v
The customer may elect to configure a subset of Cluster Nodes with additional
external storage - for example as Storage Nodes for GPFS. This may be a Fiber
Channel solution (using a FAStT storage subsystem).
v
A supported distribution of the Linux operating system.
v
Cluster management software such as CSM.
CSM maintains a database of configuration information about the nodes that are
configured in the Cluster 1350. The following CSM command run on the
management server will display this node information: lsnode -Al
The output of this command provides a great deal of information about each node
such as its type, model number, serial number, and hostname. The output also
provides important information that relates each node to the terminal server
network and service processor network. For the terminal server network, the
output includes the console server hostname and the console port number to
which the node is connected. For the service processor network, the output
includes the hostname of the Falcon card to which the node is connected and the
internal service processor name for the node.
CSM distinguishes between the management node, pre-managed nodes, and
managed nodes. Pre-managed nodes are nodes that have been added to the
configuration but are not yet ready to be managed, for example, because they have
not yet been installed. Running lsnode -P on the management server will generate
a list of pre-managed nodes in the configuration while lsnode only lists the
managed nodes. Running mgmtsvr from any node will display the management
server.
Isolating network, node, and Linux problems
Cluster 1350 nodes are connected over a 10/100 Mbit Ethernet Cluster network. A
Cluster 1350 may also have a second network, either an additional Ethernet
network or a Myrinet 2000 network.
As a preliminary diagnostic step, ping all the nodes over all available networks.
Note the results and compare the symptoms seen to Table 11
Table 11. Troubleshooting the shared VLAN
Symptom
Action
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