← 문제 라이브러리
Network Intermediate NETWORK-106 · 16 min

A QinQ handoff preserves the service VLAN but rewrites the inner PCP bits so voice traffic loses priority

무료
시나리오

Connectivity remains intact, but quality degrades because the handoff normalizes priority bits the downstream voice design expected to preserve.

먼저 볼 것
  • Identify the primary failure signal in the Encapsulation Preserved, QoS Lost scenario.
  • Separate visible symptoms from the underlying technical dependency.
  • Describe the safest recovery path and the follow-up prevention work.
점검 체크리스트
  1. Summarize the current impact and the last known change.
  2. Collect direct evidence from logs, runtime state, and configuration before changing anything.
  3. Separate immediate recovery from permanent prevention work.
복구와 재발 방지

Choose the smallest safe recovery action first, then record the prevention work that reduces repeat incidents.

같이 보면 좋은 질문
Should I translate commands, logs, or product names?

No. Keep commands, logs, file names, APIs, and product names unchanged, then explain the reasoning in the selected UI language.

What should the answer focus on?

State the root cause, the evidence that supports it, and the safest recovery direction.

Why can the scenario remain in the original language?

The source scenario is treated as an incident artifact. Guidance, checklist, hints, and explanations can be localized around it.