Technical Tip: Manually assign outgoing interface In SD-WAN setup

[carabhavi]

Description
This article describes how to force the traffic to take specific WAN link in SD-WAN configuration.
In FortiGate 6.2 and above firmware, it is possible to force the traffic for specific source or destination to take specific WAN link.

Scope

FortiGate.

Solution

To configure the manual mode from the FortiGate GUI on v6.2.x: 

Go to FortiGate -> Network -> SD-WAN rules.

To configure the manual mode from the FortiGate GUI on v6.4.x, 7.x:

To configure the manual mode from the FortiGate CLI, run the following commands:

config system sdwan

config service

edit <RULE-ID>

set name <CUSTOM-NAME>

set load-balance enable

set mode manual   <---------------

set hash-mode <PREFERRED-HASH-MODE>
set priority-members <MEMBER-ID> <MEMBER-ID> <MEMBER-ID>
...

next

end

end

Other strategy modes are listed below:

FortiGate (1) # set mode ?
auto          It assigns interfaces a priority based on quality.
manual        It assigns interfaces a priority manually (this is the default mode).
priority      It assigns interfaces a priority based on the link-cost-factor quality of the interface.
sla           It assigns interfaces a priority based on selected SLA settings.

Note:
If the defined interface is down or the WAN link is down, then traffic will take the secondary link.

Related articles:

Manual strategy