broker-dls.yaml

apiVersion: eventing.knative.dev/v1
kind: Broker
metadata:
 annotations:
   eventing.knative.dev/broker.class: Kafka
 name: <broker-name>
spec:
 config:
   apiVersion: v1
   kind: ConfigMap
   name: <my-broker-config-name>
 delivery:
   retry: 12
   backoffPolicy: exponential
   backoffDelay: PT0.5S # 500 milliseconds
   deadLetterSink:
     ref:
       apiVersion: eventing.knative.dev/v1
       kind: Broker
       name: <dead-letter-sink-broker-name>