Fix LAG operational status for disabled member ports on Juniper devices

[priyaranjannanda]

Changes for Juniper Devices

• when LAG member port is disabled, the LAG oper status goes to LOWER_LAYER_DOWN instead of DOWN

[gemini-code-assist]

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 refines the test logic for Juniper devices within the 'telemetry_interface_last_change_test' suite. It specifically addresses how the operational status of a Link Aggregation Group (LAG) is expected to behave when a member port is disabled, ensuring that the test correctly anticipates a 'LOWER_LAYER_DOWN' status for Juniper devices under specific LAG flap test conditions.

Highlights

• Juniper LAG Operational Status: Adjusted the expected operational status for Juniper devices in LAG flap tests to 'LOWER_LAYER_DOWN' when a member port is disabled, aligning with actual device behavior.
• Test Logic Refinement: Modified the 'performLAGFlapTest' function to apply the Juniper-specific 'LOWER_LAYER_DOWN' status only for 'LAGMemberFlap' and 'OTGLAGFlap' test scenarios.

Changelog

• feature/interface/otg_tests/telemetry_interface_last_change_test/telemetry_interface_last_change_test.go
  • Updated the conditional logic for Juniper devices to correctly set the expected LAG operational status to 'LOWER_LAYER_DOWN' when a member port is disabled, specifically for 'LAGMemberFlap' and 'OTGLAGFlap' tests.

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[OpenConfigBot]

Pull Request Functional Test Report for #5183 / ac1dee7

Virtual Devices

Device	Test	Test Documentation	Job	Raw Log
Arista cEOS		gNMI-1.25: Telemetry: Interface Last Change Timestamp
Cisco 8000E		gNMI-1.25: Telemetry: Interface Last Change Timestamp
Cisco XRd		gNMI-1.25: Telemetry: Interface Last Change Timestamp
Juniper ncPTX		gNMI-1.25: Telemetry: Interface Last Change Timestamp
Nokia SR Linux		gNMI-1.25: Telemetry: Interface Last Change Timestamp
Openconfig Lemming		gNMI-1.25: Telemetry: Interface Last Change Timestamp

Hardware Devices

Device	Test	Test Documentation	Raw Log
Arista 7808		gNMI-1.25: Telemetry: Interface Last Change Timestamp
Cisco 8808		gNMI-1.25: Telemetry: Interface Last Change Timestamp
Juniper PTX10008		gNMI-1.25: Telemetry: Interface Last Change Timestamp
Nokia 7250 IXR-10e		gNMI-1.25: Telemetry: Interface Last Change Timestamp

Help

[gemini-code-assist]

Code Review

This pull request correctly fixes an issue with the expected LAG operational status on Juniper devices when a member port is disabled. The logic now correctly distinguishes between a full LAG flap and a member port flap. My feedback focuses on a minor improvement to enhance code maintainability by replacing magic strings with constants, which aligns with general Go style guidelines.