**To associate a security group with a load balancer**
This example associates the specified security group with the specified load balancer.
Command::
aws elbv2 set-security-groups --load-balancer-arn arn:aws:elasticloadbalancing:us-west-2:123456789012:loadbalancer/app/my-load-balancer/50dc6c495c0c9188 --security-groups sg-5943793c
Output::
{
"SecurityGroupIds": [
"sg-5943793c"
]
}