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Each health event type has an associated severity to indicate the level of expected impact. This property can help with filtering logs and creating more individualized alerts based on the urgency of the issue.
@@ -40,11 +37,11 @@ Each event log is published with a timestamp that indicates the time that Azure
|**Preview**|*DataPathAvailabilityWarning*| Warning | This event is published per affected Load Balancer frontend IP, when the Data Path Availability metric of the frontend IP is less than 90% due to platform issues | 1 minute | 5 minutes | Frontend IP address, List of frontend ports associated with affected load balancing rules |
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|**Preview**|*DataPathAvailabilityCritical*| Critical | This event is published per affected Load Balancer frontend IP, when the Data Path Availability metric of the frontend IP is less than 25% due to platform issues | 1 minute | 5 minutes | Frontend IP address, List of frontend ports associated with affected load balancing rules |
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|**Preview**|*NoHealthyBackends*| Critical | This event is published per Load Balancer frontend IP, when an associated backend pool has no backend instances responding to the configured health probes. As a result, the load balancer has no healthy backends to distribute traffic to. | On-demand | 60 minutes | Frontend IP address, Pairwise list of protocol and frontend ports associated with affected load balancing rules |
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|**Preview**|*HighSnatPortUsage*| Warning | This event is published on a per backend instance-level, when a backend instance utilizes more than 75% of its allocated ports from a single frontend IP. | On-demand | 5 minutes | Backend IP address, Frontend IP address |
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|**Preview**|*SnatPortExhaustion*| Critical | This event is published on a per backend instance-level. Publication occurs when a backend instance exhausts all allocated ports and fails any further outbound connections. This event continues until ports are released or more ports are allocated. | On-demand | 5 minutes | Backend IP address, Frontend IP address |
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|**GA**|*DataPathAvailabilityWarning*| Warning | This event is published per affected Load Balancer frontend IP, when the Data Path Availability metric of the frontend IP is less than 90% due to platform issues | 1 minute | 5 minutes | Frontend IP address, List of frontend ports associated with affected load balancing rules |
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|**GA**|*DataPathAvailabilityCritical*| Critical | This event is published per affected Load Balancer frontend IP, when the Data Path Availability metric of the frontend IP is less than 25% due to platform issues | 1 minute | 5 minutes | Frontend IP address, List of frontend ports associated with affected load balancing rules |
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|**GA**|*NoHealthyBackends*| Critical | This event is published per Load Balancer frontend IP, when an associated backend pool has no backend instances responding to the configured health probes. As a result, the load balancer has no healthy backends to distribute traffic to. | On-demand | 60 minutes | Frontend IP address, Pairwise list of protocol and frontend ports associated with affected load balancing rules |
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|**GA**|*HighSnatPortUsage*| Warning | This event is published on a per backend instance-level, when a backend instance utilizes more than 75% of its allocated ports from a single frontend IP. | On-demand | 5 minutes | Backend IP address, Frontend IP address |
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|**GA**|*SnatPortExhaustion*| Critical | This event is published on a per backend instance-level. Publication occurs when a backend instance exhausts all allocated ports and fails any further outbound connections. This event continues until ports are released or more ports are allocated. | On-demand | 5 minutes | Backend IP address, Frontend IP address |
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For more information on the properties published with each health event log, refer to the Azure Log Analytics reference documentation for the log table [*ALBHealthEvent*](/azure/azure-monitor/reference/tables/albhealthevent).
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