**To describe the health of the instances for a load balancer** This example describes the health of the instances for the specified load balancer. Command:: aws elb describe-instance-health --load-balancer-name my-load-balancer Output:: { "InstanceStates": [ { "InstanceId": "i-207d9717", "ReasonCode": "N/A", "State": "InService", "Description": "N/A" }, { "InstanceId": "i-afefb49b", "ReasonCode": "N/A", "State": "InService", "Description": "N/A" } ] } **To describe the health of an instance for a load balancer** This example describes the health of the specified instance for the specified load balancer. Command:: aws elb describe-instance-health --load-balancer-name my-load-balancer --instances i-7299c809 The following is an example response for an instance that is registering. Output:: { "InstanceStates": [ { "InstanceId": "i-7299c809", "ReasonCode": "ELB", "State": "OutOfService", "Description": "Instance registration is still in progress." } ] } The following is an example response for an unhealthy instance. Output:: { "InstanceStates": [ { "InstanceId": "i-7299c809", "ReasonCode": "Instance", "State": "OutOfService", "Description": "Instance has failed at least the UnhealthyThreshold number of health checks consecutively." } ] }