Customers may have experienced brief performance issues if they were using the data centers US-MIA (Miami) and IT-MIL (Milan) on September 14, 2025, between 17:42 UTC and 18:43 UTC or data center BR-GRU (Sao Paulo) on September 15, 2025 between 01:44 UTC and 04:22 UTC by packet loss. Impact would vary depending on the nature of what products/services customers were connected to during those times, but in the majority of the cases, customers observed performance degradation.
The issue was triggered when routing thresholds between our core router and edge router exceeded the maximum number of permitted prefixes.. When these limits were reached, the traffic from the Datacenters shifted to alternate paths, which resulted in network congestion and subsequently led to the observed packet loss. The issue was then initiated by a gradual increase that triggered this safety limit. We have not identified any ISP issues which may have contributed to this situation.
In order to mitigate the issue, Akamai has increased the prefix limit on all the Datacenter Routers.
To prevent a recurrence, Akamai will:
This summary provides an overview of our current understanding of the incident given the information available. Our investigation is ongoing and any information herein is subject to change.