NTA displays no CBQoS data for some devices

6/5/2019 9:27 PM

10/24/2025 8:55 PM

While all devices have a similar CBQoS configuration, there are some devices not displaying CBQoS data in NTA. The following errors can be seen in the NTABusinessLayer.log file:

[STP SmartThreadPool Thread #219052] ERROR SolarWinds.Netflow.Processing.CBQoS.Parser.QosSnmpResultParser - CBQoS result from NodeID 442 is invalid, counters for 2 class maps have Post-Policy or Drop Bytes value greater than Pre-Policy Bytes. Dropping whole result.
[STP SmartThreadPool Thread #219052] ERROR SolarWinds.Netflow.Processing.CBQoS.Processing.CbqosProcessingManager - Received invalid or corrupted CBQoS result from NodeID 442. Dropping the result.

Netflow Traffic Analyzer

SNMP counters on the device are corrupt or just simply storing incorrect data.

• Check Pre Policy Bytes OIDs (1.3.6.1.4.1.9.9.166.1.15.1.1.6) with at least two SNMP walks to mimic polling intervals in order to calculate the delta of the counters, if the counters are the same then the value is '0'. 
• Check Post Policy Bytes OIDs (1.3.6.1.4.1.9.9.166.1.15.1.1.10) with at least two SNMP walks to mimic polling intervals in order to calculate the delta of the counters, if the counters are the same then the value is '0'. 
• If the Post Policy Bytes are larger than the Pre Policy bytes values then the data is corrupt.
• CBQOS issue similar happening to a specific device type/model: CBQoS Counter Data Unavailable when Polling Cisco Catalyst 3850

Reboot the device to reset the SNMP counters.