Backend-protocol version to HTTP2/GRPC not working with istio ingress backend for ALB.

[anannaya]

Describe the bug
Backend-protocol version to HTTP2/GRPC not working with istio ingress backend for ALB.

Steps to reproduce
Add the annotation to ingress object : alb.ingress.kubernetes.io/backend-protocol-version: HTTP2
Expected outcome
Protocol version should change in istio ingress bakend pods in target groups.
Environment
EKS

• AWS Load Balancer controller version ; 2.5.3
• Kubernetes version 1.27
• Using EKS (yes/no), if so version?
  Yes. v1.27.9-eks-5e0fdde
  Additional Context:

[ChuksGrinage]

Thanks for bringing this to our attention. Could you provide us with your logs and configuration manifest? /kind/bug

[anannaya]

I don't know its a issue or not. But the problem is Ingress annotaion does not overwrite the k8s Service annotation, So my case i had to manually edit the service to make it work.