Unannounced maintenance by Cogent affecting ZRH
Network — transit & peering — ZRH
Timeline
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Resolved
Full redundancy restored at 01:13 UTC. Duration: 39 minutes. No connectivity was lost; we have asked Cogent for the notification that should have preceded this work.
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Monitoring
Cogent reports the work complete. We have re-enabled the session and are watching it.
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Identified
Cogent confirms unannounced maintenance on the aggregation router that terminates our circuit. The flapping will continue until their work finishes; we have shut the session so that traffic stays stable on the other paths.
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Investigating
The Cogent uplink in ZRH has been flapping since 00:34 UTC. Traffic is on Init7 and SwissIX. We have opened a ticket with Cogent.
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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.