---
title: arpio-config:use-dynamic-address
description: Tells Arpio to allow AWS to select the private IPv4 address for an EC2 instance.
---

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# arpio-config:use-dynamic-address

## Tells Arpio to allow AWS to select the private IPv4 address for an EC2 instance.

```
arpio-config:use-dynamic-address = <any value>
```

#### **<any value>**

The presence of a tag with key `arpio-config:use-dynamic-address` enables this behavior.   The value may be any valid tag value, including an empty string.

### **Supported Resources**

- EC2 Instances

### **Description**

By default, Arpio tries to create a replicated EC2 instance with the same private IPv4 address(es) it has in the primary site.

Setting this tag on an EC2 instance tells Arpio to let AWS select the IP address for the instance.

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