Cisco Ethernet switch Operations Instructions download pdf (Page 22)

8 Cisco Systems Intelligent Gigabit Ethernet Switch Module

only to be used when a daughter card is installed. Unless a daughter card is installed in one

or more processor blades, there is no need for Switch Modules 3 and 4. Further, the switch

modules have to be compatible with the LAN interface generated by the processor blade. If a

Fibre Channel daughter card is installed in a BladeCenter HS20 processor blade, Switch

Modules 3 and 4 must also be Fibre Channel-based, and any daughter cards installed in the

remaining BladeCenter HS20 processor blades must be Fibre Channel.

Figure 2-4 Gigabit Ethernet path

2.2 IBM eServer HS20 architecture

In this section, we discuss the architectural design of the IBM Eserver BladeCenter HS20.

This is presented as just one example of the blade design for a typical dual-processor server.

The BladeCenter HS20 uses the ServerWorks Grand Champion LE (or 4.0 Low End) chipset.

(See the HS20 architecture in Figure 2-5 on page 9.)

The Champion Memory and I/O Controller (CMIC) is the memory controller and interface for

the I/O buses supporting:

򐂰 Two Xeon processors

򐂰 Two DDR-SDRAM memory channels

The CMIC has two Inter Module Buses (IMB2) to two Champion I/O Bridge (CIOB-X2) chips.

The CMIC is also connected through a Thin IMB bus to the Champion South Bridge (CSB5).

IBM

BladeCenter™ -

Gigabit Ethernet path

Midplane (Upper Section)

Midplane (Lower Section)

SW Module 1

1………..14

SW Module 3

1………..14

SW Module 2

1………..14

SW Module 4

Network

Interface

Daughter

Card

SERDES

Ethernet

SERDES

Ethernet

LAN 1

LAN 3

LAN 4

LAN 2

Processor blade

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