PRP trailer packets on SoC4 platforms

Parallel Redundancy Protocol (PRP) trailer packets on SoC4 platforms is supported. If a packet with the PRP header is received, the FortiGate will keep it and forward the packet with the header information.

The following commands are included for configuring PRP trailer packet handling:

config system settings
    set prp-trailer-action {enable | disable}
end
config system npu-setting prp
    set prp-port-in <Ingress port>
    set prp-port-out <Egress port>
end

Command	Description
prp-port-in <Ingress port>	Ingress port configured to allow the PRP trailer not be stripped off when the PRP packets come in. All of the traffic originating from these ports will always be sent to the host.
prp-port-out <Egress port>	Egress port configured to allow the PRP trailer not be stripped off when the PRP packets go out.

To allow PRP trailer packet handling on SoC4 platforms:

1. Enable PRP trailer handling in the VDOM system settings:

   config system settings
       set prp-trailer-action enable
   end

2. Set the inbound and outbound PRP interfaces:

   config system npu-setting prp
       set prp-port-in "port7"
       set prp-port-out "port8"
   end

3. Send packets to the inbound port7. The PRP trailer header will be included in packets outgoing from the port8 interface.