Cisco InfiniBand 4x User's Guide download pdf (Page 25)

Chapter 1. IBM BladeCenter products and technology 11

IBM BladeCenter H chassis has a total of ten I/O bays. Each blade bay has a total of eight

dedicated connection paths to the I/O modules. See Figure 1-7.

Figure 1-7 BladeCenter H internal connections

The bays are as follows:

򐂰 Bays 1 and 2 only support standard Ethernet-compatible I/O modules, which includes

Ethernet switch modules as well as optical and fiber pass-thru modules. These are routed

internally to the onboard Ethernet controllers on the blades (and slot 1 in the SIO and

BSE2 expansion blades).

򐂰 Bays 3 and 4 can be used either for standard switch or pass-through modules (such as

Fibre Channel connectivity or additional Ethernet ports) or for bridge modules. These are

routed internally to the PCI-X connector on the blades.

򐂰 Bays 5 and 6 are dedicated for bridge modules only and do not directly connect to the

blade bays. Bridge modules provide links to the I/O bays 7 through 10 and can be used as

additional outputs for I/O modules in those bays.

When I/O bays 3 and 4 have bridge modules installed, they are connected the high-speed

module bays as shown in Figure 1-7 and are not directly connected to the blades. In this

configuration, bay 3 provides redundancy for bay 5, and bay 4 provides redundancy for

bay 6.

򐂰 I/O bays 7 through 10 are used for high-speed switch modules such as a Cisco 4X

InfiniBand Switch Module. this also includes the MSIM, which allows the placement of low

speed modules into the high speed slots. In either case, these are routed internally to the

PCI Express connector on blades that have it. The Cisco 4X InfiniBand Switch Module is

connected to bays 7 and 9 and bays 8 and 10 are not used.

Onboard

Ethernet

Bay 1

Bay 2

Bay 5Bay 9

Bay 10 Bay 6

Low speed module

or bridge bays

High speed

module bays

Bay 7

Bay 8

Ethernet bays

Low-speed module

bays

Bridge modules

bays

High speed

module bays

Only if bays 3 and

4 have bridge

modules

PCI-X

PCI-E

14 blade servers

Bay 4

Bay 3

BladeCenter H internal connections

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