Incident Library

Component

Network switch

네트워크 스위치 · network-switch

6 cases · 2012 to 2026

Root cause Operator error2Software defect2DNS or network fault1Hardware failure1
Contributing factor Excessive blast radius2Monitoring blind spot2Unverified assumption1Automation amplification1Change during peak hours1Limited debug access1Harmful manual action1No runbook1No safeguard on destructive change1No staged rollout1Overlapping failures1Single point of failure1
Symptom High latency3Network unreachable3Intermittent connection failures2Service outage2High error rate1Intermittent timeouts1Node NotReady1Packet loss1Storage disconnected or stale mounts1
Organisation DeNA1GitHub1IONOS Cloud1Linode1OpenStreetMap Foundation1Scaleway1

Cases, by severity

  1. IL-0568 A layer 2 loop after an access switch change broke network traffic across a whole DeNA site, with mass MACFLAP logsDeNA · 2026

    Root cause Operator error

  2. IL-0349 IONOS Private Cloud in Berlin lost management access, storage and VM internet routing after a VLAN changeIONOS Cloud · 2026

    Root cause Operator error

  3. IL-0347 About 25% of Scaleway FR-PAR-1 hypervisors lost VPC connectivity when both VPC BGP route reflectors got stuckScaleway · 2024

    Root cause Software defect

  4. IL-0562 Most Linodes in Linode's Dallas data center had intermittent latency and reachability loss from broadcast stormsLinode · 2022

    Root cause DNS or network fault

  5. IL-0525 OpenStreetMap.org went offline for 7h 27m when its uplink switch lost power during a data-centre power feed maintenanceOpenStreetMap Foundation · 2022

    Root cause Hardware failure

  6. IL-0263 GitHub was slow and erroring all day and down for 18 minutes as links between access and aggregation switches saturatedGitHub · 2012

    Root cause Software defect

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