAR AIM instance.

  The AIM discovers:

  • Power Systems associated with the HMC.
  • Virtual I/O Servers associated with the Power systems. The AIM applied the default VIOS credentials specified when adding the HMC.

    Important! If you do not specify the default VIOS credentials for an HMC Server, provide the VIOS credential for each VIOS in the Virtual I/O Servers panel to complete the configuration of the discovered VIOS. If the default VIOS credentials do not apply to a particular VIOS, you can overwrite the credentials in the Virtual I/O Servers panel.

• Preferred AIM

  Two AIMs can manage one HMC. When second AIM is added it becomes the redundant AIM, the AIM added first becomes the preferred AIM. The status of the HMC under the redundant AIM becomes Suspended. This status reflects that the HMC is managed by the preferred AIM. You can change the preferred AIM in the HMC/IVM Servers panel.

• Dual HMC feature supports configurations where a P System is associated with two HMC servers.

  P-Server and associated HMC servers are one atomic management entity and as such have to be managed by one AIM. The dual HMC configuration is only supported in the scope of one AIM. For example, one Power System, P1 is connected to two HMC servers, HMC1 and HMC2. Both HMC servers are managed by one AIM, AIM1.

• Dual HMC failover

  If the preferred HMC fails, the redundant HMC starts managing your System automatically. The redundant HMC becomes the current one. However, when the preferred HMC becomes available, the current HMC is not changed. To manage your System by the preferred HMC again, change the current HMC in the LPAR AIM Server panel on the Administration, Configuration tab.

  Note: If a preferred HMC fails, the redundant HMC manages your System. After the failover, you can change the current HMC for your System manually.

• You do not specify the default VIOS credentials of enter incorrect Virtual I/O Server credentials.

  The user interface displays a message about the failure of the operation. When you try to apply incorrect Virtual I/O Server credentials (), the Virtual I/O Server changes to "authentication failed" state. The managed system instance changes from "pending VIOS" state to "out-of-date" due to connection problems.

• You add a managed system instance without Virtual I/O Servers.

  The managed system instance appears in the instances table in "ready" state.

• You add a P-server to a managed system.

  The new P-server and VIOS are discovered automatically. If VIOS credentials match the default VIOS credentials, no configuration is required. If the VIOS credentials do not match the default VIOS credentials, set the VIOS credentials on AIM instances ().

• You remove a Virtual I/O Server in "invalid configuration" state from a managed system.

  The LPAR AIM removes the corresponding record from the instance table and the managed system changes to 'ready' state.

• You remove a Virtual I/O Server in "ready" state from a managed system.

  The LPAR AIM removes the corresponding record from the instance table.

• You remove a managed system instance with one or two Virtual I/O Servers.

  The managed system instance and associated Virtual I/O Server entries disappear from the instances table.

• The IBM PowerVM administration pane displays status information through icons and tooltips.

  Detailed tooltips become visible when you hover the cursor over warning and error icons.

  The following icons can appear:

  Discovery in progress

  No polling

  Error

  Warning

  Disabled

  Unknown