HP OpenView System Administration Handbook [Electronic resources] : Network Node Manager, Customer Views, Service Information Portal, HP OpenView Operations نسخه متنی

4.5 WEB ACCESS

With the advent of everything becoming web accessible, NNM ships with the Apache web and application servers in order to provide the ultimate in remote access. The web and application servers are both installed automatically when you install NNM. The web interface consists of three distinct components: the OpenView Launcher (Figure 4-23), the Network Presenter (Figure 4-24), and Dynamic Views (Figure 4-25). The OpenView Launcher and the Network Presenter provide read-only access to allow operators to remotely monitor the network via a web browser, while Dynamic Views provides flexible and full control of NNM.

4.5.1 The OpenView Launcher

Access to NNM via a web browser on Unix is slightly different than accessing NNM on Windows. You need to specify the port 8880 if NNM is running on a Unix system. To access the OpenView Launcher from a web browser, enter the following URL where

hostname is the name of the management server running NNM:

For NNM running on a Unix system, enter http://hostname:8880/OvCgi/ovlaunch.exe. Access to the OpenView Launcher was changed in version NNM 6.3 (and later versions) to port 3443. For Unix systems, access the launcher by specifying the URL http://hostname:3443/OvCgi/ovlaunch.exe

For NNM running on a Windows system, enter the following URL

without a port number: http://hostname/OvCgi/ovlaunch.exe

This displays the Welcome page and the Launcher window (Figure 4-23). The Launcher has five tabs located at the bottom third of the launcher.

Each Launcher tab provides Java-based access to NNM tools. The tabs provide the following functions from left to right:

• Object Views
  Provides access to the SNMP MIB Browser and IP Network

• Tasks
  Provides Event Correlation configuration and the ability to create, modify and schedule reports. Report templates include availability, exception, inventory, and performance

• Information and reports list
  Provides the ability to list the reports generated from the Tasks tab

• Tools list
  Provides access to the Network Presenter, Alarms Browser, Event Correlation Configuration, Report Presenter, Report Configuration, SNMP Data Presenter, SNMP MIB Browser, Unused IP addresses, and Home Base

• Online help
  Provides online help for using all Java-based components of NNM. Online help can also be access by specifying the URL http://hostname:3443/OvCgi/OvWebHelp.exe in your browser.

Some of the functions listed under the tabs include access to the submaps (the Network Presenter), access to the MIB browser, and access to the report generation and report display. The OpenView Launcher provides many of the commonly used tools that an operator may use in routine troubleshooting activities. For example, the tools tab gives you the ability to select a device and ping it. The Launcher can be customized using

Web Launcher Registration Files (WLRF) to extend its functionality. WLRFs customization is discussed in Chapter 7, "Advanced Customization."

4.5.2 The Network Presenter

From the Launcher window, expand

IP Network by clicking the "+" shown in the network launcher window. Double-click

IP Network from the list and to launch the java applet Network Presenter. First you'll see the message that the applet is starting then you'll see the Network Presenter as shown in Figure 4-24.

The Network Presenter is divided into two panes. Clicking the plus sign beside the network object expands the left pane. As you can see, the right pane of the network presenter looks similar to the ovw GUI. You can drill down into different submaps by double-clicking the symbols in the right pane. You can also use the toolbar icons in the same way as the native interface. Although some of the menu bar items are not present in the Network Presenter interface, this interface makes an excellent thin client. You are able to access NNM maps and troubleshoot networking problems with any supported web browser.

4.5.3 Dynamic Views

Dynamic Views provides the ability to present specific information based on user criteria from a Java-based web interface. It fully enables the network to be monitored remotely. Dynamic Views allow the network to be viewed from a single pane of glass as opposed to the hierarchical views provided by submaps. Dynamic Views provides flexibility to view the network based on what is interesting to the user.

Dynamic Views can be accessed from the ovw menu selection

ToolsViews , from the Network Presenter selection

ToolsViews , and from the NNM Launcher Tools tab. You can also access Home Base by typing the URL http://hostname:7510 in your browser. When NNM is installed on your system, the Apache application server is started on TCP port 7510 in order to provide access to Dynamic Views.

Home Base, shown in Figure 4-25, is the launching point of Dynamic Views. Home Base lists the number of events of each severity (Critical, Major, Minor, etc.) contained in the Alarms Browser. It also shows the number of events and percentage of events in each severity. Home Base displays the node status summary of your network as a pie chart. As you place the cursor over a section of the chart, it displays the number of events of that severity.

Path View and Neighbor View are available from the drop-down list on Home Base. Click the

[Launch] button to access a different view. By default, nothing exists in the dynamic views of the browsers. You customize them based on the criteria of interest.

