---
title: Removing an additional network
---

# Removing an additional network {#remove-additional-network}

To clean up unused network configurations or free up network resources in OpenShift Container Platform, you can remove an additional network attachment. Delete the `NetworkAttachmentDefinition` custom resource to remove the secondary network from your cluster.

## Removing a secondary NetworkAttachmentDefinition custom resource {#nw-multus-delete-network_remove-additional-network}

To clean up unused network configurations or free up network resources in OpenShift Container Platform, you can remove a secondary `NetworkAttachmentDefinition` CR. Edit the Cluster Network Operator CR and delete the `NetworkAttachmentDefinition` CR to remove the secondary network from your cluster.

When a secondary network is removed from the cluster, it is not removed from any pods that it is attached to.

**Prerequisites**

- Install the OpenShift CLI (`oc`).
- Log in as a user with `cluster-admin` privileges.

**Procedure**

1. Edit the Cluster Network Operator (CNO) in your default text editor by running the following command:

   ```terminal
   $ oc edit networks.operator.openshift.io cluster
   ```
2. Modify the custom resource (CR) by removing the configuration that the CNO created from the `additionalNetworks` collection for the secondary network that you want to remove.

   ```yaml
   apiVersion: operator.openshift.io/v1
   kind: Network
   metadata:
     name: cluster
   spec:
     additionalNetworks: []
   ```

   where:

   `spec.additionalNetworks`
   :   Specifies the secondary network attachment definition that you want to remove from the `additionalNetworks` collection. If you are removing the configuration mapping for the only secondary network attachment definition in the `additionalNetworks` collection, you must specify an empty collection.
3. Remove the `NetworkAttachmentDefinition` CR from the network of your cluster by entering the following command:

   ```terminal
   $ oc delete net-attach-def <name_of_network_attachment_definition>
   ```

   Replace `<name_of_network_attachment_definition>` with the name of the `NetworkAttachmentDefinition` CR that you want to remove.
4. Save your changes and quit the text editor to commit your changes.
5. Optional: Confirm that the secondary network CR was deleted by running the following command:

   ```terminal
   $ oc get network-attachment-definition --all-namespaces
   ```