Fortinet black logo

Administration Guide

PRP handling in NAT mode with virtual wire pair

PRP handling in NAT mode with virtual wire pair

PRP (Parallel Redundancy Protocol) is supported in NAT mode for a virtual wire pair. This preserves the PRP RCT (redundancy control trailer) while the packet is processed by the FortiGate.

To configure PRP handling on a device in NAT mode:
  1. Enable PRP in the VDOM settings:
    (root) # config system settings
        set prp-trailer-action enable
    end
  2. Enable PRP in the NPU attributes:
    (global) # config system npu
        set prp-port-in "port15"
        set prp-port-out "port16"
    end
  3. Configure the virtual wire pair:
    (root) # config system virtual-wire-pair
        edit "test-vwp-1"
            set member "port15" "port16"
        next
    end

PRP handling in NAT mode with virtual wire pair

PRP (Parallel Redundancy Protocol) is supported in NAT mode for a virtual wire pair. This preserves the PRP RCT (redundancy control trailer) while the packet is processed by the FortiGate.

To configure PRP handling on a device in NAT mode:
  1. Enable PRP in the VDOM settings:
    (root) # config system settings
        set prp-trailer-action enable
    end
  2. Enable PRP in the NPU attributes:
    (global) # config system npu
        set prp-port-in "port15"
        set prp-port-out "port16"
    end
  3. Configure the virtual wire pair:
    (root) # config system virtual-wire-pair
        edit "test-vwp-1"
            set member "port15" "port16"
        next
    end