Packet loss on the Cogent uplink in AMS
Network — transit & peering — AMS
Timeline
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Resolved
The Cogent uplink in AMS has been clean for 5 minutes with the session restored. Total duration of the degradation: 26 minutes. No machine lost connectivity; some traffic saw higher latency during the detour.
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Monitoring
Cogent reports the card replaced. We have re-enabled the session and are watching error counters before calling this resolved.
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Identified
Cogent has confirmed a faulty line card on their side of the AMS handover. We have withdrawn our prefixes from that session, and all traffic is leaving through Lumen and AMS-IX for now. Loss has cleared; latency to some destinations is 3–6 ms higher while the detour is in place.
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Investigating
We are investigating packet loss of around 9% towards a subset of destinations from AMS. Alerts fired at 19:03 UTC on the Cogent uplink; the Lumen uplink and the AMS-IX peering are clean. Machines remain reachable.
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Related pages
- Service statusLive status of every gpuserver.io component and data centre, probed every 60 seconds from five cities, with 90-day uptime and the incident log since 2022.
- Incident historyEvery incident and maintenance window on gpuserver.io since monitoring began in September 2022, month by month, with its timeline and post-incident review.
- Service level agreementThe 99.9% commitment: what counts as downtime, how it is measured from outside, five minutes of term back per minute lost, and the exclusions in full.
- NetworkUnmetered ports up to 25 Gbit/s, two carriers and an IX per site, always-on DDoS filtering, routed IPv6 — and the four things we do not offer, stated up front.