Fortinet FortiGate 50A User Manual download pdf (Page 103)

Network configuration Configuring routing

FortiGate-50A Installation and Configuration Guide 103

To configure the routing table

1 Go to System > Network > Routing Table.

2 Choose the route that you want to move and select Move to to change its order in

the routing table.

3 Type a number in the Move to field to specify where in the routing table to move the

route and select OK.

4 Select Delete to delete a route from the routing table.

Figure 9: Routing table

Policy routing

Policy routing extends the functions of destination routing. Using policy routing you

can route traffic based on the following:

• Destination address

• Source address

• Protocol, service type, or port range

• Incoming or source interface

Using policy routing you can build a routing policy database (RPDB) that selects the

appropriate route for traffic by applying a set of routing rules. To select a route for

traffic, the FortiGate unit matches the traffic with the policy routes added to the RPDB

starting at the top of the list. The first policy route that matches is used to set the route

for the traffic. The route supplies the next hop gateway as well as the FortiGate

interface to be used by the traffic.

Packets are matched with policy routes before they are matched with destination

routes. If a packet does not match a policy route, it is routed using destination routes.

The gateway added to a policy route must also be added to a destination route. When

the FortiGate unit matches packets with a route in the RPDB, the FortiGate unit looks

in the destination routing table for the gateway that was added to the policy route. If a

match is found, the FortiGate unit routes the packet using the matched destination

route. If a match is not found, the FortiGate unit routes the packet using normal

routing.

To find a route with a matching gateway, the FortiGate unit starts at the top of the

destination routing table and searches until it finds the first matching destination route.

This matched route is used to route the packet.

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Fortinet FortiGate 50A User Manual Page 103