IBM Type 8677, Type 1881 manual Bays Module function Permissible I/O module

The following table summarizes the types of modules that can be used in each I/O-module bay. See “Rear view” on page 10 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		One of the following combinations:
	(Ethernet) for all blade servers in the	v Two Ethernet switch modules
	BladeCenter unit	v Two pass-thru modules
		v One Ethernet module and one
		pass-thru module
3 and 4 Network connections 3 and 4 (from all		One of the following combinations:
	blade server I/O expansion options on	v Two Ethernet switch modules
	blade servers in the BladeCenter unit)	v Two Fibre Channel switch modules
		v Two pass-thru modules
		v One pass-thru module and one
		Ethernet switch module
		v One pass-thru module and one Fibre
		Channel switch module

Important:

v The modules used must support the

network interface used on the I/O expansion options.

v You cannot combine Ethernet and Fibre Channel switch modules in bays 3 and 4.

Notes:

1.The enumeration of the Ethernet controllers in a blade server is operating-system dependent. You can verify the Ethernet controller designations

ablade 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 the ports on the switch module or pass-thru module are enabled (see the User's Guide or Command-Line Interface Reference Guide for your management module type for instructions).

c.Enable only one of the Ethernet controllers on the blade server. Note the designation the blade server operating system has for the controller.

d.Ping an external computer on the network connected to the switch module.

If you can ping the external computer, the Ethernet controller you enabled is associated with the switch module in I/O-module bay 1. The other Ethernet controller in the blade server is associated with the switch module in I/O-module bay 2.

3.If you have installed an I/O expansion option on a blade server, communications from the option are routed to I/O-module bays 3 and 4. You can verify which controller on the option is routed to which I/O-module bay by performing the test in note 2, using a controller on the I/O expansion option and a compatible switch module or pass-thru module in I/O-module bay 3 or 4.

Chapter 4. Installing options 35