Device has more traffic in subinterface than phisical interface

Products

• CA Performance Management - Usage and Administration
• DX NetOps

Issue/Introduction

We have a device in Performance Manager whose subinterface shows more traffic than its physical interface, and this should not be the case.

Environment

Release : any

Cause

Calculations are made based on the data we receive from the device;
If we receive wrong data we will present it in dashboards.

Resolution

Run a snmpwalk or collect dcdebug and verify if the raw data seems good;

In the example below the physical interface shows around 412 Mbit/sec:

Dec 05 16:45:58.458:       1.3.6.1.2.1.31.1.1.1.6.2 = 412937962065451

where the subinterface show around 715 Mbit/sec:

Dec 05 16:45:58.385:       1.3.6.1.2.1.31.1.1.1.6.18 = 715869199433953

This needs to be addressed by the device vendor.

Additional Information

How to collect logging for interface data issues in CA Performance Management