> For the complete documentation index, see [llms.txt](https://cookbook.denovolab.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cookbook.denovolab.com/system-administration/add-additional-ip-to-switch.md).

# Add Additional IP to Switch

## Introduction 

Each Class 4 UI can support multiple dnl\_softswitch instance*.*  Each dnl\_softswitch can listen to one or more SIP IP:port.  

In the 

#### Step 1: Check the IP address in your server

You need to make sure the IP you want to use is available in the Linux environment where you are installing Class 4 dnl\_softswitch. You can use the following command to check all IP addresses:

```bash
ip addr
```

Once you confirm you have the IP address in your server's networking.  You can add the IP in UI:

#### Step 2: Go to VoIP Gateway setup page

You can click on "VoIP Gateway" on the top right menu.

![](/files/-MZ5FYrua2VtQYqK9PSy)

#### Step 3: Add one ore more SIP Gateway

Each instance of dnl\_softswitch is one SIP gateway.  Each dnl\_softswitch has a private interface for the UI to manipulate with it.

![](/files/-MZ4wTBVNHGwaMSAmE_z)

#### Step 4: Add one or more SIP Profile

You can expand on the SIP Profile within each SIP Gateway and add additional SIP IP to it.