Intermittent IPv6 reachability in Amsterdam (AMS1)

Affected:

Network · AMS1

Duration

21 min

Reference

inc-20250528-1

Timeline

1. Resolved28 May 2025, 20:39 UTC

   Resolved. IPv6 reachability is fully restored; the filter change process now requires a second review.

2. Monitoring28 May 2025, 20:31 UTC

   All IPv6 prefixes are back in the routing table. We are verifying reachability from every rack.

3. Identified28 May 2025, 20:23 UTC

   A route filter update dropped a set of IPv6 prefixes learned at AMS-IX. The filter has been corrected and sessions are being re-announced.

4. Investigating28 May 2025, 20:18 UTC

   Some customers report IPv6 destinations being unreachable from Amsterdam (AMS1). IPv4 is unaffected.

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