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new check for single RE#5436

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Sagrohi:sagrohi/telemetry-fix
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new check for single RE#5436
Sagrohi wants to merge 1 commit into
openconfig:mainfrom
Sagrohi:sagrohi/telemetry-fix

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@Sagrohi Sagrohi commented May 7, 2026

Added a check to skip subcomponent leaf validation when it's a Single RE i.e NumControllerCards and fixed NPU regex to fetch 2 digit NPU's as well

@Sagrohi Sagrohi requested a review from a team as a code owner May 7, 2026 10:26
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Summary of Changes

Hello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request improves the telemetry inventory test suite by adding support for single Routing Engine (RE) devices and enhancing regex matching for NPU components. These changes ensure that subcomponent validation is appropriately skipped for single-controller configurations and that multi-digit NPU identifiers are correctly processed during testing.

Highlights

  • Single RE Device Support: Added logic to skip subcomponent leaf validation for devices with one or fewer controller cards.
  • NPU Regex Update: Updated the NPU regex to correctly identify multi-digit NPU identifiers.
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Pull Request Functional Test Report for #5436 / f76b650

Virtual Devices

Device Test Test Documentation Job Raw Log
Arista cEOS status
gNMI-1.4: Telemetry: Inventory
Cisco 8000E status
gNMI-1.4: Telemetry: Inventory
Cisco XRd status
gNMI-1.4: Telemetry: Inventory
Juniper ncPTX status
gNMI-1.4: Telemetry: Inventory
Nokia SR Linux status
gNMI-1.4: Telemetry: Inventory
Openconfig Lemming status
gNMI-1.4: Telemetry: Inventory

Hardware Devices

Device Test Test Documentation Raw Log
Arista 7808 status
gNMI-1.4: Telemetry: Inventory
Cisco 8808 status
gNMI-1.4: Telemetry: Inventory
Juniper PTX10008 status
gNMI-1.4: Telemetry: Inventory
Nokia 7250 IXR-10e status
gNMI-1.4: Telemetry: Inventory

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Code Review

This pull request updates the telemetry inventory test to support multi-digit NPU identifiers in the regex and introduces logic to skip subcomponent validation for devices with a single controller card. Feedback was provided regarding the controller card count check, which currently includes the default value of -1 and causes a regression in test coverage. A suggestion was made to refine this condition to specifically target counts of 0 or 1 and to use standard characters in code comments for consistency.

subcName := subc.GetName()
subComponent := gnmi.Lookup(t, dut, gnmi.OC().Component(subcName).State())
if !subComponent.IsPresent() {
if *args.NumControllerCards <= 1 { // ← skip for single RE devices
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high

The check *args.NumControllerCards <= 1 includes the default value of -1 (set in internal/args/args.go), which means this validation will be skipped by default on all devices where the flag is not explicitly provided. This is a regression in test coverage. The check should be restricted to valid counts of 0 or 1. Additionally, the arrow character is non-standard; maintain consistent code style by using standard characters in comments.

Suggested change
if *args.NumControllerCards <= 1 { // skip for single RE devices
if *args.NumControllerCards >= 0 && *args.NumControllerCards <= 1 { // skip for single RE devices
References
  1. In test suites, maintaining a consistent code style across similar tests is preferred.

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