Split Port Mode for QSFP ports

The quad small form-factor pluggable transceiver (QSFP/QSPF28) is a module that offers high-density 40/100 Gigabit Ethernet connectivity options for data center and high-performance computing networks. The QSFP transceiver module is a hot-swappable, parallel fiber-optic/copper module with four independent optical transmit and receive channels. These channels can terminate in another Ethernet QSFP transceiver, or the channels can be broken out to four separate physical ports.

Configuration of which FortiSwitch ports are split is controlled directly on the FortiSwitch. An administrator needs to manually log into the FortiSwitch and set the desired split port configuration. After a split port configuration change is made on the FortiSwitch, it will automatically reboot. If the FortiSwitch was previously discovered or authorized, it should be deleted to allow the switch to be newly discovery again.

This feature requires a FortiSwitch model with SFP+ 40G ports, and FortiSwitch must be in Fortlink mode when changing the split configuration.

To use FortiSwitch with split ports with the switch controller (previously discovered):

1. On FortiSwitch, change the split mode:

   This change requires a reboot.

   config switch phy-mode

   set port29-phy-mode 4x10G

   set port30-phy-mode 4x10G

   end

2. Delete the FortiSwitch from managed-switch stanza.
3. Discover and authorize.

To use FortiSwitch with split ports with the switch controller (out of the box with factory defaults):

1. Discover and Authorize.

   This change requires a reboot.

2. On FortiSwitch, change split mode.

   This change requires a reboot.

3. Delete switch from managed-switch stanza.
4. Discover and authorize.

No CLI changes; however, FortiGate introduces a new FortiSwitch port index:

config switch-controller managed-switch
    edit S524DN4K15000008
        config ports
            edit "port29.1"
                set speed 10000
                set vlan "vsw.port11"
                set allowed-vlans "qtn.port11"
                set untagged-vlans "qtn.port11"
                set export-to "root"
            next
            ......
            edit "port29.4"
                set speed 10000
                set vlan "vsw.port11"
                set allowed-vlans "qtn.port11"
                set untagged-vlans "qtn.port11"
                set export-to "root"
            next
            edit "port30.1"
                set speed 10000
                set vlan "vsw.port11"
                set allowed-vlans "qtn.port11"
                set untagged-vlans "qtn.port11"
                set export-to "root"
            next
            ......
            edit "port30.4"
                set speed 10000
                set vlan "vsw.port11"
                set allowed-vlans "qtn.port11"
                set untagged-vlans "qtn.port11"
                set export-to "root"
            next
        end
    next
end