Unannounced maintenance by Cogent affecting ZRH

时间线

1. 已解决2025年4月27日 01:13 UTC

   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.

2. 观察中2025年4月27日 01:07 UTC

   Cogent reports the work complete. We have re-enabled the session and are watching it.

3. 已确定原因2025年4月27日 00:51 UTC

   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.

4. 调查中2025年4月27日 00:38 UTC

   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.