Additional views that allow discovery of services, such as OSPF and VLANS, can be included added by installing and configuring the Extended Topology Discovery component of NNM. The Extended Topology discovery process is achieved by executing the PERL script

setupExtTopo.ovpl , available on Windows systems in the directory %OV_BIN% and on Unix systems in the directory $OV_BIN.

The default views available from Home Base include but are not limited to:[3]

[3] The Extended Topology component of NNM provides discovery and display of services such as OSPF and VLANS.

• Neighbor View
  Provides a graphical representation of the path between a specified device and its connector devices allowing a specified number of hops from the specified device (see Figure 4-26).

  Figure 4-26. The Neighbor View allows you to specify a device and all connector devices up to 9 hops from the device. It displays the connector devices up to the number of hops specified on a single pane of glass.

  
  

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• Node View
  Provides a graphical representation of a set of nodes as defined by the ovw filters file by selecting a minimum severity and IP address range (see Chapter 9, "Scalability and Distribution," for a list of pre-defined filters.

  Figure 4-27. The Node View can be used to narrow the display criteria while allowing the user to view the network. The devices displayed in this Node View are defined by the NetInfrastructure filter and have a minimum severity of Warning.

  
  

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• Station View
  Provides a graphical representation of the collection stations and management stations as discovered by NNM. This is applicable in an environment that uses more that one NNM station and is discussed in Chapter 9.

• Internet View
  Provides a graphical representation of the networks in your IP Internet view. This allows you to view a high level of the overall status of your network.

• Network View
  Provides a table presenting the segments in a specific network.

• Path View
  Provides a graphical representation of the shortest path between two nodes.

The Node View is another interesting view of your network. A number of filters can be selected from a drop-down list in order to narrow your display criteria. NNM filters are user-defined and are covered in Chapter 9. The Node View also allows you to specify and IP address range. The Node View shown in Figure 4-27 uses the filter NetInfrastructure with a minimum status of Warning in the IP address range of *.*.*.* (all devices).

The Network View provides a table presenting the segments in a specific network. This table lists the segment name, segment type, segment status, node name and node status, as shown in Figure 4-28. The Network View can assist in isolating network and system problems.

Detailed device information can be acquired by double-clicking a symbol in Dynamic Views. (Recall that double-clicking a symbol in the ovw GUI drills down into the next-level submap.) The most crucial information is provided when you place the cursor over a symbol, as shown in Figure 4-29.

The symbol popup menu mentioned previously in this chapter is available by right-clicking a symbol in Dynamic Views. Note that the menu items available from Dynamic Views are slightly different than the menu items available from the ovw interface. The following menu options are available via the symbol popup menu in Dynamic Views:

• Open
  Displays a tabular view of the symbol.

• Details
  Displays detailed device information (hostname, IP address, hardware, etc.).

• Poll Node
  Sends a configuration poll to the device.

• Status Poll
  Sends a status poll (ping) to the device.

• Test IP/TCP/SNMP
  Sends an IP, TCP, and SNMP request to test the device.

• Trace Route
  Executes the traceroute command to the device to trace the path to the selected device.

• Ping
  Send, five pings to the device.

• Telnet
  Executes a telnet session to the device.

• Expand Connecting Neighbor
  Expands only neighbors that are directly connected to the selected device.

• Expand All Neighbors
  Expands neighbors.

• Show Path to Additional Nodes

• Path View
  Provides a graphical representation of the shortest path between two nodes.

• Neighbor View
  Allows you to specify a device and all connector devices up to 9 hops from the device

• Launch View in New Window
  Displays all the above commands in a new window. By default, this is turned off so that a new window is NOT opened when executing the above options.

• Manage
  Enables status polling to the device.

• Unmanage
  Disables status polling to the device.

The Alarms Browser tab available from Home Base can be used to access the NNM Alarms, as shown in Figure 4-30. The Alarms Browser tab displays the alarm categories (Error, Status, Threshold, etc). To display alarms from any of the categories, click the category of interest. Select

[All Alarms] to display all the alarms in the browser.

In order to allow better troubleshooting, you can display device detail from within the browser. Select

ActionsViewsSource Details from the Alarms Browser menu bar to list device detail, as shown in Figures 4-31 and 4-32.

Information provided by Source Details includes the Hostname, the IP address, the hardware description, whether the device supports SNMP, the

System Object ID (OID), and the type of network interfaces available on the device. The NNM Node ID used to internally identify the device is also displayed. Source Details for a device are shown in Figure 4-32.

Device Details is also available via the symbol pop-up menu by right-clicking a symbol and selecting Details. The same information can also be accessed by double-clicking the device from Dynamic Views.