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62 IBM System p5 520 and 520Q Technical Overview and Introduction
2.13.1 High availability using the HMC
The HMC is an important hardware component. HACMP Version 5.3 High Availability cluster
software can be used to activate resources automatically (where available), thus becoming
an integral part of the cluster. For some environments, we recommend that you work with
redundant HMCs.
POWER5 and POWER5+ processor-based systems have two service processor interfaces
(HMC port 1 and HMC port 2) available for connections to the HMC. We recommend that you
use both of them for redundant network configuration. Depending on your environment, you
have multiple options to configure the network. Figure 2-18 shows one possible highly
available configuration.
Figure 2-18 Highly available HMC and network architecture
Note that only hardware management networks (LAN1 and LAN2) are highly available on the
above picture in order to keep simplicity. However, management network (LAN3) can be
made highly available by using a similar concept and adding more Ethernet adapters to
LPARs and HMCs.
2.13.2 IBM System Planning Tool
The IBM System Planning Tool (SPT) is the next generation of the IBM LPAR Validation Tool
(LVT). It contains all of the function from the LVT and is integrated with the IBM Systems
Workload Estimator (WLE). System plans generated by the SPT can be deployed on the
system by the Hardware Management Console (HMC). The SPT is available to assist the
user in system planning, design, validation, and to provide a system validation report that
reflects the user’s system requirements while not exceeding system recommendations. The
SPT is a PC-based browser application designed to run in a stand-alone environment.
The IBM System Planning Tool can be downloaded at no additional charge from:
http://www.ibm.com/servers/eserver/support/tools/systemplanningtool/
The System Planning Tool (SPT) helps you design a system to fit your needs. You can use
the SPT to design a logically partitioned system or you can use the SPT to design an
HMC1 HMC2
p5 System A p5 System B
1 2
FSP
1 2
FSP
LAN 1 LAN 2
LPAR A1
LPAR A2
LPAR A3
LPAR B1
LPAR B2
LPAR B3
eth0 eth1
eth0 eth1
LAN1 – hardware management network for
first FSP ports (private)
LAN2 – hardware management network for
second FSP ports (private), separate
network hardware than LAN1
LAN3 - management network for WebSM
access to HMC from outside (public)
and for HMC to LPAR communication
LAN3 - outside connection