BGP session instability with Arelion in AMS

时间线

1. 已解决2025年12月15日 04:04 UTC

   Stable since 04:04 UTC. Outbound traffic is back on its normal paths. Duration: 23 minutes. Impact was limited to brief latency spikes on some routes; no session to a machine was reset.

2. 已确定原因2025年12月15日 03:50 UTC

   The resets coincide with a route-refresh storm on the Arelion side. We have applied dampening on our end and shifted outbound traffic to Lumen while Arelion investigates.

3. 调查中2025年12月15日 03:42 UTC

   The BGP session with Arelion in AMS has reset 8 times since 03:41 UTC. Each reset causes a few seconds of reconvergence for traffic that prefers that path. We are looking at our side of the session first.