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Event Management and Best Practices by Michael Wallace, Guilherme Pereira, Jacqueline Meckwood, Peter Glasmacher, Tony Bhe

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Chapter 5. Overview of IBM Tivoli Switch Analyzer 157
From within the Tivoli NetView Web console, select the device on the map,
and select Object Properties
Other to display fields that provide the IP
Status, Layer2Status, and status for each interface.
򐂰 Command line utilities
These two commands display the Layer2Status field for layer 2 devices:
/usr/OV/bin/ovobjprint -s selectionname
/usr/OV/bin/ovtopodump -l selectionname
selectionname is either the fully qualified IP name or the IP address if it
cannot be resolved.
򐂰 Submap Explorer
You can use the System Configuration view to display the Layer2Status field
and the IP Status field. If the status changes, this view is not dynamic and
must be refreshed to show the change.
5.2.4 Integration into NetView’s topology map
In addition to trap notification for layer 2 problems, the map symbol status for
layer 2 devices is updated. Layer 2 connector devices are displayed in the
Network and Segment submaps. Without Tivoli Switch Analyzer installed, the
status of NetView devices is determined from the status of their interfaces. This
means that the status of layer 2 device symbols depends on the status of a single
management IP interface.
Tivoli NetView Web console
You can use the Tivoli NetView Web console to display the status of a layer 2
device. Select the device on the map, and select Object Properties. Then on the
Object Properties window (Figure 5-8), select Other in the left pane to display
fields that provide the IP Status, Layer2Status, and status for each interface. On
Windows platforms, it also displays all of the service objects.
Note: On Windows, the status of services also contributes to the status of the
layer 2 device symbol. When the Tivoli Switch Analyzer program is installed,
the status of only the layer 2 device symbols is determined by either their IP
status or layer 2 status, whichever is more severe. For example, if the
management interface is Up, but the layer 2 status indicates that one or more
ports have failed, then the status of the layer 2 device symbol is Marginal.
158 Event Management and Best Practices
Figure 5-8 The Layer2 Status Dialog of the Web Console
Discovery problems
IBM Tivoli Switch Analyzer does send an SNMP query to the switch that it is
trying to discover. For this reason, it must have the correct community name. IBM
Tivoli Switch Analyzer uses the community names as defined in netmon. If this
community is wrong or not defined for a switch, you see the series of messages
in the /usr/OV/ITSL2/log/topo_server.log file (Example 5-2).
Example 5-2 Messages in the /user/OV/ITSL2/topo_server.log file
"... start discovery process for node [10.20.30.40|<community name>]
... L2 ERROR for node [10.20.30.40]: SNMP request timed out
[.1.3.6.1.2.1.17.1.1.0]
... end discovery process for node [10.20.30.40]: 1
... L2 ERROR for request [n]: unable to discover layer 2 interfaces"

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