3.1.3 Starting network monitoring

This subsection describes how to monitor a network by displaying the map windows (topology maps) of the network configuration. NNMi performs network monitoring. For example, the operation management center always displays the most important map on a large screen to monitor the network. Immediately after specifying discovery settings, you can check the progress of node discovery.

Before you begin

Before you can start monitoring the network, the person (operator) responsible for the monitoring operation must be registered as a user.

Procedure

Access the NNMi console.
In the Topology Maps workspace, click Network Overview.
Check the statuses of the nodes based on the colors and details of the icons.
If you select an icon on the map, detailed information is displayed in the Analysis pane at the bottom of the window. You can display or hide the Analysis pane by clicking .

Tip

To check the MIB information for a node, use the nnmsnmpwalk.ovpl command.

Icon colors and their meanings

By using the more than 6,000 types of device information registered in Device Profiles of the Configuration workspace, device types are automatically decided. When a device profile is decided, the shape of the icon used in maps is decided according to the category (device category). The following table shows the icon colors and their meanings in maps.

Icon color	Meaning	Icon color	Meaning
Green	Normal	Red	Critical
Light blue	Warning	Blue	Unknown
Yellow	Minor	Gray	Disable
Orange	Major	Beige	No Status

For details about icons, see the topic About Map Symbols in the Help Use.

Note

To temporarily stop monitoring during maintenance: You can stop monitoring and rediscovery by selecting a node from the topology map, selecting Management Mode from the Actions menu, and then selecting OUT OF SERVICE. Alternatively, you can stop monitoring by using the nnmmanagementmode.ovpl command to change the management mode to out of service.
To resume monitoring: To resume monitoring, select the node from the topology map, select Management Mode from the Actions menu, and then select Manage. Alternatively, you can resume monitoring by using the nnmmanagementmode.ovpl command to change the management mode to managed.
To list the nodes that were removed from the nodes to be managed: In the Management Mode workspace, click Unmanaged Nodes.

Tip

In general, a window times out if you do not perform any operations for a certain period of time. You can set the timeout time in the console timeout section that is displayed by clicking the Configuration workspace, User Interface, and then User Interface Configuration. The default is 18 hours.

Note that a window that you open by specifying a URL will not time out. If you want to continuously display a topology map for monitoring, specify the applicable URL.

Network Overview

http://host-name:port-number/nnm/launch?cmd=showNetworkOverview
Node Group Maps

http://host-name:port-number/nnm/launch?cmd=showNodeGroup&name=node-group-name^#

#: To include a multi-byte character in a URL, you need to URL-encode the character. Use UTF-8 encoding to URL-encode the node group name, and then specify the name.

Example: Important node: %e9%87%8d%e8%a6%81%e3%81%aa%e3%83%8e%e3%83%bc%e3%83%89

In addition, to open multiple windows for monitoring, such as a topology map and an incident window, click [Figure] to display the view in a new window. Alternatively, you can display multiple windows by entering a URL to open a window.

Tip: To set the initial window that is displayed when you sign in, specify the setting in the initial view section that is displayed by clicking User Interface Configuration. To display incidents, specify Open Key Incidents. To display a map, specify Network Overview. Note that, although you can also set a node group map created by a user for the initial window, you can specify only the first or last item in the map list. For this reason, you need to adjust the Topology Maps Ordering setting in the Node Group Map Settings window. For details, see the Configure the NNMi User Interface in the Help for Administer.

Next steps

You have now successfully displayed the topology map. Next, start monitoring the network.