---
title: Windows Machine Config Operator known limitations
---

# Windows Machine Config Operator known limitations {#windows-containers-release-notes-limitations}

Note the following limitations when working with Windows nodes managed by the WMCO (Windows nodes):

- The following OpenShift Container Platform features are not supported on Windows nodes:

  - Image builds
  - OpenShift Pipelines
  - OpenShift Service Mesh
  - OpenShift monitoring of user-defined projects
  - OpenShift Serverless
  - Vertical Pod Autoscaling
  - Hosted Control Planes
- The following Red Hat features are not supported on Windows nodes:

  - [Red Hat Lightspeed cost management](https://docs.redhat.com/en/documentation/cost_management_service/1-latest)
  - [Red Hat OpenShift Local](https://developers.redhat.com/products/openshift-local/overview)
- Dual NIC is not supported on WMCO-managed Windows instances.
- Windows nodes do not support workloads created by using deployment configs. You can use a deployment or other method to deploy workloads.
- Red Hat OpenShift support for Windows Containers does not support adding Windows nodes to a cluster through a trunk port. The only supported networking configuration for adding Windows nodes is through an access port that carries traffic for the VLAN.
- Red Hat OpenShift support for Windows Containers does not support any Windows operating system language other than English (United States).
- Due to a limitation within the Windows operating system, `clusterNetwork` CIDR addresses of class E, such as `240.0.0.0`, are not compatible with Windows nodes.
- Kubernetes has identified the following node feature limitations. For more information, see "Compatibility and limitations (Kubernetes documenation)".

  - Huge pages are not supported for Windows containers.
  - Privileged containers are not supported for Windows containers.
- Kubernetes has identified several API compatibility issues. For more information, see "API compatibility (Kubernetes documenation)".

**Additional resources**
{._additional-resources}

- [Red Hat Lightspeed cost management](https://docs.redhat.com/en/documentation/cost_management_service/1-latest)
- [Red Hat OpenShift Local](https://developers.redhat.com/products/openshift-local/overview)
- [Compatibility and limitations (Kubernetes documenation)](https://kubernetes.io/docs/concepts/windows/intro/#limitations)
- [API compatibility (Kubernetes documenation)](https://kubernetes.io/docs/concepts/windows/intro/#api)