Use DescribeListeners with a CLI

To describe a listener

This example describes the specified listener.

Command:

aws elbv2 describe-listeners --listener-arns arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2

Output:

{
  "Listeners": [
      {
          "Port": 80,
          "Protocol": "HTTP",
          "DefaultActions": [
              {
                  "TargetGroupArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067",
                  "Type": "forward"
              }
          ],
          "LoadBalancerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188",
          "ListenerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2"
      }
  ]
}

To describe the listeners for a load balancer

This example describe the listeners for the specified load balancer.

Command:

aws elbv2 describe-listeners --load-balancer-arn arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188

Output:

{
  "Listeners": [
      {
          "Port": 443,
          "Protocol": "HTTPS",
          "DefaultActions": [
              {
                  "TargetGroupArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067",
                  "Type": "forward"
              }
          ],
          "SslPolicy": "ELBSecurityPolicy-2015-05",
          "Certificates": [
              {
                  "CertificateArn": "arn:aws:iam::123456789012:server-certificate/my-server-cert"
              }
          ],
          "LoadBalancerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188",
          "ListenerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/0467ef3c8400ae65"
      },
      {
          "Port": 80,
          "Protocol": "HTTP",
          "DefaultActions": [
              {
                  "TargetGroupArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:targetgroup/my-targets/73e2d6bc24d8a067",
                  "Type": "forward"
              }
          ],
          "LoadBalancerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188",
          "ListenerArn": "arn:aws:elasticloadbalancing:us-west-2:123456789012:listener/app/my-load-balancer/50dc6c495c0c9188/f2f7dc8efc522ab2"
      }
  ]
}

Example 1: This examples describes listeners of the specified ALB/NLB.

Get-ELB2Listener -LoadBalancerArn 'arn:aws:elasticloadbalancing:us-east-1:123456789012:loadbalancer/app/test-alb/3651b4394dd9a24f'

Output:

Certificates    : {}
DefaultActions  : {Amazon.ElasticLoadBalancingV2.Model.Action}
ListenerArn     : arn:aws:elasticloadbalancing:us-east-1:123456789012:listener/app/test-alb/3651b4394dd9a24f/1dac07c21187d41e
LoadBalancerArn : arn:aws:elasticloadbalancing:us-east-1:123456789012:loadbalancer/app/test-alb/3651b4394dd9a24f
Port            : 80
Protocol        : HTTP
SslPolicy       : 

Certificates    : {Amazon.ElasticLoadBalancingV2.Model.Certificate}
DefaultActions  : {Amazon.ElasticLoadBalancingV2.Model.Action}
ListenerArn     : arn:aws:elasticloadbalancing:us-east-1:123456789012:listener/app/test-alb/3651b4394dd9a24f/66e10e3aaf5b6d9b
LoadBalancerArn : arn:aws:elasticloadbalancing:us-east-1:123456789012:loadbalancer/app/test-alb/3651b4394dd9a24f
Port            : 443
Protocol        : HTTPS
SslPolicy       : ELBSecurityPolicy-2016-08