Datasheet

IBM Flex System PCIe Expansion Node 5
When adapters are installed in the two I/O expansion slots, they connect to the chassis midplane and
provide additional connections to I/O module bays in the chassis. Table 3 shows the connections between
the expansion slots and the module bays. Note that the ports available from the adapter vary, depending
on whether the adapter is a 2-port or 4-port adapter. Similarly, the number of ports to the I/O module
depend on the number of ports activated in the switch.
Table 3. Adapter-to-I/O bay correspondence
I/O expansion slot Port on the adapter Corresponding I/O module bay
in the chassis
Port 1 Module bay 1
Port 2 Module bay 2
Port 3* Module bay 1**
Slot 1
(Compute Node)
Port 4* Module bay 2**
Port 1 Module bay 3
Port 2 Module bay 4
Port 3* Module bay 3**
Slot 2
(Compute Node)
Port 4* Module bay 4**
Port 1 Module bay 1
Port 2 Module bay 2
Port 3* Module bay 1**
Slot 3
(Expansion Node)
Port 4* Module bay 2**
Port 1 Module bay 3
Port 2 Module bay 4
Port 3* Module bay 3**
Slot 4
(Expansion Node)
Port 4* Module bay 4**
* Ports 3 and 4 require that a four-port card be installed in the expansion slot.
** Might require one or more port upgrades to be installed in the I/O module.