System information

54 Logical Partitions on System i5
Figure 3-9 Private direct networking
If you need to make changes to the network, these can be done manually within the HMC
interface.
3.3.2 Private indirect networking
A private indirect network shown in Figure 3-10 is effectively the same as private network, but
the signals pass through one or many hubs/switches. In Figure 3-10 we show two servers
connected to a hub and two HMCs connected to the same hub/switch.
Figure 3-10 HMC with indirect network attach
One HMC is connected to IBM Service and Support. This HMC is actively managing both the
servers. The second HMC is connected but redundant, in that it is not actively managing
either of the servers, unless you are at GA2 level of HMC/SP.
We do not have any recommendation for the type of hub or switch that can be used in this
arrangement. We would suggest that the customer connects the HMC directly to start, and
then installs the network devices once they are confident with the HMC operation and
management.