Outage in Microsoft Azure

Networking Issues - West Europe - Mitigated

Resolved Minor
June 15, 2023 - Started over 2 years ago - Lasted about 6 hours

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Outage Details

Impact Statement: Between 02:34 UTC and 07:25 UTC on 16 June 2023, we identified a networking issue in West Europe region. Networking traffic to and from West Europe may have been affected and resources hosted in this region may have experienced availability failures, low throughput, or increased latencies. Preliminary Root Cause: We identified that network automation systems incorrectly determined that network links in West Europe region were not working properly and shut down the links. Regions are built with extensive redundancy, however enough links were taken out of service to cause congestion and impact to customer traffic. Mitigation: Engineers placed the links back into service and ensured that the network automation would not remove them again. The network recovered after the links were restored, and other services dependent on the network recovered shortly thereafter. Next Steps: We will continue to investigate to establish the full root cause and prevent future occurrences. Stay informed about Azure service issues by creating custom service health alerts: https://aka.ms/ash-videos for video tutorials and https://aka.ms/ash-alerts for how-to documentation
Components affected
Microsoft Azure Azure HPC Cache Microsoft Azure App Service Microsoft Azure Azure Database for MySQL Microsoft Azure Cloud Services Microsoft Azure Azure Spring Cloud Microsoft Azure Azure VMware Solution Microsoft Azure Azure Cognitive Search Microsoft Azure Azure Red Hat OpenShift Microsoft Azure Azure Container Apps Microsoft Azure Azure Cosmos DB Microsoft Azure Azure Quantum Microsoft Azure App Configuration Microsoft Azure Virtual Network Microsoft Azure Azure NetApp Files Microsoft Azure Azure Database for PostgreSQL Microsoft Azure Azure SQL Database Microsoft Azure Azure Cache for Redis Microsoft Azure App Service (Linux) Microsoft Azure Service Fabric Microsoft Azure Azure Database for MySQL flexible servers Microsoft Azure Azure Database for MariaDB Microsoft Azure API Management Microsoft Azure Azure functions Microsoft Azure Virtual Machine Scale Sets Microsoft Azure Azure Database for PostgreSQL flexible servers Microsoft Azure Azure Data Share Microsoft Azure Web Apps Linux Microsoft Azure SQL Server Stretch Database Microsoft Azure Azure Databricks Microsoft Azure Azure Data Explorer Microsoft Azure Key Vault Microsoft Azure Virtual Machines Microsoft Azure SAP HANA on Azure Large Instances Microsoft Azure BareMetal Infrastructure Microsoft Azure Microsoft Purview Microsoft Azure Health Bot Microsoft Azure Azure Machine Learning Microsoft Azure Machine Learning Studio (classic) Microsoft Azure Azure Cognitive Services Microsoft Azure Custom Vision Microsoft Azure Language Understanding (LUIS) Microsoft Azure Personaliser Microsoft Azure QnA Maker Microsoft Azure Speech services Microsoft Azure Azure Private Link Microsoft Azure Web Application Firewall Microsoft Azure StorSimple Microsoft Azure Load Balancer Microsoft Azure ExpressRoute Circuits Microsoft Azure ExpressRoute Gateways Microsoft Azure Azure Firewall Microsoft Azure Virtual WAN Microsoft Azure Azure Route Server Microsoft Azure Azure VNet NAT Microsoft Azure Storage Accounts Microsoft Azure Attestation Microsoft Azure Azure confidential ledger Microsoft Azure Azure DevTest Labs Microsoft Azure Text Analytics Microsoft Azure Microsoft Genomics Microsoft Azure Azure Applied AI Services Microsoft Azure Azure Key Vault Managed HSM Microsoft Azure Azure DDoS Protection Microsoft Azure Azure Dedicated HSM Microsoft Azure Azure Firewall Manager Microsoft Azure Azure Load Testing Microsoft Azure Azure Managed Grafana Microsoft Azure Azure Backup Microsoft Azure AutoScale Microsoft Azure Application Insights Microsoft Azure Log Analytics Microsoft Azure Azure Site Recovery Microsoft Azure Automation Microsoft Azure Azure Chaos Studio Microsoft Azure Azure Automanage Microsoft Azure Media Services Microsoft Azure Azure Database Migration Service Microsoft Azure Batch Microsoft Azure VPN Gateway Microsoft Azure Network Watcher Microsoft Azure West Europe Microsoft Azure Network Infrastructure Microsoft Azure Azure Immersive Reader Microsoft Azure Azure Metrics Advisor Microsoft Azure Azure Video Indexer Microsoft Azure Azure IoT Hub Microsoft Azure IoT Hub Device Provisioning Service Microsoft Azure Azure Time Series Insights Microsoft Azure Event Grid Microsoft Azure Logic Apps Microsoft Azure Azure IoT Central Microsoft Azure Azure Digital Twins Microsoft Azure Service Bus Microsoft Azure Azure Health Data Services Microsoft Azure Azure API for FHIR Microsoft Azure Azure Active Directory Domain Services Microsoft Azure Scheduler Microsoft Azure Azure SignalR Service Microsoft Azure Azure web PubSub Microsoft Azure Azure Fluid Relay Microsoft Azure Notification Hubs Microsoft Azure Azure Container Service Microsoft Azure Container Instances Microsoft Azure Container Registry Microsoft Azure Azure Kubernetes Service (AKS) Microsoft Azure Azure Dev Spaces Microsoft Azure Computer Vision Microsoft Azure Content moderator Microsoft Azure Face API Microsoft Azure Application Gateway Microsoft Azure Azure Managed Instance for Apache Cassandra Microsoft Azure Azure Synapse Analytics Microsoft Azure HDInsight Microsoft Azure Azure Data Factory Microsoft Azure Azure Stream Analytics Microsoft Azure Data Lake Analytics Microsoft Azure Event Hubs Microsoft Azure Azure Analysis Services Microsoft Azure Data Catalogue Microsoft Azure Azure Data Lake Storage Gen1 Microsoft Azure Azure SQL Migration extension for Azure Data Studio powered by Azure Database Migration Service Microsoft Azure Spatial Anchors Microsoft Azure Remote Rendering Microsoft Azure Azure Arc-enabled servers Microsoft Azure Azure Arc enabled Kubernetes Microsoft Azure Azure Arc-enabled data services

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