A city GPU fabric missed short-lived congestion with periodic polls. What should operators enable?
Select an answer to reveal the explanation.
Short Explanation
Short congestion is like a blink you miss even with faster SNMP polling, because the burst can still happen between polls. Turn on WJH so the city GPU fabric catches those real-time Spectrum events instead of empty poll gaps.
Full Explanation
City GPU fabrics often suffer microbursts that last far less than a typical SNMP or telemetry poll interval. Periodic polls therefore miss short-lived Spectrum congestion even when citizen-facing inference latency briefly spikes. Enabling What You See Happening (WJH) captures those transient Spectrum events in real time so municipal operators can see buffer pressure, PFC-related activity, or path symptoms that polls never recorded.
Why the other options fail by concept: faster SNMP polling of Spectrum counters still samples only at intervals and can miss microbursts between polls, and averaged counters do not expose the transient buffer or PFC events that WJH captures in real time. Configuring Spectrum VLAN-based rate-limiting to reduce switch forwarding load fails because throttling traffic is a mitigation lever, not a visibility tool; it does nothing to expose the microburst-level events that periodic polling already misses, and it can itself starve the AI flows operators are trying to protect. sFlow sampling on Spectrum switches for flow-based congestion trend analysis fails because sampled flow data can miss microbursts between samples and only reveals trends after the fact, so it cannot capture the real-time transient Spectrum events that WJH records.
Exam caveat: WJH complements—not replaces—baseline telemetry; operators still need capacity planning and QoS/PFC design. WJH volume can be high, so scope event categories and retention to the city fabric domains that carry AI traffic rather than drowning on-call in noise.
Operational check: reproduce or wait for a known short congestion window on a city GPU leaf uplink, confirm a WJH event appears with a timestamp inside that window while the periodic poll still shows a clean average, and document that WJH is enabled and streaming after any Spectrum software change.