Companies/Amazon Web Services/Incidents

Amazon Web Services: Elevated packet loss (eu-south-2)

Affected components: Amazon AthenaAWS IoT Device ManagementAWS IoT CoreAWS WAFBedrock AgentCoreAWS Certificate ManagerAWS CloudTrailAWS Cloud WANAmazon CognitoAWS Direct ConnectAmazon DynamoDBAmazon Elastic Compute CloudAWS Systems ManagerAmazon Elastic Container ServiceAmazon Elastic Kubernetes ServiceAmazon Elastic File SystemAmazon Elastic Load BalancingAmazon Elastic MapReduceAWS FargateAmazon FSxAWS GlueAWS NAT GatewayAWS Network FirewallAWS Parallel Computing ServiceAWS VPCE PrivateLinkAmazon RedshiftAmazon RekognitionAmazon SageMakerAWS Step FunctionsAWS Transfer FamilyAWS Transit GatewayAmazon Virtual Private Cloud

Timeline of updates

1. update2026-10-04 16:14 UTC

   We are investigating elevated packet loss in the EU-SOUTH-2 Region.

2. update2026-10-04 16:36 UTC

   We are experiencing elevated packet loss with a single Availability Zone (eus2-az1) in the EU-SOUTH-2 Region. This issue is also resulting in elevated API latencies and error rates for other workflows and AWS Services. Engineers were automatically engaged and are working to identify the root cause and to mitigate the issue. We will provide you with another update by 10:15 AM PDT or sooner as new information becomes available.

3. update2026-10-04 17:06 UTC

   Our efforts to mitigate the elevated packet loss with a single Availability Zone (eus2-az1) in the EU-SOUTH-2 Region is still underway. We are seeing some signs of improvement as a result of multiple parallel efforts. We continue to work to confirm root cause and fully mitigate the issue. While we currently do not have an estimate for how long our actions will take, we will keep you informed of our progress and provide you with another update by 11:00 AM PDT or sooner as new information becomes available.

4. update2026-10-04 17:56 UTC

   We have identified the root cause and are currently focusing our mitigation efforts to drive full recovery. While we don't have an exact estimate for how long our current efforts will take, we do expect to see incremental improvements as our efforts proceed. We will provide you with another update by 11:45 AM PDT, or sooner if new information becomes available.

5. update2026-10-04 18:45 UTC

   We are seeing early signs of recovery. We will provide you with another update by 12:00 PM PDT.

6. resolved2026-10-04 18:56 UTC

   Between 8:48 AM and 11:28 AM PDT, we experienced elevated packet loss within a single Availability Zone (eus2-az1) in the EU-SOUTH-2 Region. This issue resulted in elevated API latencies and error rates for multiple workflows and AWS Services. We were automatically alerted to the issue at 8:54 AM, and immediately began work to identify the root cause while taking multiple parallel paths to mitigate the issue. By 10:00 AM, our mitigation efforts had led to some improvements. By 10:38 AM, we identified the root cause as related to a networking configuration change that we were able to revert the change which led to full mitigation by 11:28 AM. The issue has been resolved and the service is operating normally.

Impact, status and times are the vendor’s own, as last archived. View on health.aws.amazon.com (opens in new tab).

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