VNA ACI 403 Poll status failures in DX NetOps 25․4․4

Products

• Network Observability
• Virtual Network Assurance

Issue/Introduction

You experience ACI Plugin Poll status failures for IP Route Endpoints after upgrading to DX NetOps 25․4․4․​​​​​‌‍‍

Symptoms include "Failed" poll statuses in detailed views despite the Portal VNA Administration view showing a "Running" status for the engine․

VNA ERROR MESSAGE (oc.log):

"java․io․IOException: Server returned HTTP response code: 403 for URL: https://[IP_Address]/api/class/uribv4Route․json"

Environment

Virtual Network Assurance 24.3.x, 25.4.x

Resolution

1․ MODIFY ENGINE CONFIGURATION: Update the inventory XML to handle larger page sizes and increase processing threads․

Path: /opt/CA/VNA/collector/ACI_[Engine_ID]/repository/deviceConfig/ACI-Inventory․xml

Locate the MaxPageSize parameter (typically around line 804) and update the value:
<Value id="MaxPageSize">3000</Value>

Locate the VRF loop configuration and increase the thread count:
<ForEach in Var="vrfName" in="#{vrfsList}" threadNum="6">

EXPECTED: The engine processes larger data sets more efficiently without triggering 403 errors during pagination․
NOTE: No restart is required after saving these changes; the new values will be used in the next poll cycle․

VERIFY SUCCESS:

Detailed Poll Status returns "successfulApiRequestCount" matching the "totalApiRequestCount"․

Failed request counts drop to 0․

Memory usage remains below critical alarm thresholds․

Additional Information

Defect DE183286: Improve programmatic handling of 403 response codes during ACI polling․ This will be implemented in 25.4.6\7