Rate limiting behavior question

Hi,
I started using Rate Limiting too and I am with some trouble with it (doesn’t work). Maybe you guys could you, please, indicate if I am missing anything:
apiVersion: “config.istio.io/v1alpha2
kind: memquota
metadata:
name: handler
namespace: istio-system
spec:
quotas:
- name: requestcount.quota.istio-system
maxAmount: 1
validDuration: 60s
overrides:
- dimensions:
destination: <service_name>
maxAmount: 1
validDuration: 60s

apiVersion: “config.istio.io/v1alpha2
kind: quota
metadata:
name: requestcount
namespace: istio-system

apiVersion: config.istio.io/v1alpha2
kind: QuotaSpec
metadata:
name: request-count
namespace: istio-system
spec:
rules:
- quotas:
- charge: 1
quota: request-count

apiVersion: config.istio.io/v1alpha2
kind: QuotaSpecBinding
metadata:
name: request-count
namespace: istio-system
spec:
quotaSpecs:
- name: request-count
namespace: istio-system
services:
- name: <service_name>
namespace: <namespace_name>

apiVersion: config.istio.io/v1alpha2
kind: rule
metadata:
name: quota
namespace: istio-system
spec:
actions:
- handler: handler.memquota
instances:
- requestcount.quota

Thank you.