## How to Configure Service and Pod Subnets

You can set the CIDR for the Pods subnet and Services subnet under `spec.clusterNetwork`:

```yaml
clusterNetwork:
  services:
    cidrBlocks: ["10.128.0.0/12"]
  pods:
    cidrBlocks: ["192.168.0.0/16"]
```

The `cidrBlocks` parameters expect an array of strings in IPv4 CIDR notation. The subnets can't have conflicting addresses and must be in the [Private IPv4 ranges](https://en.wikipedia.org/wiki/Private_network#Private_IPv4_addresses) described by RFC 1918.

{% callout type="note" %}
The CIDR blocks cannot be changed in running clusters, only at creation time.
{% /callout %}

You can also configure the domain for your services in the `spec.clusterNetwork` section:

```yaml
clusterNetwork:
  serviceDomain: "cluster.local"
```