SAI API Online Diagnostics - #2339
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Signed-off-by: Strahinja Perak <sperak@cisco.com>
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Summary
This proposal introduces the Online Diagnostics capability in SAI to validate switch datapath health while the device remains in service.
Online Diagnostics is modeled as a switch-scoped capability that periodically injects diagnostic probes, verifies proper packet reception/integrity and reports aggregated counters and health events to the NOS application.
Key Changes
doc/SAI-Proposal-Online-Diag.mdwith the motivation, architecture and attribute specifications.inc/saiswitch.h):SAI_SWITCH_ATTR_ONLINE_DIAG_ENABLESAI_SWITCH_ATTR_ONLINE_DIAG_INTERVAL_MSSAI_SWITCH_ATTR_ONLINE_DIAG_LOSS_THRESHOLDSAI_SWITCH_ATTR_ONLINE_DIAG_PAYLOAD_PATTERNSSAI_SWITCH_ATTR_ONLINE_DIAG_PACKET_LENGTHSSAI_SWITCH_STAT_ONLINE_DIAG_TX_PACKETS,SAI_SWITCH_STAT_ONLINE_DIAG_RX_PACKETS,SAI_SWITCH_STAT_ONLINE_DIAG_PACKET_LOSS,SAI_SWITCH_STAT_ONLINE_DIAG_PACKET_CORRUPTIONS.inc/saitypes.h):SAI_HEALTH_DATA_TYPE_ONLINE_DIAGtosai_health_data_type_t.sai_switch_online_diag_event_type_tandsai_online_diag_health_data_t.sai_health_data_tto report online diagnostic loss, corruption, and recovery events via the existing switch health event callback.Motivation
Standardizes an in-service active datapath health-check mechanism across silicon vendors, allowing applications to detect internal packet loss and corruption with configurable intervals and thresholds.
https://sonicfoundation.dev/2025-sonic-hackathon-most-innovative-award-spotlight-data-path-diagnostics-on-sonic/