24 IBM Flex System V7000 Storage Node Introduction and Implementation Guide
I/O adapter slots
The networking subsystem of the IBM Flex System Enterprise Chassis has been designed to
provide increased bandwidth and flexibility. The new design also allows for more ports on the
available expansion adapters, which will allow for greater flexibility and efficiency with your
system’s design.
There are four I/O adapter slots on the IBM Flex System p460 Compute Node. The I/O
adapters for the p460 have their own connector that plugs into the IBM Flex System
Enterprise Chassis midplane. There is no onboard network capability in the Power Systems
compute nodes other than the Flexible Service Processor (FSP) NIC interface.
The I/O is controlled by four P7-IOC I/O controller hub chips. This provides additional
flexibility when assigning resources within Virtual I/O Server (VIOS) to specific Virtual
Machine/LPARs.
1.5 I/O modules
The Enterprise Chassis can accommodate a total of four I/O modules which are installed in
vertical orientation into the rear of the chassis, as shown in Figure 1-13, where the four
modules at the back of the chassis with the bays numbered. In addition to the two types of
switches listed in Table 1-1 on page 6, there are alternative I/O modules that provide external
connectivity, as well as connecting internally to each of the nodes within the chassis. They
can be either Switch or Pass through modules with a potential to support other types in the
future. These models can be ordered in “build to order” IBM Flex Systems solutions.
Figure 1-13 IBM Flex System Enterprise Chassis with I/O module bays numbered
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