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Top-of-rack switch reboot, rack ZRH-B01

Netzwerk — Transit & Peering — ZRH

Zeitleiste

  1. Behoben

    Rack B01 has been stable since 09:51 UTC. Duration: 7 minutes. Running workloads were not interrupted; only reachability was lost. Affected machines receive the SLA extension automatically.

  2. Ursache erkannt

    The switch has reloaded and its uplinks are up. It rebooted on a software watchdog; we have the crash file and will send it to the vendor.

  3. Untersuchung läuft

    The top-of-rack switch in rack B01 of ZRH rebooted unexpectedly at 09:44 UTC. The 13 machines in that rack are unreachable while it comes back up.

Nachbesprechung des Vorfalls ·

Was passiert ist und was sich geändert hat

Ursache

The top-of-rack switch in ZRH-B01 hit a memory leak in its control-plane process that the vendor has since fixed; the watchdog reloaded the switch when the process stopped responding.

Auswirkung

13 machines were unreachable for 7 minutes. GPU workloads continued to run and no data was lost.

Was wir geändert haben

  • The fixed switch firmware was rolled out to every rack in the fleet during the following maintenance windows.
  • The watchdog now reports a warning at 80% memory use instead of only reloading at 100%, giving us time to move the rack to its backup path first.

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