- Kube-proxy, when using a Service with External or LoadBalancer IPs on UDP services , was consuming a large amount of CPU because it was not filtering by the Service destination port and trying to delete all the UDP entries associated to the service. ([#130505](https://github.com/kubernetes/kubernetes/pull/130505), [@aojea](https://github.com/aojea)) [SIG Network]

- Graduated the `DisableNodeKubeProxyVersion` feature gate to enable by default, the kubelet no longer attempts to set the `.status.kubeProxyVersion` field for its associated Node. ([#129713](https://github.com/kubernetes/kubernetes/pull/129713), [@HirazawaUi](https://github.com/HirazawaUi)) [SIG Node]

  This is achieved by reducing the TIME-WAIT state of the connection to 1 second, instead of the defaults 60 seconds. This allows kubelet to free the socket, and free conntrack entry and ephemeral port associated. ([#115143](https://github.com/kubernetes/kubernetes/pull/115143), [@aojea](https://github.com/aojea)) [SIG Network and Node]

Renamed FeatureGate RequestManagement to APIPriorityAndFairness.  This feature gate is an alpha and has not yet been associated with any actual functionality. ([#85260](https://github.com/kubernetes/kubernetes/pull/85260), [@MikeSpreitzer](https://github.com/MikeSpreitzer))

The `IngressClass` resource is used to describe a type of Ingress within a Kubernetes cluster. Ingresses can specify the class they are associated with by using a new `ingressClassName` field on Ingresses. This new resource and field replace the deprecated `kubernetes.io/ingress.class` annotation.

### SIG CLI introduces kubectl debug

  of the connection to 1 second, instead of the defaults 60 seconds. This allows
  kubelet to free the socket, and free conntrack entry and ephemeral port associated. ([#115143](https://github.com/kubernetes/kubernetes/pull/115143), [@aojea](https://github.com/aojea))

- Graduated the `DisableNodeKubeProxyVersion` feature gate to beta. By default, the kubelet no longer attempts to set the `.status.kubeProxyVersion` field for its associated Node. ([#123845](https://github.com/kubernetes/kubernetes/pull/123845), [@HirazawaUi](https://github.com/HirazawaUi)) [SIG API Machinery, Cloud Provider, Network, Node and Testing]

  This is achieved by reducing the TIME-WAIT state of the connection to 1 second, instead of the defaults 60 seconds. This allows kubelet to free the socket, and free conntrack entry and ephemeral port associated. ([#115143](https://github.com/kubernetes/kubernetes/pull/115143), [@aojea](https://github.com/aojea)) [SIG Network and Node]

* The rknetes code, which was deprecated in 1.10, has been removed. Use rktlet and CRI instead. ([#61432](https://github.com/kubernetes/kubernetes/pull/61432), [@filbranden](https://github.com/filbranden))

- The following features are now GA, and the associated feature gates are deprecated and will be removed in v1.15:
  - `CustomPodDNS`
  - `HugePages`
  - `MountPropagation`
  - `PersistentLocalVolumes`