Understanding Baseline Configuration and Metric Projections in DX NetOps

Products

• Network Observability

Issue/Introduction

How do we configure baseline calculations in the metric XML for thresholding and understand the projections generated by DX NetOps?

Environment

DX NetOps Peformance Management - All releases 

Resolution

To configure and understand baseline calculations and projections in DX NetOps, here are the key details:

Baseline Configuration:

1. Metric XML Configuration for Baseline Calculation:

   • The metric.xml configuration is used to perform baseline calculations.
   • The BaselineDefinitions section in the XML contains the definitions for the metric family.
   • Each metric in the AttributeGroup section with Baseline set to true requires a baseline definition.
   • Hourly Baseline: Required for both event processing and displaying baselines in reports.
   • Daily Baseline: Optional, used for displaying baselines in reports with a time frame of one month or greater.

2. Hourly Baseline for Thresholding:

   • Uses the same retention period as hourly rollups in retention settings.
   • Represents the same day/same hour.

3. Daily Baseline for Projections:

   • Uses the same retention period as daily rollups in retention settings.
   • Represents the same day.

Projections:

1. Metric Projection for Network and Capacity Planning:

   • Projections are based on up to 90 days of historical data.
   • Configurable for individual metrics with up to three projection intervals.
   • Projection Calculation Process:
     • Calculates daily percentile value from as-polled data.
     • Uses linear regression to calculate future values based on historical data.

2. Default Projections and Graphs:

   • Scorecard Projections: Visible in graphs even without baseline configuration, using live data for short-term projections.
   • No Default Projections Saved: No default projections are stored in the database due to resource constraints and disk space usage.

3. Timeframe for Projections:

   • Metric projections can be configured for intervals such as 20, 60, and 180 days.
   • Typically, the longer the projection interval, the less accurate the exact value.

References:

• For detailed configuration, refer to Metric Family XML Structure.
• To map between DA and Portal groups, refer to Mapping DA and Portal Groups.
• For group contents, see Group Contents Documentation.
• For device-type and sysoid, refer to DA Device Manageable Endpoint - <scheme>://<DA_HostName>:<Port>/rest/devices/manageable
• For specific attributes, refer to DA REST API.
• For additional REST API documentation, append /documentation to the DA REST endpoints (e.g., http://DA:8581/rest/eventprofilegroups/documentation).

Additional Information:

• For comprehensive information on Data Aggregator and Portal REST APIs, visit DX NetOps APIs Documentation.

By configuring the baselines and projections correctly, you can ensure accurate thresholding and trend analysis for effective network performance management.