View Health Monitoring Information

A built-in mechanism monitors the health of the Data Aggregator and the Data Collector devices. Self-monitoring monitoring profiles determine the statistics that are discovered and polled for these devices. The discovered statistics are collected automatically.
A built-in mechanism monitors the health of the data aggregator and the data collector devices. Self-monitoring monitoring profiles determine the statistics that are discovered and polled for these devices. The discovered statistics are collected automatically.
Do not change or stop this self-monitoring.
As an administrator, you want to monitor your data aggregator and data collector items so that you can manage their performances proactively and you can perform capacity planning.
In this scenario, you will view the monitoring profiles that are associated with data aggregator and data collector self-monitoring. You will also view the components that are being monitored on the data aggregator device. This information helps you to understand how the health of these items is managed.
You will also create dynamic trend views, where you can view changes that are occurring on data aggregator over time. This information is useful when you are troubleshooting performance issues and performing capacity planning.
To view health monitoring information, follow these steps:
View Metric Families That Are Associated with Self-Monitoring
You can view the metric families that are related to the self-monitoring of the data aggregator and the data collector. You can also view the metrics within these metric families, which are used for polling the devices. This information helps you to gain an understanding of what types of data is collected and at what rates the data is collected. You can then understand how the health of these devices is managed. You will see this information in the view that you will create later in this scenario.
Follow these steps:
  1. Log in to
    NetOps Portal
    as an administrator.
  2. Select
    Administration
    , and click a data aggregator data source.
    The
    Data Aggregator Admin
    pages open.
  3. Click
    Monitoring Profiles
    from the
    Monitoring Configuration
    menu.
  4. Select each "DA Health (<Rate>)" monitoring profile individually and view the corresponding metric families on the
    Metric Families
    tab.
    To view a description for each metric family, hover over it.
  5. Make a note of the metric families you see on the
    Metric Families
    tab.
  6. Click
    Metric Families
    from the
    Monitoring Configuration
    menu.
  7. Find and select each metric family individually and view the specific metrics that are collected on the
    Metrics
    tab.
View Monitored Components on the Data Aggregator
You can view which components are being monitored on the data aggregator. You can also view the polling status on the components. For example, for capacity planning purposes, you can see all of the data collector instances that are being monitored on the data aggregator instance.
Only data collector instances for the tenant that you are administering are displayed. In an enterprise environment, you will likely only use the default tenant workspace, and therefore will see all of the data collector instances.
Follow these steps:
  1. Click
    Monitored Devices
    from the
    Monitored Inventory
    menu for a data aggregator data source.
  2. Expand the
    All Data Aggregators
    folder, and then select the data aggregator device.
    The
    Polled Metric Families
    tab shows the metric families that are associated with the data aggregator device.
    The
    Components
    table for a given metric family shows the polling status on the discovered components.
    When new components are discovered on the self-monitoring metric family, the components are monitored automatically. Performing an "Update Metric Family" operation on a self-monitoring metric family will result in no change in the state of monitoring.
Create a Group
As an administrator, you can create a custom group to organize managed devices in
NetOps Portal
. In this scenario, you create a group for the data aggregator device. The Data Aggregator device becomes the context for the view you will create in a later step.
Follow these steps:
  1. Log in to
    NetOps Portal
    as a user with the Administrator role.
  2. Hover over
    Administration
    ,
    Group Settings
    , and then click
    Groups
    .
    The
    Manage Groups
    dialog opens.
  3. To find a location for the new group, expand nodes in the Groups tree. Create the group under the All Groups node in the Groups tree, or within an existing custom or site group. You cannot add groups to system groups, which appear "locked" in the Groups tree.
    We recommend that you create this group under a node where only you have access rights.
  4. Right-click the node, and select
    Add Group
    .
    The
    Add Group
    window opens. The
    New
    tab is selected by default.
  5. Enter "Data Aggregators" as the name of the group and optionally provide a description.
  6. Select
    Custom
    from the
    Group Type
    list.
  7. Click
    Save
    .
    The new group appears in the
    Groups
    tree.
