Chapter 8 Hardware Acceleration : NP4 Acceleration : Configuring Inter-VDOM link acceleration with NP4 processors
  
Configuring Inter-VDOM link acceleration with NP4 processors
FortiGate units with NP4 processors include inter-VDOM links that can be used to accelerate inter-VDOM link traffic.
For a FortiGate unit with two NP4 processors there are also two inter-VDOM links, each with two interfaces:
npu0-vlink
npu0-vlink0
npu0-vlink1
npu1-vlink
npu1-vlink0
npu1-vlink1
These interfaces are visible from the GUI and CLI. For a FortiGate unit with NP4 interfaces, enter the following CLI command (output shown for a FortiGate-5001B):
get hardware npu np4 list
ID    Model         Slot       Interface
0     On-board                 port1 port2 port3 port4
                               fabric1 base1 npu0-vlink0 npu0-vlink1
1     On-board                 port5 port6 port7 port8
                               fabric2 base2 npu1-vlink0 npu1-vlink1
By default the interfaces in each inter-VDOM link are assigned to the root VDOM. To use these interfaces to accelerate inter-VDOM link traffic, assign each interface in a pair to the VDOMs that you want to offload traffic between. For example, if you have added a VDOM named New-VDOM to a FortiGate unit with NP4 processors, you can go to System > Network > Interfaces and edit the npu0-vlink1 interface and set the Virtual Domain to New-VDOM. This results in an inter-VDOM link between root and New-VDOM. You can also do this from the CLI:
config system interface
edit npu0-vlink1
set vdom New-VDOM
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