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Chapter 15. Replacing the Myrinet 2000 Gigabit switch
The 2 Gb Myrinet switch is an 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 and storage nodes. Use the installation
procedures in the applicable server documentation to replace a Myrinet PCI board.
The GM software for running the Myrinet board resides in the cluster and storage
nodes, so no new installation of software is required when a Myrinet PCI board is
replaced.
Myrinet switch chassis
The Myrinet switch contains the following replaceable components:
8-port line card
Management Module
Blower module
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 22.
If the backplane fails in the Myrinet switch, you must replace the entire switch
chassis. Use the following steps to replace the chassis:
1. Make sure that the cluster is not running critical applications.
2. If the optical cables connected to the switch are not labeled, place labels on the
3. Disconnect the optical cables from the connectors on the Myrinet switch. You do
© Copyright IBM Corp. 2004
Provides the connections to the storage and cluster nodes. The line cards
plug into slots in the switch chassis.
Manages and routes the Myrinet traffic, polling the ports and building tables
to control the addressing of messages.
Cools the Myrinet Switch Chassis
Table 22. Myrinet Chassis Sizes and Capacities
Slots in switch
Line cards
5
1-4
9
1-8
17
1-16
cables so they can be located to their respective connectors when the new
chassis is installed.
not need to power down or change the configuration of the switch before doing
this.
Note: Be sure to install dust caps on all the connectors after the cables are
removed.
Nodes supported
EIA slots consumed
4-32
4
4-64
6
4-128
10
67
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Troubleshooting
