--- reviewers: - bboreham title: Weave Net for NetworkPolicy content_type: task weight: 60 --- This page shows how to use Weave Net for NetworkPolicy. ## {{% heading "prerequisites" %}} You need to have a Kubernetes cluster. Follow the [kubeadm getting started guide](/docs/reference/setup-tools/kubeadm/) to bootstrap one. ## Install the Weave Net addon Follow the [Integrating Kubernetes via the Addon](https://github.com/weaveworks/weave/blob/master/site/kubernetes/kube-addon.md#-installation) guide. The Weave Net addon for Kubernetes comes with a [Network Policy Controller](https://github.com/weaveworks/weave/blob/master/site/kubernetes/kube-addon.md#network-policy) that automatically monitors Kubernetes for any NetworkPolicy annotations on all namespaces and configures `iptables` rules to allow or block traffic as directed by the policies. ## Test the installation Verify that the weave works. Enter the following command: ```shell kubectl get pods -n kube-system -o wide ``` The output is similar to this: ``` NAME READY STATUS RESTARTS AGE IP NODE weave-net-1t1qg 2/2 Running 0 9d 192.168.2.10 worknode3 weave-net-231d7 2/2 Running 1 7d 10.2.0.17 worknodegpu weave-net-7nmwt 2/2 Running 3 9d 192.168.2.131 masternode weave-net-pmw8w 2/2 Running 0 9d 192.168.2.216 worknode2 ``` Each Node has a weave Pod, and all Pods are `Running` and `2/2 READY`. (`2/2` means that each Pod has `weave` and `weave-npc`.) ## {{% heading "whatsnext" %}} Once you have installed the Weave Net addon, you can follow the [Declare Network Policy](/docs/tasks/administer-cluster/declare-network-policy/) to try out Kubernetes NetworkPolicy. If you have any question, contact us at [#weave-community on Slack or Weave User Group](https://github.com/weaveworks/weave#getting-help).