IBM BladeCenter - Chapter 2. Installing and Removing a Switch Module; Ethernet Interface Requirements

Chapter 2. Installing and removing a switch module
The following illustration shows the switch-module bay locations.
AC
AC
DC
DC
Switch module
bay 3
Switch module bay 1
Switch module bay 4
Switch module bay 2
Attention: To maintain proper system cooling, each module bay must contain
either a module or a filler module; each blade bay must contain either a blade or a
filler blade.
Ethernet interface requirements
Your BladeCenter unit supports a minimum of one hot-swap Ethernet switch module
in switch-module bay 1. This switch module is a fully functional four-connector
Ethernet switch that provides a network connection to Ethernet Link 1 in all the
blade servers in the BladeCenter unit. To provide a network connection for Ethernet
Link 2 in each blade server, install an Ethernet switch module in switch-module
bay 2.
If you install an interface option on any blade server, you must install a hot-swap
switch module of the same interface type in switch-module bay 3 to obtain
connection 1 for the interface option. To provide connection 2 for the interface
option, install a switch module of that interface type in switch-module bay 4. The
switch modules in bays 3 and 4 provide connections to all the interface options in
the BladeCenter unit.
Important: The switch modules in switch-module bays 3 and 4 and all blade server
interface options in the BladeCenter unit must use the same interface type. For
example: if you install an Ethernet interface option on a blade server, the switch
modules that you install in switch-module bays 3 and 4 must be Ethernet, and all
other interface options in the BladeCenter unit must also be Ethernet interface
options.
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