IBM Power 780 Technical Overview And Introduction page 123

Figure 2-39 shows a redundant HMC and redundant service processor connectivity
configuration.
HMC1
LAN 1
1 2
FSP
CEC 1
LPAR 1
LPAR 2
LPAR 3
Figure 2-39 Redundant HMC connection and redundant service processor configuration
In a configuration with multiple systems or HMC, the customer is required to provide switches
or hubs to connect each HMC to the server FSP Ethernet ports in each system:
One HMC should connect to the port labeled HMC Port 1 on the first two CEC drawers
of each system.
A second HMC must be attached to HMC Port 2 on the first two CEC drawers of
each system.
This solution provides redundancy for both the HMC and the service processors.
LAN3 – Open network
HMC2
LAN1 –
LAN 2
LAN2 –
1 2
FSP
LAN3 -
CEC 2
Chapter 2. Architecture and technical overview
Hardware management network for
first FSP ports (private)
Hardware management network for
second FSP ports (private), separate
network hardware from LAN1
Open network for HMC access and
dLPAR operations
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