  8. Select the
    Data Aggregators
    group that you created.
  9. Click the
    Items
    tab in the right pane.
  10. Click
    Add Item
    Type.
    The
    Add Items
    dialog opens.
    The list of items refreshes to show items of the selected type that are available to add to the group. The available items depend on the item type, the data sources that are registered, and the items discovered.
    To see more pages of items, click the links below the list. Or use the Search field to search for an item in the list.
  11. Select the [email protected]
    ip_address
    item, and then click
    Add Items
    .
    • ip_address
      Indicates the IP address of the data aggregator device.
  12. Click
    Close
    .
    The
    Add Items
    dialog closes. The
    Items
    tab shows the [email protected]
    ip_address
    device that you added. Synchronization with data aggregator can take up to 5 minutes to begin.
Create a Dashboard and View Relevant Information
Custom dashboards are useful for displaying data from a particular item or group of items. (
Item
can be a device, component, or interface.) In this scenario, you want to display self-monitoring data on the data aggregator item. In particular, you want to look at the Polled Item Count metric, the SNMP Poll Failure Count metric, and the SNMP Request Count metric. By looking at this information, you can view any changes that are occurring over time. Use this information when troubleshooting performance issues and when you are performing capacity planning.
Follow these steps:
  1. Click the
    Dashboards
    tab.
    The
    Available Dashboards
    page opens. Each view on the page corresponds to a menu.
  2. Click
    Add Dashboard
    next to the menu where you want the new dashboard to appear.
    The
    Add Dashboard
    page opens.
  3. Complete the following fields:
    1. Enter "Data Aggregator Health" in the
      Menu Item
      and
      Dashboard
      Title fields.
    2. (Optional) Select a layout template for the dashboard.
      Each layout treats the page as a table with rows and columns for views. The layout buttons indicate the number of views in each column and row on the page.
      Select your layout before you add the Dynamic Trend View. If you change the layout after you add a view, the views will be removed.
  4. Expand
    Dynamic Views
    in the left pane. Select and drag the Dynamic Trend View to the page layout, and drop the view where you want it to appear.
  5. To create two more Dynamic Trend Views, select the view, and then click
    Copy
    twice.
  6. Add the
    Polled Item Count
    metric to the first view. Add the
    SNMP Poll Failure Count
    metric to the second view. Add the
    SNMP Request Count
    metric to the third view. To add the metrics to the view, do the following steps:
    1. Select the Dynamic Trend View, and then click
      Edit
      .
    2. If it is not already selected, select
      Device
      from the
      Context Type
      drop-down box.
    3. For the title, enter "Polled Item Count" for the first view, "SNMP Poll Failure Count" for the second view, and "SNMP Request Count" for the third view.
    4. Keep the default,
      Multitrend
      , as the View Type.
    5. Select the
      DA Data Collector Polling Statistics
      metric family for each view.
      It can take a few minutes for the available metric families to synchronize with
      NetOps Portal
      . If the self-monitor metric families are not immediately available, wait a few minutes and then try again.
    6. Select the
      Polled Item Count - Average
      metric value for the first dynamic trend view. Select the
      SNMP Poll Failure Count - Total
      metric value for the second view. Select the
      SNMP Request Count - Total
      metric value for the third view.
    7. Select the
      Add Groups
      radio button and then click the
      Add/Remove Groups
      button. Select the
      Data Aggregators
      group that you created previously from the list of available groups, and then move it to the list of selected groups. Click
      OK
      .
    8. Click
      Save
      .
    Your report is generated automatically.
  7. View any changes that are occurring over time.
    For example:
    • Polled item count increases when you were
      not
      expecting it to - Did you unintentionally start monitoring more items?
    • Polled item count remains the same, but you see spikes in the SNMP Request Count occasionally - Do you have change detection turned on in one of your monitoring profiles or perhaps scheduled discoveries?
    • Polled item count remains the same, but you see changes in the SNMP Poll Failure Count - Perhaps there has been a network outage.
    • Polled item count increases and the SNMP Poll Failure Count increases - Perhaps the data collector is overloaded and cannot respond to all of the requests.