# Split 100G into 4×25G

---

## Goal

The goal of the steps below is to configure the switch to split each 100G interface into 4 interfaces each capable of 25G. 

This way, the switch can work well with the existing 4 X 25G sfp pcie cards.

## Steps Before Using the Switch

### Step 1: Connect the Breakout Cable

- Connect one end of the **breakout cable** to the switch **100G port**.

- The other end should connect to the PC, split between the PCIe network cards.

- Each network card should have **two cables** connected.

![Split 100G into 4×25G — Breakout cable](./img/network_setup/split_the_100g_interface/breakout_cable.png)

### Step 2: Connect a Laptop for Configuration

- Use an **ethernet cable** to connect your laptop directly to the switch.

- The switch has a port marked **MGT (management)**. Connect the cable there and to your laptop.

- Once configuration is done, this cable can be disconnected.

![Split 100G into 4×25G — Management port](./img/network_setup/split_the_100g_interface/managment_port.png)

### Step 3: Set Laptop IP Address

- By default, the switch uses IP **192.168.1.1**.

- Set your laptop LAN IP to the same range (e.g., **192.168.1.10**).

### Step 4: Access the Web Management Interface

- Open a browser and navigate to **192.168.1.1**.

- You should see the **web-based management system** of the switch.

### Step 5: Login to Web Interface

- Use the following credentials:

  - **User:** admin

  - **Password:** admin

![Split 100G into 4×25G — Web portal](./img/network_setup/split_the_100g_interface/web_portal.png)

## Switch Configuration via Terminal

### Step 6: Open a Terminal

- On your **laptop**, open **PuTTY** (or another SSH client).

- Connect to the switch:

  ```bash

  ssh admin@192.168.1.1

  ```

- Password: **admin**

![Split 100G into 4×25G — Ssh](./img/network_setup/split_the_100g_interface/ssh.png)

### Step 7: Split the 100G Interfaces

- The switch has two **100G interfaces**.

- We need to split each into **4 × 25G** for use with the breakout cable.

Run the following commands:

```bash

configure terminal

split interface eth-0-25 25G

split interface eth-0-26 25G

exit

write memory

reload

```

- Press **Enter** to confirm the reboot.

## Summary

At the end of this process, you should have the 100G interface splitted into 4 interfaces. 

![Split 100G into 4×25G — Interface is splited](./img/network_setup/split_the_100g_interface/interface_is_splited.png)