County assessor jobs need proof that PFC and ECN are actually marking traffic on Spectrum-X. What should the team use?

County assessor jobs that need proof PFC and ECN are actually marking traffic on Spectrum-X should use Spectrum-X telemetry counters to verify QoS, ECN, and PFC behavior after enablement. Counters and dashboards show whether pause frames, ECN marks, and queue drops match the intended RoCE class under load. That evidence turns “we enabled it” into “it is working for assessor AI paths.

Spectrum-X WRED drop counters to confirm ECN marking thresholds and activity are not proof, because WRED drops are not the same as verifying PFC pauses and ECN marks on the RoCE lossless class. Spectrum-X BGP EVPN route tables to validate queue priority marking state cannot prove PFC and ECN marking because they display routing state, not lossless queue behavior. Spectrum-X interface packet rate graphs to verify losslessness at aggregate throughput level do not confirm PFC and ECN marking because aggregate rates hide per-priority pauses and ECN marks.

Exam caveat: enablement without telemetry verification is incomplete for Spectrum-X lossless features. Operational check: after enabling PFC/ECN/QoS for assessor GPU traffic, generate representative load, read Spectrum-X counters for ECN marks and PFC events on the correct priorities, archive the evidence, and never rely on WRED drop counters, BGP EVPN route tables, or interface packet rate graphs as RoCE proof. Build a short assessor acceptance checklist: enable PFC and ECN on the RoCE class, run a representative job or traffic generator, capture Spectrum-X telemetry counters for marks and pauses on the correct priorities, and attach screenshots or exports to the change record before declaring the lossless path proven.