System Settings : General settings : Network : Configuring IPv6 static routes
 
Configuring IPv6 static routes
Go to System Settings > General > Network and select the IPv6 Routing Table button to view, edit, or add to the IPv6 static routing table. You may need to add entries to the routing table so that the FortiManager unit can reach FortiGate units on remote networks.
The following information and settings are available:
Delete
Select the check box next to the route number and select Delete to remove the route from the table.
Create New
Select Create New to add a new route. See “Add a IPv6 static route”.
Select the route number to edit the settings.
ID
The route number.
IPv6 Address
The destination IPv6 address for this route.
Gateway
The IP address of the next hop router to which this route directs traffic.
Interface
The network interface that connects to the gateway.
Add a IPv6 static route
Go to System Settings > General > Network, select the IPv6 Routing Table button, and select Create New to add a route, or select the route number to edit an existing route.
Figure 54: Create New route
Destination IPv6 Prefix
Enter the destination IPv6 prefix for this route.
Gateway
Enter the IP address of the next hop router to which this route directs traffic.
Interface
Select the network interface that connects to the gateway.