I/O modules
The BladeCenter unit supports from one to four hot-swap I/O modules. Table 1
identifies the type of I/O module you can install in each I/O-module bay. See
http://www.ibm.com/support/ for a list of supported I/O modules. See “Rear view” on
page 16 for the location of the I/O-module bays on the BladeCenter unit.
Table 1. Hot-swap I/O-module types by location
Bays I/O-module function Permissible I/O module
1 and 2 Network connections 1 and 2
(Ethernet) are used for all
blade servers in the
BladeCenter unit.
One of the following combinations:
v Two Ethernet switch modules
v Two pass-thru modules
v One Ethernet switch module and one
pass-thru module
3 and 4 Network connections 3 and 4
are used for all I/O expansion
options on blade servers in
the BladeCenter unit.
One of the following combinations:
v Two Ethernet switch modules
v Two Fibre Channel switch modules
v Two pass-thru modules
Important:
v The modules that are used must support the
network interface that is used on the I/O
expansion options.
v The I/O modules in bays 3 and 4 must be
the same type.
Notes:
1. The enumeration of the Ethernet controllers in a blade server is
operating-system dependent. You can verify the Ethernet controller designations
that a blade server uses through your operating-system settings.
2. The routing of an Ethernet controller to a particular I/O-module bay depends on
the type of blade server. You can verify which Ethernet controller is routed to
which I/O-module bay by using the following test:
a. Install only one Ethernet switch module or pass-thru module, in I/O-module
bay 1.
b. Make sure that the ports on the switch module or pass-thru module are
enabled. See the management-module User’s Guide for instructions.
c. Enable only one of the Ethernet controllers on the blade server. Note the
designation that the blade-server operating system has for the controller.
d. Ping an external computer on the network that the switch module or
pass-thru module is connected to.
If you can ping the external computer, the Ethernet controller that you enabled
is associated with the I/O module in I/O-module bay 1. The other Ethernet
controller in the blade server is associated with the I/O module in I/O-module
bay 2.
Your BladeCenter unit supports a minimum of one hot-swap Ethernet switch module
or pass-thru module, in I/O-module bay 1 or 2. This I/O module provides an internal
connection to an integrated Ethernet controller in all the blade servers in the
BladeCenter unit, up to 14 internal connections per I/O module. To provide an
internal connection for the second integrated Ethernet controller in each blade
server, install an Ethernet switch module or pass-thru module in the available
I/O-module bay (I/O-module bay 1 or bay 2).
6 BladeCenter E Type 8677: Installation and User’s Guide
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