// course
DNS & DHCP Operations Clinic
Recursive vs authoritative splits, TTL discipline, and lease scoping under load.
5,100,000 VND (informational)
Overview
Break intentional misconfigurations, then restore service under time pressure. Capsule scenarios mirror SME outages we have seen in HCMC.
Included focus areas
- Broken zone files with subtle typos
- Split-horizon whiteboard session
- DHCP failover pairing lab
- TTL change communication template
- Packet capture clues for NXDOMAIN storms
- Postmortem outline graded
- Bilingual glossary for desk handoff
Outcomes
- Resolve three seeded outage stories
- Propose TTL changes with stakeholder note
- Write a DHCP scope migration checklist
Lead mentor
Quynh Mai Ly
Infrastructure generalist; former MSP owner.
FAQ
BIND and a second server type mirrored conceptually — not vendor cert prep.
Experience notes
NXDOMAIN storm capture looked like our Friday night — uncomfortably accurate.