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[RT-2.11] Watch AFT entries instead of Get#5311

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yini101 wants to merge 1 commit intoopenconfig:mainfrom
yini101:rt-2.11-fix
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[RT-2.11] Watch AFT entries instead of Get#5311
yini101 wants to merge 1 commit intoopenconfig:mainfrom
yini101:rt-2.11-fix

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@yini101 yini101 commented Apr 7, 2026

Replace gnmi.Get with gnmi.Watch (2-minute timeout) for IPv4 and IPv6 AFT entry checks in Route_checks. After disabling IS-IS passive and awaiting adjacency UP, the dut requires additional time to settle before the AFT entry is visible via gNMI.

@yini101 yini101 requested a review from a team as a code owner April 7, 2026 03:58
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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 updates the ISIS interface level passive test to improve reliability when verifying AFT entries. By transitioning from an immediate get operation to a watch operation with a defined timeout, the test now correctly handles the latency required for the device under test to update its forwarding table after IS-IS adjacency transitions.

Highlights

  • Switching to gNMI Watch: Replaced immediate gnmi.Get calls with gnmi.Watch for IPv4 and IPv6 AFT entry validation to accommodate device settling time.
  • Timeout Implementation: Introduced a 2-minute timeout for the AFT entry checks to ensure the DUT has sufficient time to propagate routes after adjacency changes.
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Code Review

This pull request updates the ISIS interface level passive test to use gnmi.Watch instead of gnmi.Get for verifying IPv4 and IPv6 AFT entries, which improves reliability by allowing for state convergence. The review feedback suggests simplifying the watch predicates to use val.IsPresent(), noting that the current prefix comparisons are redundant because the paths are already keyed by the routes and may be flaky for IPv6 due to different string representations.

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AmrNJ commented Apr 10, 2026

/fptest hardware

Replace gnmi.Get with gnmi.Watch (2-minute timeout) for IPv4 and IPv6
AFT entry checks in Route_checks. After disabling IS-IS passive and
awaiting adjacency UP, the dut requires additional time to settle
before the AFT entry is visible via gNMI.
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