How to set up your FortiWAN
Planning the network topology
WAN link and WAN port
A WAN link is a link connect to the ISP for accessing the Internet from your internal network. A WAN link is configured
with informations provided by your ISP such as IP addresses, default gateway, network mask or username/password,
it depends on the WAN link type you apply to the ISP (See "
WAN types: Routing mode and Bridge mode
"). A WAN
port on FortiWAN is a physical network interface. Taking
FortiWAN 200B
for example, it supports
25
WAN link
connections in maximum (while
FortiWAN 1000B
and
FortiWAN 3000B
support
50
WAN links in maximum), but
only provides 5 physical ports. Thus, with the deployment of VLAN on a WAN port (See "
"), multiple WAN links can be connected to one WAN port. The WAN Link field lists the WAN links by
numbers, such as WAN link 1, WAN link 2, WAN link 3 and so on. Select a WAN link from the list and start the
configuration then (See "
").
See also
Configurations for VLAN and Port Mapping
WAN types: Routing mode and Bridge mode
It requires FortiWAN’s WAN ports connecting to ISP’s networks to access the Internet. According to the various
networks the ISP provides you, FortiWAN supports five types of networks to connect to the WAN ports.
l
Routing Mode
(See "
Configurations for a WAN link in Routing Mode
")
l
Bridge Mode: One Static IP
(See "
Configurations for a WAN link in Bridge Mode: One Static IP
")
l
Bridge Mode: Multiple Static IP
(See "
Configurations for a WAN link in Bridge Mode: Multiple Static IP
")
l
Bridge Mode: PPPoE
(See "
Configurations for a WAN link in Brideg Mode: PPPoE
")
l
Bridge Mode: DHCP Client
(See "
Configurations for a WAN link in Bridge Mode: DHCP
")
To select appropriate WAN Type on FortiWAN, please identify the type of IP addresses that ISP provided you for
accessing Internet and recognize the way to deploy FortiWAN in current network infrastructure. Here are
considerations going to concern.
An ISP provides either static or dynamic IP addresses for accessing Internet according your application. PPPoE or
DHCP is the most common way for ISP to assign a dynamic IP address to clients. For the two applications, please
simply configure your WAN link on FortiWAN as
or
As for static IP addresses, ISP provides for clients in different ways. Generally, you obtain static IP addresses from ISP
in three types:
An available subnet
For example, ISP provides an ADSL link with a subnet 203.69.118.8/29 contains five host addresses, one gateway
address, one broadcast address and one for subnet ID. The result of subnet mask calculation shows there are eight IP
addresses in the subnet in total, which matches the IP addresses you obtained. In this case, the gateway is located at
your ATU-R which routes packets to ISP’s network. In the other words, the ATU-R connects a subnet with FortiWAN
and another subnet with ISP’s central office terminal in routing mode. You are suggested to configure the WAN link as
on FortiWAN for this application.
22
FortiWAN Handbook
Fortinet Technologies Inc.
