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  1. IL-0344 Linode's US-West data centers in Fremont and Santa Clara lost connectivity as the fibre circuits between them failed
    Linode2023
    Symptoms

    On 12 February 2023, customers in Linode's US-West region could not reach their Linodes. Santa Clara customers lost Internet connectivity after a change made at 8:45 UTC until it was reverted at 10:13 UTC, and later in the day the connection between the Fremont and Santa Clara data centers was cut completely, leaving both with degraded service or a full outage until 16:25 UTC; customers could also have trouble provisioning, powering down or rebooting services.

    Network unreachable
    Trigger

    A single link of the A-side fibre circuit between Fremont and Santa Clara went down on 11 February, the whole B-side circuit followed on 12 February, and during troubleshooting with the hardware vendor a non-intrusive command triggered a rare bug that took down all A-side links.

    Root cause
    Software defect
    Component
    Backbone network (WAN)NIC, cable and switch port link
    Contributing factor
    Overlapping failuresHarmful manual action
    Detection

    The response team began investigating when the A-side link went down on 11 February. The status page opened at 10:22 UTC on 12 February to investigate reports of connectivity issues in the US-West region.

    Remediation
    • Reverted the change that removed internet traffic from the Santa Clara border routers
    • Performed an emergency code upgrade of both circuits, restoring connectivity between the sites
    • Restored the B-side path with the hardware vendor and fiber provider, regaining full redundancy
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Check your cluster for this

This case involves Backbone network (WAN) and NIC, cable and switch port link. 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 cause1

Software defect1 case

Component
Backbone network (WAN)NIC, cable and switch port link
Contributing factor
Harmful manual actionOverlapping failures
Organisation
Linode
  1. IL-0344 Linode's US-West data centers in Fremont and Santa Clara lost connectivity as the fibre circuits between them failed
    Linode2023