Chapter 2 Advanced Routing for FortiOS 5.0 : Border Gateway Protocol (BGP) : Dual-homed BGP example : Configuring the FortiGate unit
  
Configuring the FortiGate unit
In this topology, the FortiGate unit is the link between the Company Network and the ISP network. The FortiGate unit is the only BGP router on the Company Network, but there is at least one other BGP router on the ISP Network — there may be more but we don’t have that information.
As mentioned in the general configuration steps, the ISP must be notified of the Company’s BGP router configuration when complete as it will need to add the FortiGate BGP router as a neighbor router on its domain. This step is required for the FortiGate unit to receive BGP routing updates from the ISP network and outside networks.
If the ISP has any special BGP features enabled such as graceful restart, or route dampening that should be determined up front so those features can be enabled on the FortiGate unit.
To configure the FortiGate unit as a BGP router
1. Configure interfaces and default routes
2. Configure firewall services, addresses, and policies
3. Set the FortiGate BGP information
4. Add the internal network to the AS
5. Additional FortiGate BGP configuration