To Next Page

To Previous Page

108 IBM Power 770 and 780 (9117-MMD, 9179-MHD) Technical Overview and Introduction

Figure 2-38 shows one possible highly available HMC configuration that is managing two

servers. These servers have only one CEC and therefore only one FSP. Each HMC is

connected to one FSP port of all managed servers.

Figure 2-38 Highly available HMC and network architecture

Note that for simplicity, only hardware management networks (LAN1 and LAN2) are highly

available (Figure 2-38). However, the management network (LAN3) can be made

highly available by using a similar concept and adding more Ethernet adapters to LPARs

and HMCs.

Both HMCs must be on a separate virtual local area network (VLAN) to protect from any

network contention. Each HMC can be a DHCP server for its VLAN.

Redundant service processor connectivity

For the Power 770 and Power 780 with two or more CECs, two redundant service processors

are installed in CEC enclosures 1 and 2. Redundant service processor function requires that

each HMC must be attached to one Ethernet port in CEC enclosure 1 and one Ethernet port

in CEC enclosure 2.

HMC1 HMC2

System A 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

LAN1 – Hardware management network for

first FSP ports (private)

LAN2 – Hardware management network for

second FSP ports (private), separate

network hardware from LAN1

LAN3 – Open network for HMC access and

dLPAR operations

LAN3 – Open network

IBM Power 780 User Manual

Questions and Answers: