Enable zonal shift for your Network Load Balancer

Zonal shift is disabled by default and must be enabled on each Network Load Balancer. This ensures that you can start a zonal shift using only the specific Network Load Balancers that you want. For more information, see Zonal shift for your Network Load Balancer.

Prerequisites

If you enable cross-zone load balancing for the load balancer, every target group attached to the load balancer must meet the following requirements before you can enable zonal shift.

• The target group protocol must be TCP or TLS.

• The target group type must not be alb.

• Connection termination for unhealthy targets must be disabled.

• The load_balancing.cross_zone.enabled target group attribute must be true or use_load_balancer_configuration (the default).

Console

To enable zonal shift

1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.

2. On the navigation pane, under Load Balancing, choose Load Balancers.

3. Select the Network Load Balancer.

4. On the Attributes tab, choose Edit.

5. Under Availability Zone routing configuration, for ARC zonal shift integration, choose Enable.

6. Choose Save changes.

AWS CLI

To enable zonal shift

Use the modify-load-balancer-attributes command with the zonal_shift.config.enabled attribute.

aws elbv2 modify-load-balancer-attributes \
    --load-balancer-arn load-balancer-arn \
    --attributes "Key=zonal_shift.config.enabled,Value=true"

CloudFormation

To enable zonal shift

Update the AWS::ElasticLoadBalancingV2::LoadBalancer resource to include the zonal_shift.config.enabled attribute.

Resources:
  myLoadBalancer:
    Type: 'AWS::ElasticLoadBalancingV2::LoadBalancer'
    Properties:
      Name: my-nlb
      Type: network
      Scheme: internal
      Subnets: 
        - !Ref subnet-AZ1
        - !Ref subnet-AZ2
      SecurityGroups: 
        - !Ref mySecurityGroup
      LoadBalancerAttributes:
        -Key: "zonal_shift.config.enabled"
         Value: "true"