Technical Tip: How to perform split port on the FortiGate 7000 series

Description
This article provides guidance on how to perform split ports on FortiGate 7000 series.

Solution
The Fortigate 7000 series FIM Module supports split port feature.
FIM-7904E    - Each 40G port can be split into 4x10G/1G interface
FIM-7910E    - Each 100G port can be split into 10x10G interfaces
FIM-7920E    - Each 40G port can be split into 4x10G interfaces

The following command can be used to split ports:

# config system global
    set split-port <port>
end

Splitting the interfaces requires a system reboot. Multiple interfaces may be split at the same time.

For example, to split the B1 interface of the FIM-7904E in slot 1 (this interface is named 1-B1) and the B1 and B4 interfaces of the FIM-7904E in slot 2 (these interfaces are named 2-B1 and 2-B4) connect to the CLI of the FortiGate-7000 system using the management IP and enter the following command:

# config system global
    set split-port 1-B1 2-B1 2-B4
end
System will reboot to make the setting take effect.
Do you want to continue? (y/n) y

After entering the command, the FortiGate-7000 goes into a reboot.
After the system boots up, the following changes take place:

The 1-B1 interface will no longer be available. Instead the 1-B1/1, 1-B1/2, 1-B1/3, and 1-B1/4 interfaces will be available.
The 2-B1 interface will no longer be available. Instead the 2-B1/1, 2-B1/2, 2-B1/3, and 2-B1/4 interfaces will be available.
The 2-B4 interface will no longer be available. Instead the 2-B4/1, 2-B4/2, 2-B4/3, and 2-B4/4 interfaces will be available.