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Split the 100G upload interface into 4 X 25G on an fs.com switch

Table of contents

  1. Goal
  2. Steps Before Using the Switch
    1. Step 1: Connect the Breakout Cable
    2. Step 2: Connect a Laptop for Configuration
    3. Step 3: Set Laptop IP Address
    4. Step 4: Access the Web Management Interface
    5. Step 5: Login to Web Interface
  3. Switch Configuration via Terminal
    1. Step 6: Open a Terminal
    2. Step 7: Split the 100G Interfaces
  4. Summary

Goal

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

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.

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

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:
    ssh admin@192.168.1.1
  • Password: admin

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:

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. interface_is_splited.png