**To enable Availability Zones for a load balancer** This example enables the Availability Zone for the specified subnet for the specified load balancer. Command:: aws elbv2 set-subnets --load-balancer-arn arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188 --subnets subnet-8360a9e7 subnet-b7d581c0 Output:: { "AvailabilityZones": [ { "SubnetId": "subnet-8360a9e7", "ZoneName": "us-west-2a" }, { "SubnetId": "subnet-b7d581c0", "ZoneName": "us-west-2b" } ] }