Add SONiC HLD for Forwarding Path Online Diagnostics#2442
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Define the community SONiC integration model for forwarding path online diagnostics: CONFIG/APPL/STATE DB schema, SwitchOrch and flex-counter design, CLI, telemetry, and testing requirements mapped to the upstream SAI Online Diagnostics proposal.
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Summary
SwitchOrchintegration, Flex Counter polling for aggregate TX/RX/loss/corruption stats, multi-ASIC behavior, warmboot impact, and a test plan.Authors: Anand Mehra, Xiaohu Huang, Sridhar Talari
Motivation
Forwarding path online diagnostics provide switch-scoped active datapath health checks through periodic probe injection and validation. The upstream SAI Online Diagnostics proposal standardizes this capability across vendors. SONiC needs a community design for how forwarding path online diagnostics are configured, observed, and tested.
Test plan
SAI_SWITCH_ATTR_ONLINE_DIAG_*,SAI_SWITCH_STAT_ONLINE_DIAG_*)SwitchOrch, CLI, and flex counters per this HLDRelated work