Chapter 2. Architecture and technical overview 105
DLPAR (processors, memory, I/O, and so on)
Custom groups
HMC management
The last group relates to the management of the HMC itself, its maintenance, security, and
configuration, for example:
Guided set-up wizard
Electronic Service Agent set up wizard
User Management
– User IDs
– Authorization levels
– Customizable authorization
Disconnect and reconnect
Network Security
– Remote operation enable and disable
– User definable SSL certificates
Console logging
HMC Redundancy
Scheduled operations
Back-up and restore
Updates and upgrades
Customizable message of the day
The HMC provides both a graphical interface and command-line interface (CLI) for all
management tasks. Remote connection to the HMC using a web browser is possible (as of
HMC Version 7; previous versions required a special client program called WebSM). The CLI
is also available by using the Secure Shell (SSH) connection to the HMC. It can be used by
an external management system or a partition to remotely perform many HMC operations.
2.12.3 HMC code
If attaching an HMC to a new server or adding function to an existing server that requires a
firmware update, the HMC machine code might need to be updated.
To determine the HMC machine code level that is required for the firmware level on any
server, go to the following website to access Fix Central and the Fix Level Recommendation
Tool (FLRT) on or after the planned availability date for this product. FLRT will identify the
correct HMC machine code for the selected system firmware level.
http://www-933.ibm.com/support/fixcentral/
If a single HMC is attached to multiple servers, the HMC machine code level must be updated
to the server with the most recent firmware level. All prior levels of server firmware are
supported with the latest HMC machine code level.
An HMC is required to manage POWER7+ processor-based servers implementing
partitioning. Multiple POWER7+ processor-based servers can be supported by a single HMC.
If an HMC is used to manage any POWER7+ processor-based server, the HMC must be
either of the following models:
Model CR3, or later, rack-mounted
Model C05, or later, deskside HMC
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