IBM REDPAPER 520Q, Technical Overview And Introduction

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Chapter 2. Architecture and technical overview
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Figure 2-17 HMC to service processor and LPARs network connection
The default mechanism for allocation of the IP addresses for the service processor HMC
ports is dynamic. The HMC can be configured as a DHCP server, providing the IP address at
the time the managed server is powered on. If the service processor of the managed server
does not receive the DHCP reply before time-out, predefined IP addresses set up on both
ports. Static IP address allocation is also an option. You can configure the IP address of the
service processor ports with a static IP address by using the Advanced System Management
Interface (ASMI) menus. See 2.15.7, “Service processor” on page 73 for predefined IP
addresses and additional information.
Functions performed by the HMC include:
򐂰 Creating and maintaining a multiple partition environment
򐂰 Displaying a virtual operating system session terminal for each partition
򐂰 Displaying a virtual operator panel of contents for each partition
򐂰 Detecting, reporting, and storing changes in hardware conditions
򐂰 Powering managed systems on and off
򐂰 Acting as a service focal point
The HMC provides both graphical and command line interface for all management tasks.
Remote connection to the HMC using Web-based System Manager or SSH is possible. For
accessing the graphical interface, you can use the Web-based System Manager Remote
Client running on the AIX 5L, Linux, or Windows® operating systems. The Web-based
System Manager client installation image can be downloaded from the HMC itself from the
following URL:
http://<hmc_address_or_name>/remote_client.html
Both unencrypted and encrypted Web-based System Manager connections are supported.
The command line interface is also available by using the SSH secure shell connection to the
HMC. The command line interface can be used by an external management system or a
partition to perform HMC operations remotely.
Note: If you need to access ASMI (for example, to set up the IP address of a new
processor-based server when HMC is not available or not providing DHCP
services), you can connect any client to one of the service processor HMC ports with any
kind of Ethernet cable, and use a Web browser to access the predefined IP address, such
as the following example:
https://192.168.2.147
Management LAN
`
eth0
eth1
p5 System
HMC 1
Service
Processor
L
PAR
1
L
PAR
2
L
PAR
..
.
L
PAR
n
eth0 eth0 eth0 eth0
HMC 2
HMC