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Hardware Management Console Best Practices

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HMC for establishing a trusted communication channel between the HMC and the

partitions on the managed server. Some of the tasks performed through this

channel include:

• Dynamic allocation of hardware resources on the partitions

• Graceful shutdown of the AIX operating systems running on the partitions

• Send hardware error log entries from the AIX partitions to the HMC to

provide a single focal point for error collection

RMC uses port 657 for HMC-to-partition communication. Initially, the TCP

protocol was used, but in recent releases of AIX and HMC code, the

connectionless User Datagram Protocol (UDP) has been implemented. RMC

employs access control lists to authenticate communication between the partitions

and the HMC. The authentication is established during configuration steps on the

HMC, thus, when transmitting messages over port 657, the HMC and the partition

can be sure with whom they are communicating. For additional information

regarding RMC and Reliable Cluster Scalable Technology refer to the

Information Center.

4.10 CIM and Cluster System Management

The HMC uses Open CIMOM (Common Information Model Object Manager) to

model the hardware resources of the managed servers. It is therefore CIM

compliant and can provide information about its CIM objects to remote CIM

clients. A CIM server runs on the HMC and listens on port 5988 for remote CIM

requests. Only requests that supply a valid user ID and password on the HMC are

honored. The Cluster System Management (CSM) managing server uses this

facility on the HMC to perform various hardware control functions such as power

on/off of partitions or servers in an IBM System Cluster 1600 environment. The

same SSL protocol used by the WebSM client and server can be used to secure

the communication between CIM clients and the HMC.

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Do+Able Products 12347 Manual de usuario Pagina 22