Documentation forSolarWinds Observability SaaS

Network Elastic Load Balancing (ELB) metrics

Amazon Elastic Load Balancing automatically distributes your incoming traffic across multiple targets, such as EC2 instances, containers, and IP addresses, in one or more Availability Zones. Ensure your cloud platform is configured in SolarWinds Observability SaaS to collect this service's data. See Add an AWS cloud account. CloudWatch metrics must also be enabled for this service in the AWS Console for the metric data to be available.

Many of the collected metrics from Network ELB entities are displayed as widgets in SolarWinds Observability explorers; additional metrics may be collected and available in the Metrics Explorer. You can also create an alert for when an entity's metric value moves out of a specific range. See Entities in SolarWinds Observability SaaS for information about entity types in SolarWinds Observability SaaS.

The following table lists some of the metrics collected for these entities. To see the Network ELB metrics in the Metrics Explorer, type AWS.NetworkELB in the search box.

Metric Units Description
sw.metrics.healthscore Percent (%)

Health score. A health score provides real-time insight into the overall health and performance of your monitored entities. The health score is calculated based on anomalies detected for the entity, alerts triggered for the entity's metrics, and the status of the entity. The health score is displayed as a single numerical value that ranges from a Good (70-100) to Moderate (40-69) to Bad (0-39) distinction.

To view the health score for Network ELB entities in the Metrics Explorer, filter the sw.metrics.healthscore metric by entity_types and select awsnetworkelb.
AWS.NetworkELB.ActiveFlowCount Count

The total number of concurrent flows (or connections) from clients to targets. This metric includes connections in the SYN_SENT and ESTABLISHED states. TCP connections are not terminated at the load balancer, so a client opening a TCP connection to a target counts as a single flow.
AWS.NetworkELB.ActiveFlowCount_TCP Count

The total number of concurrent TCP flows (or connections) from clients to targets. This metric includes connections in the SYN_SENT and ESTABLISHED state. TCP connections are not terminated at the load balancer, so a client opening a TCP connection to a target counts as a single flow.
AWS.NetworkELB.ActiveFlowCount_TLS Count The total number of concurrent TLS flows (or connections) from clients to targets. This metric includes connections in the SYN_SENT and ESTABLISHED state.
AWS.NetworkELB.ActiveFlowCount_UDP Count The total number of concurrent UDP flows (or connections) from clients to targets.
AWS.NetworkELB.ClientTLSNegotiationErrorCount Count The total number of TLS handshakes that failed during negotiation between a client and a TLS listener.
AWS.NetworkELB.ConsumedLCUs Count

The number of load balancer capacity units (LCU) used by your load balancer. You pay for the number of LCUs that you use per hour. For more information, see Elastic Load Balancing Pricing.
AWS.NetworkELB.ConsumedLCUs_TCP Count

The number of load balancer capacity units (LCU) used by your load balancer for TCP. You pay for the number of LCUs that you use per hour. For more information, see Elastic Load Balancing Pricing.
AWS.NetworkELB.ConsumedLCUs_TLS Count The number of load balancer capacity units (LCU) used by your load balancer for TLS. You pay for the number of LCUs that you use per hour. For more information, see Elastic Load Balancing Pricing.
AWS.NetworkELB.ConsumedLCUs_UDP Count The number of load balancer capacity units (LCU) used by your load balancer for UDP. You pay for the number of LCUs that you use per hour. For more information, see Elastic Load Balancing Pricing.
AWS.NetworkELB.HealthyHostCount Count

The number of targets that are considered healthy. This metric does not include any Application Load Balancers registered as targets.
AWS.NetworkELB.NewFlowCount Count

The total number of new flows (or connections) established from clients to targets in the time period.
AWS.NetworkELB.NewFlowCount_TCP Count

The total number of new TCP flows (or connections) established from clients to targets in the time period.
AWS.NetworkELB.NewFlowCount_TLS Count The total number of new TLS flows (or connections) established from clients to targets in the time period.
AWS.NetworkELB.NewFlowCount_UDP Count The total number of new UDP flows (or connections) established from clients to targets in the time period.
AWS.NetworkELB.PeakPacketsPerSecond Count per second

Highest average packet rate (packets processed per second), calculated every 10 seconds during the sampling window. This metric includes health check traffic.
AWS.NetworkELB.PortAllocationErrorCount Count

The total number of ephemeral port allocation errors during a client IP translation operation. A non-zero value indicates dropped client connections.

Network Load Balancers support 55,000 simultaneous connections or about 55,000 connections per minute to each unique target (IP address and port) when performing client address translation. To fix port allocation errors, add more targets to the target group.
AWS.NetworkELB.ProcessedBytes bytes

The total number of bytes processed by the load balancer, including TCP/IP headers. This count includes traffic to and from targets, minus health check traffic.
AWS.NetworkELB.ProcessedBytes_TCP bytes

The total number of bytes processed by TCP listeners.
AWS.NetworkELB.ProcessedBytes_TLS bytes The total number of bytes processed by TLS listeners.
AWS.NetworkELB.ProcessedBytes_UDP bytes The total number of bytes processed by UDP listeners.
AWS.NetworkELB.ProcessedPackets Count

The total number of packets processed by the load balancer. This count includes traffic to and from targets, including health check traffic.

AWS.NetworkELB.RejectedFlowCount Count

The number of network flows rejected by the Network Load Balancer due to security group rules or other policies.
AWS.NetworkELB.SecurityGroupBlockedFlowCount_Inbound_ICMP Count The number of new ICMP messages rejected by the inbound rules of the load balancer security groups.
AWS.NetworkELB.SecurityGroupBlockedFlowCount_Inbound_TCP Count

The number of new TCP flows rejected by the inbound rules of the load balancer security groups.

AWS.NetworkELB.SecurityGroupBlockedFlowCount_Inbound_UDP Count The number of new UDP flows rejected by the inbound rules of the load balancer security groups.
AWS.NetworkELB.SecurityGroupBlockedFlowCount_Outbound_ICMP Count The number of new ICMP messages rejected by the outbound rules of the load balancer security groups.
AWS.NetworkELB.SecurityGroupBlockedFlowCount_Outbound_TCP Count The number of new TCP flows rejected by the outbound rules of the load balancer security groups.
AWS.NetworkELB.SecurityGroupBlockedFlowCount_Outbound_UDP Count The number of new UDP flows rejected by the outbound rules of the load balancer security groups.
AWS.NetworkELB.TargetTLSNegotiationErrorCount Count The total number of TLS handshakes that failed during negotiation between a TLS listener and a target.
AWS.NetworkELB.TCP_Client_Reset_Count Count

The total number of reset (RST) packets sent from a client to a target. These resets are generated by the client and forwarded by the load balancer.
AWS.NetworkELB.TCP_ELB_Reset_Count Count

The total number of reset (RST) packets generated by the load balancer. For more information, see Troubleshooting.
AWS.NetworkELB.TCP_Target_Reset_Count Count

The total number of reset (RST) packets sent from a target to a client. These resets are generated by the target and forwarded by the load balancer.

AWS.NetworkELB.UnHealthyHostCount Count The number of targets that are considered unhealthy. This metric does not include any Application Load Balancers registered as targets. Reporting criteria: Reported if health checks are enabled.
AWS.NetworkELB.UnhealthyRoutingFlowCount Count The number of flows (or connections) that are routed using the routing failover action (fail open).
AWS.NetworkELB.ZonalHealthStatus Status Indicator Represents the health status of a Network Load Balancer in each availability zone, helping to identify failover events and potential issues.