---
title: Configure Network Interfaces
slug: litmusedge-v2/product-features/system/network/configure-network-interfaces
description: You can configure network interfaces from the Interfaces tab.
docTags: 
createdAt: 2022-09-27T13:21:29.000Z
---

You can configure the network interfaces by navigating to **System **>** Network** > **Interfaces**. 

![](https://api.archbee.com/api/optimize/SSUUxKZUk9bFTEPNn_6Zo/mFhHCHRxEIAyI8Xqpce6W_image.png)

:::hint{type="warning"}
**Caution**: Changing the network address may cause the application to stop working properly.
:::

# Before You Begin

Make sure your configuration is using the same network on which your device is located.

## IPv4 Address Types

The Litmus Edge software package installation includes a default configuration for the selected device's interface. You must configure the default entries with your own network information.

For IPv4 address assignment type, you can choose from a few different options.

- **None**: Disables IPv4 addresses on the network interface.
- **DHCP**: Auto-assigns an IPv4 address to the network interface.
- **Static**: Manually enter Gateway information for your network interface. Valid Gateways depend on your router configuration.
- **CIDR**: CIDR notation determines which IP addresses are allowed on the network. Entering your Gateway address and **/24** usually suffices because it allows close to 256 different IPv4 addresses, starting from your Gateway address. For example, if 192.168.7.17 is your Gateway, 192.168.7.17/24 denotes a good CIDR because it allows 238 (256 - 18) different IP addresses. For full details about CIDR, see the [CIDR Conversion Table](docId\:xOHTPWDxS8mIsBXSl2rMV).

For IPv6 address assignment type, you should use **Auto **instead of **DHCP **to automatically assign an IPv6 address.

## MTU settings


Maximum Transmission Unit (MTU) represents the largest packet size that a network can send without splitting packets. Set the correct MTU size to prevent fragmentation and dropped packets and to keep connections stable. For example, a common MTU size for Ethernet is 1500 bytes.

Header data is added to each packet when you use a tunnel, like a VPN or IPsec. Packets can get split or dropped when the total packet size, including the tunnel overhead, exceeds the network's MTU. This can cause slow connections or data loss. Lower the MTU on both sides of the tunnel to ensure that packets stay under the size limit and move through the network without being split.

# Update Network Interfaces

**To update the network interfaces:**

1. Navigate to **System **> **Network**. 
2. Click the **Interfaces **tab. 
3. Review the list of interfaces. Please note the following:
   - Devices are automatically detected by the system and should be listed under Interfaces. The *eth0 *configuration contains the default settings for the WAN (outgoing traffic). Do not change the settings for the WAN.
   - A USB to an Ethernet dongle is not recognized as a device due to security measures.
4. Click **Update **for an interface. Update the details for the interface. 
   - **WAN**: If the selected interface is *eth0*, select the **WAN **check box. Optionally, select the check box if the selected interface is *eth1*. 
   - **IPv4 Type**: Use the drop-down list to select *None*, *DHCP*, or *Static*. 
   - **IPv4 Gateway** (Optional): If you select *Static*, enter an IP address range. 
   - **IPv6 Type**: Use the drop-down list to select *None*, *Auto*, *DHCP*, or *Static*. It is recommended that you use *Auto *instead of *DHCP *to automatically assign an IPv6 address.
   - **IPv6 Gateway** (Optional): If you select *Static*, enter an IP address range.
   - **MTU**: Specify the largest packet size that the network can send without splitting packets.
5. Click **Update**. 
6. Reboot your device to apply any changes to network configuration.