Troubleshooting Drills
Packet Hunt: Asymmetric Paths and Silent Drops
Chase a performance ghost through ECMP, PMTUD oddities, and ACL shadows with mentors narrating the hunt.
Troubleshooting Advanced Remote
Tuition (informational)
410,000 KRW
No checkout on this site—coordinators confirm scope before invoices.
Weekend intensive
2 sessions · 10 lab hours
Scenario brief
You receive intermittent user reports that resist reproduction. The lab seeds subtle asymmetry, a hungry middlebox, and a syslog line easy to dismiss. Your job is to build a timeline, isolate the layer, and propose a fix that survives scrutiny.
Lead mentor
Eunji Han
Still excited by traceroute anomalies most people swipe away.
Inside the lab
- Synthetic traffic with adjustable jitter
- Guided use of capture filters without scroll fatigue
- Whiteboard templates for writing incident narratives
- Rotating clues so pairs cannot copy last cohort verbatim
- Mentor voice notes when you stall for more than twenty minutes
- Checklist for involving application owners without blame theater
- Debrief on communicating uncertainty to leadership
Outcomes
- Separate correlation from causation under time pressure
- Choose the smallest verification step before big changes
- Leave the next operator a story, not a pile of PCAPs
Logistics questions
We publish methodology, not click-by-click fixes, so the hunt stays honest for the next group.
Cohort notes
“Packet Hunt humbled me in hour one and rewarded me in hour six. The ACL shadow clue still haunts me—in a good way.”
Gray
Via Google