Incident Library
Applied filters ComponentNetwork switchSymptomNetwork unreachableFactorExcessive blast radiusClear allEvery case under the filters, with no sentence; newest first.
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Cases2 cases

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  1. IL-0349 IONOS Private Cloud in Berlin lost management access, storage and VM internet routing after a VLAN change
    IONOS Cloud2026
    Symptoms

    On 15 January 2026, network services for VMware-based Private Clouds in IONOS Cloud's Berlin location stopped working: customers lost management VPN access and traffic to and from their virtual machines. Inside IONOS, several management interfaces in the Berlin region could no longer be reached.

    Network unreachableStorage disconnected or stale mounts
    Trigger

    During a planned maintenance window to add a new VLAN to the management devices, a human error in the command replaced the existing VLANs on the trunk between the core and management devices instead of adding to them, so only the new VLAN stayed active.

    Root cause
    Operator error
    Component
    Network switchTransit gateway or network interconnect
    Contributing factor
    Excessive blast radiusNo safeguard on destructive change
    Remediation
    • Restarted the affected storage services in the final stage of recovery, which caused a brief second outage
    Action items
    • Audit the management device architecture to segment it better (target Q3 2026)
    • Evaluate and implement ways to prevent unintended VLAN changes, such as improved configuration safeguards or automation scripts (target Q1 2026)
    View case
  2. IL-0347 About 25% of Scaleway FR-PAR-1 hypervisors lost VPC connectivity when both VPC BGP route reflectors got stuck
    Scaleway2024
    Symptoms

    On 18 October 2024, from 7:50 to 8:01 UTC, about 25% of the hypervisors in Scaleway's FR-PAR-1 availability zone lost VPC connectivity with the rest of the region, and products that use VPC failed with them. Public internet connectivity and Elastic Metal VPC connectivity were not affected.

    Network unreachablePacket lossNode NotReady
    Trigger

    At 6:20 UTC a Top of Rack switch in FR-PAR-1 had a software crash. One of the two BGP route reflectors for VPC ran on a hypervisor in that rack and was left in an abnormal state.

    Root cause
    Software defect
    Component
    Network control plane (SDN)BGP routingNetwork switchDatabaseManaged Kubernetes control plane and provider API
    Contributing factor
    Excessive blast radiusAutomation amplification
    Detection

    Health-check monitoring on both route reflectors detected the anomaly, and the Scaleway Customer Excellence and SRE teams detected the customer impact and opened an incident.

    Remediation
    • Fixed both VPC route reflectors by manual action
    Action items
    • Fixed the autohealing mechanism that had failed to fix route reflectors stuck in a stale state; the fix is https://github.com/FRRouting/frr/pull/17163
    • Run different software versions on the route reflectors so a single bug cannot stop several instances
    • Investigate the software issue that left the route reflectors in a stale state
    View case
Check your cluster for this

These 2 cases involve Network switch and BGP routing. kubegap audits a Kubernetes cluster for gaps like these, read-only, from Claude Code or Codex; its checks cite public reports like the ones in this library.

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By root cause2

Operator error1 case

Component
Transit gateway or network interconnectNetwork switch
Contributing factor
Excessive blast radiusNo safeguard on destructive change
Organisation
IONOS Cloud
  1. IL-0349 IONOS Private Cloud in Berlin lost management access, storage and VM internet routing after a VLAN change
    IONOS Cloud2026

Software defect1 case

Component
BGP routingDatabaseManaged Kubernetes control plane and provider APINetwork control plane (SDN)Network switch
Contributing factor
Automation amplificationExcessive blast radius
Organisation
Scaleway
  1. IL-0347 About 25% of Scaleway FR-PAR-1 hypervisors lost VPC connectivity when both VPC BGP route reflectors got stuck
    Scaleway2024