// Number of port to expose on the pod's IP address.
  // This must be a valid port number, 0 < x < 65536.
  optional int32 containerPort = 3;

  // Protocol for port. Must be UDP, TCP, or SCTP.
  // Defaults to "TCP".
  // +optional
  // +default="TCP"
  optional string protocol = 4;

  // What host IP to bind the external port to.
  // +optional
  optional string hostIP = 5;
}

- SCTP support in API objects (Pod, Service, NetworkPolicy) is now GA.
  Note that this has no effect on whether SCTP is enabled on nodes at the kernel level,

- github.com/grpc-ecosystem/grpc-gateway/v2: [v2.7.0 → v2.16.0](https://github.com/grpc-ecosystem/grpc-gateway/v2/compare/v2.7.0...v2.16.0)
- github.com/ishidawataru/sctp: [7c296d4 → 7ff4192](https://github.com/ishidawataru/sctp/compare/7c296d4...7ff4192)
- github.com/konsorten/go-windows-terminal-sequences: [v1.0.3 → v1.0.1](https://github.com/konsorten/go-windows-terminal-sequences/compare/v1.0.3...v1.0.1)

- Clarified the description of a test in the e2e suite that mentions "SCTP" but is
  actually intended to be testing the behavior of network plugins that don't
  implement SCTP. ([#102509](https://github.com/kubernetes/kubernetes/pull/102509), [@danwinship](https://github.com/danwinship))

- SCTP is now supported as an additional protocol (alpha) alongside TCP and UDP in Pod, Service, Endpoint, and NetworkPolicy.  ([#64973](https://github.com/kubernetes/kubernetes/pull/64973), [@janosi](https://github.com/janosi)) Courtesy of SIG API Machinery,...

- Reduce kube-proxy CPU usage in IPVS mode when a large number of nodePort services exist. ([#79444](https://github.com/kubernetes/kubernetes/pull/79444), [@cezarsa](https://github.com/cezarsa))
- Fix in kube-proxy for SCTP nodeport service which only works for node's InternalIP, but doesn't work for other IPs present in the node when ipvs is enabled. ([#81477](https://github.com/kubernetes/kubernetes/pull/81477), [@paulsubrata55](https://github.com/paulsubrata55))

- Fixed client IP preservation for NodePort service with protocol SCTP in ipvs. ([#104756](https://github.com/kubernetes/kubernetes/pull/104756), [@tnqn](https://github.com/tnqn))