Incident Library
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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
    View case
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