Core switch line-card failure in ZRH, row C

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1. 解決済み2025/03/16 7:12 UTC

   Every machine in row C has been reachable since 07:12 UTC. Duration of the outage: 50 minutes. The failed card is being replaced under an existing maintenance window; the replacement does not require another interruption. Affected machines receive the SLA extension automatically.

2. 監視中2025/03/16 6:58 UTC

   All 13 affected ports are up on the surviving card. We are checking each machine individually before closing this.

3. 原因特定2025/03/16 6:42 UTC

   A line card in one of the two core switches in ZRH failed. Row C was dual-homed, but the failover on 13 ports did not complete because the standby links were still training. We are forcing those ports over to the surviving card.

4. 調査中2025/03/16 6:28 UTC

   Machines in row C of ZRH lost network connectivity at 06:22 UTC. Rows outside C are unaffected. Engineers are on the floor.

事後レビューは、解決から5日以内にここに公開されます。