OAM-PM Top N Worst Sessions report

Overview

The OAM-PM Top N Worst Sessions report shows the worst case OAM-PM sessions over a specified time period, grouped by session. The report includes OAM data for NEs managed by the NFM-P and MDM (model-driven Nokia NEs).

The report includes the following session types:

ETH-CFM Session
TWAMP-Light Session

Use cases

QoS analysis—Identify potential service impacting issues between specific NEs.

Limitations

Report limitations include:

There is a limitation in the length of string which is passed when you choose Select All for the display name for some report inputs; in particular, when you multiselect a report input, you cannot exceed a string length of 65,000 octets.
When the report is exported to the DOCX or PPT file type, some data may not display or the table may not align properly.

Prerequisites

The following sessions need to be performed in the NSP and NFM-P for the report to be created:

A DMM session must be defined with accounting enabled in both MDM-managed and NFM-P NEs.
A TWAMP-Light session must be defined with accounting enabled in both MDM-managed and NFM-P NEs.
You must enable aggregation using NSP. For more information, see the Telemetry information on the Network Developer Portal and the NSP Data Collection and Analysis Guide.

Report inputs

The following table shows the report inputs.

Table 18-27: OAM-PM Top N Worst Sessions report inputs

Prompt	Notes
Session Type	ETH-CFM Session, TWAMP-Light Session
End Date	Calendar date or relative date (for example, two days ago) and time
Granularity	Aggregation types: None (raw collection interval) Hourly Daily Monthly
Report Range	Length of time to be reported, in minutes (minutes, min), hours (hours, h), days (days, d), or months (months, m)
Source Node	Search using partial or full names. Select individual items or click Select All. Both the NE name and its IP address display.
Target Node
Bin Type	Frame Delay—Average Delay, Maximum Delay, Minimum Delay Frame Delay Range—Average Delay Range, Maximum Delay Range, Minimum Delay Range Inter Frame Delay Variation—Average Delay Variation, Maximum Delay Variation, Minimum Delay Variation
Test Factor
Result set limit	Number of results to report
Interval Duration	5 minutes, 15 minutes, 1 hour, or 1 day
Logo resource ID	The logo to add to the report. Enter the Resource ID of the logo image in the Images folder. The default is the Nokia logo. To create the report without a logo, leave the Logo Resource ID field blank.
Logo Position	Choose Left, Middle, or Right. The logo appears on the left on the first page of the report if you choose Left or Middle.
Show report output on one page	Select the check box to enable pagination. Note: Using the Show report output on one page option when creating reports as drill-downs may impact report rendering time. Nokia recommends disabling the Show report output on one page option when creating reports.

Report characteristics

The following table lists the principal report characteristics.

Table 18-28: OAM-PM Top N Worst Sessions report characteristics

Characteristic	Value
Data type	OAM session statistics
Source database	Auxiliary database
NE types supported	7210 SAS-M 24F, 7210 SAS-M 24F 2XFP, 7210 SAS-M 24F 2XFP ETR, 7210 SAS-T 12F 10T 4XFP, 7210 SAS-T 12F 10T 4XFP ETR, 7210 SAS-X 24F 2XFP, 7210 SAS-K, 7210 SAS-R6, 7210 SAS-R12, 7210 SAS-S/SX 1/10GE VC 7250 IXR-6, 7250 IXR-R6, 7250 IXR-s, 7250 IXR-10, 7250 IXR-e all 7450 ESS variants all 7750 SR variants (support both Classic and MDM modes) all 7950 XRS variants
Drill-down support	Yes: Click on a delay result to show an OAM-PM Latency report. Click on a loss result to show an OAM-PM Loss report.

Examples

The following figures show report examples.