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You have added devices to your network and created some views with which to generate reports. You have also generated the reports you need. Now you want to monitor the devices in your network inventory and determine their availability.
You can use Availability features to do the following:
The following sections are presented in this chapter:
For detailed information on Availability, refer to the online help.
Scenario: You want to monitor device availability, but first you must select Availability views.
To set views and polling options, perform the following steps:
Step 1 Select Admin > Availability > Change Polling Options.
The Select Polled Views dialog box appears. (See Figure 6-1.)
Step 2 Select the views you want to poll from the All Views list, then click Add.
Step 3 Select the views you want to delete from the Polled Views list, then click Delete.
Step 4 Click Next.
The Change Polling Options dialog box appears. (See Figure 6-2.)
Step 5 Select values from the drop-down list boxes to change any of the polling options, then click Finish.
You can use the Reachability Dashboard to view device reachability and learn when a device last responded. The Dashboard window is updated every minute.
Scenario: You want to determine the availability (or reachability) of the devices in all your views.
To view the Reachability Dashboard, perform the following steps:
Step 1 Select Tasks > Availability > Reachability Dashboard.
The Reachability Dashboard displays a report for each of the views. (See Figure 6-3.)
The Reachability Dashboard refreshes automatically every minute. Therefore, you can keep it on your desktop to receive constant updates. The down arrows indicate unreachable devices and the up arrows indicate reachable devices.
Step 2 Click the Device Name links to access the Device Center for more detailed information. (See Figure 6-4.)
Step 3 Click Close to close the report.
Scenario: You want to determine the overall availability of your network devices.
To determine network availability, perform the following steps:
Step 1 Select Tasks > Availability > Availability Monitor.
The Select Devices dialog box appears. (See Figure 6-5.)
Step 2 Select All in the Views column, click All in the Devices column, then click Finish.
The Availability Monitor report appears. (See Figure 6-6.)
The down arrows on the Availability Monitor report indicate unreachable devices; the up arrows indicate reachable devices.
Availability Monitor information is updated at half the SNMP polling rate.
Step 3 The Availability Monitor report contains several links for each device. For more detailed device information, click on any of the following links:
Step 4 Click Close to close the reports.
Scenario: Several devices on the network have crashed and reloaded overnight. You want to determine which devices reloaded and why.
To view your reload history, perform the following steps:
Step 1 Select Tasks > Availability > Reloads Report.
The Select Devices dialog box appears. (See Figure 6-5.)
Step 2 Select All from the Views column, then click All.
Step 3 Click Finish.
The Reloads Report appears. (See Figure 6-9.)
Step 4 Select the time (for example, 1 Day) from the Reports drop-down list box to view reload information for a specific time, then click Reports.
A results window displays information for the last 24 hours.
Scenario: One of the devices in your reloads report has a hyperlinked entry in the Reload Reason column. You view the Stack Decoder analysis to find out why the device reloaded.
To view the Stack Decoder analysis, perform the following steps from a reloads report:
Step 1 Click on a hyperlinked entry in the Reload Reason column. (See Figure 6-9.)
The Stack Decoder Trace and Analysis window displays error information.
Step 2 Click Back to return to the Reloads Report.
Scenario: You are preparing for a network rollout and want to determine the protocol distribution of devices on the network.
To determine the protocol distribution of a region, perform the following steps:
Step 1 Select Tasks > Availability > Protocol Distribution Graph.
The Select Devices dialog box appears. (See Figure 6-5.)
Step 2 Select devices from the Views column, click All, then click Finish.
The protocol distribution bar chart appears. (See Figure 6-10.)
Step 3 Select Pie Chart from the Reports drop-down list box, then click Reports.
The Protocol Distribution pie chart appears. (See Figure 6-11.)
Step 4 Click Close to close the report.
This completes the chapter on Availability.
Posted: Wed Oct 6 12:05:29 PDT 1999
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