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Additional partitions using virtualization can implement the required Ethernet adapters as
virtual Ethernet adapters. Virtual Ethernet adapters can be used for all kinds of inter-partition
communication. To connect the virtual Ethernet LANs to an external network, one or more
Shared Ethernet Adapters (SEAs) can be used in the Virtual I/O Server partition.
Note: When dedicated physical LPARs are a requirement, be certain to look at the total
cost of the configuration. Consider other OpenPower systems offering additional dedicated
devices under the covers against the cost of an external storage enclosure and the
OpenPower 710 server. Or use of the POWER Hypervisor and Virtual I/O Server feature.
2.8.3 Hardware Management Console
The HMC is a dedicated workstation that provides a graphical user interface for configuring
and operating IBM Eserver OpenPower 710 servers functioning in either non-partitioned,
LPAR, or clustered environments. It is configured with a set of hardware management
applications for configuring and partitioning the server. One HMC is capable of controlling
multiple POWER5 processor-based systems.
Note: If the POWER Hypervisor is
connected HMC can only provide hardware functions such as manage service utilities,
perform code updates, and provide power cycle control.
Note: At the time of writing, one HMC supports up to 32 POWER5 processor-based
systems and up to 256 LPARs using the HMC machine code Version 4.4.
For updates of the machine code and HMC functions and hardware prerequisites refer to the
following Web page:
https://techsupport.services.ibm.com/server/hmc/power5
POWER5 processor-based system HMCs require Ethernet connectivity. Ensure that sufficient
Ethernet adapters are available to enable public and private networks, if you need both.
The HMC 7310 Model C04 is a desktop model with only one integrated 10/100/1000 Mbps
Ethernet port, but two additional PCI slots.
The 7310 Model CR3 is a 1U, 19-inch rack-mountable drawer that has two native
10/100/1000 Mbps Ethernet ports and two additional PCI slots.
Note: It is possible to use virtual Ethernet and shared Ethernet adapter for an HMC
connection to partitions.
The HMC connects to the OpenPower 710 server using a standard 10/100 Ethernet
connection and uses HMC Port 1. A second HMC can be attached to HMC Port 2 of the
OpenPower 710 server for redundancy. For more details of the possible HMC network
connections refer to Managing your server → Hardware Management Console → HMC
Concepts → Types of HMC network connections at the IBM Sserver Hardware
Information Center at:
http://publib.boulder.ibm.com/infocenter/eserver/v1r2s/en_US/index.htm
Note: Both HMC Ethernet ports are only visible to the service processor.
not
activated on an OpenPower 710 server, a
Chapter 2. Architecture and technical overview
33
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