Collecting and Viewing Historical PMs
Use this procedure to collect and view historical PMs for BTI7000 Series, BTI7800 Series, BTI800 Series, and BTI718E network elements, and supported interfaces on MX Series and PTX Series routers and QFX Series switches. See Nodal Management for Juniper Networks Routers and Switches for the list of supported interfaces.
For scheduled collections, ensure the scheduled historical PM retrieval capability is enabled and the retrieval schedule is set up. For information on how to do this, see the proNX Service Manager Installation and Administration Guide. By default, scheduled historical PM collection is disabled.
When using PSM to collect historical PMs from BTI800 Series network elements, you must perform additional steps on the network element itself. See Configuring Historical PM Collection on BTI800 Series Network Elements for information.
Historical PMs are PMs that are collected and binned (aggregated over a measurement interval, timestamped, and discretely stored) by the network element.
You can use PSM to retrieve these historical PMs on demand and/or on a regular, pre-defined schedule. When you enable scheduled historical PM collection, PSM retrieves historical PMs every 12 hours by default, which allows you time to correct any retrieval failures for the 1-day bin while minimizing unnecessary processing.
PSM stores these collected PMs in a database for 30 days and makes them available for viewing. PM data points older than 30 days are purged from the database.
Both 15-minute and 1-day bins are collected. PM points in 15-minute bins are timestamped on the hour and at every 15 minutes thereafter. PM points for the 1-day bin are timestamped at midnight (local time of the PSM Client).
For the list of historical PMs that PSM collects for BTI7000 Series, BTI800 Series, and BTI718E network elements and MX Series and PTX Series routers, see PM Counters. For information on BTI7800 Series historical PMs, see the BTI7800 Series documentation.
- Retrieve historical PMs from the NE.
This is performed automatically based on the collection schedule (default every 12 hours). Optionally, you can direct PSM to retrieve historical PMs on demand by right-clicking a network element in the Network tree or in the Topology Map view and selecting Retrieve Historical PMs. If you do this, you must wait for the retrieval task to complete before proceeding to the next step.
It is recommended that you always run scheduled collections. Depending solely on on-demand PM retrieval will limit the collected data to what is stored on the NEs at the time of the on-demand retrievals.
- From the main menu, choose View >Historical PMs, or click on the Historical PMs icon .
The Historical PMs window appears:
- Expand the
Historical PMs tree and select the PMs you want to display. You can
select PM points from more than one network element.
You can select which PMs you want to view but you cannot select which historical PMs you want PSM to retrieve. PSM retrieves all historical PMs from all discovered NEs.
Discovered and reachable network elements are shown in black. Discovered and unreachable network elements are shown in red. Undiscovered network elements are shown in grey.
This list might contain network elements (in grey) that no longer appear in the main Topology view. This can occur if the network elements are removed from the Topology view, but still have historical PM data associated with them.
When a port is reconfigured (e.g. with a different protocol), you will see PM points in the Historical PMs tree for both the old and the new protocol. This is normal behavior. PSM stores historical PM data for 30 days, at which time the data for the old protocol is purged.
- Select the time range you want to view by using the drop-down
menus in the Date-Time Selection pane.
- Click Plot to plot the graph.
The data is plotted and displayed in the Chart pane.
In the likely event that the From: and To: times do not fall on monitoring period boundaries at the NE, the time of the first and last collections shown might not match exactly the start and end times requested.
- To zoom in on the graph, click and drag the portion you
want to zoom, and then release.
The zoomed portion of the graph is displayed.
- To select other PM counters to display in the same date
and time range, go back to step 3. Remember
to deselect the PM counters from the current run first.
Alternatively, you can close and re-open the Historical PMs window, but you will need to set the date and time range again.