IPv6 reachability from ZRH degraded

时间线

1. 已解决2025年6月3日 19:47 UTC

   IPv6 from ZRH has been fully reachable for 15 minutes. Duration: 18 minutes. IPv4 traffic was never affected.

2. 已确定原因2025年6月3日 19:34 UTC

   Cogent is not propagating our IPv6 announcement beyond their network after a policy change on their side. We have moved IPv6 outbound to Init7, which is announcing us globally.

3. 调查中2025年6月3日 19:30 UTC

   Some IPv6 destinations are unreachable from ZRH since 19:29 UTC. IPv4 is unaffected. Our own external probes over IPv6 from Iberia fail; the other probe locations succeed.