IBM System Cluster 1350, Installation And Service

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Chapter 19. Myrinet 2000
Contents
The 2-Gbit Myrinet Switch is a customer option that provides high-speed
communication between the Storage Nodes and Cluster Nodes, over an optical
cable. It requires a Myrinet Switch chassis in the Primary Cabinet and a Myrinet
PCI adapter in each Storage Node and Cluster Node.
Myrinet PCI board
The Myrinet PCI board resides in the Cluster (x335) and Storage (x345, x360)
Nodes. Use the installation procedures in the appropriate server’s documentation
to replace a Myrinet PCI board.
The GM software for running the Myrinet board should already reside on the
Cluster and Storage Nodes, so no new installation of software should be required
when a Myrinet PCI board is replaced.
Myrinet switch chassis
The Myrinet Switch contains the following replaceable components:
8-port line card
Provides the connections to the Storage and Cluster Nodes. The line cards
plug into slots in the Switch chassis.
Management Module
Manages and routes the Myrinet traffic, polling the ports and building
tables to control the addressing of messages.
Blower module
Cools the Myrinet Switch Chassis
All of these components can be hot-swapped. The Myrinet documentation
discusses installation of these components.
The three Myrinet Chassis sizes available are described in Table 21.
Table 21. Myrinet Chassis Sizes and Capacities
Slots in Switch Line Cards Nodes Supported EIA Slots Consumed
5 1-4 4-32 4
9 1-8 4-64 6
17 1-16 4-128 10
If the backplane fails in the Myrinet Switch, you must replace the entire Switch
chassis. Use the following steps to replace the chassis:
1. Ensure that the cluster is not running critical applications.
2. If the optical cables connected to the Switch are not labeled, place labels on the
cables so they can be located to their respective connectors when the new
chassis is installed.
© Copyright IBM Corp. 2003
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