System Network Interfaces
FortiGate Version 4.0 Administration Guide
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The switch mode feature has two states - switch mode and interface mode. Switch mode
is the default mode with only one interface and one address for the entire internal switch.
Interface mode allows you to configure each of the internal switch physical interface
connections separately. This allows you to assign different subnets and netmasks to each
of the internal physical interface connections.
FortiGate models 100A and 200A Rev2.0 and higher have four internal interface
connections. The FortiGate-60B and FortiWifi-60B have six internal interface connections.
Consult your release notes for the most current list of supported models for this feature.
Selecting Switch Mode on the System > Network > Interface screen displays the Switch
Mode Management screen.
Figure 55: Switch Mode Management
Switch Mode can also be configured using CLI commands. For more information see the
FortiGate CLI Reference.
Interface settings
Go to System > Network > Interface and select Create New.
Selecting the Create New arrow enables you to create Inter-VDOM links. For more
information on Inter-VDOM links, see “Inter-VDOM links” on page 113.
Some types of interfaces such as loopback interfaces can only be configured using CLI
commands. For more information, see “Configuring interfaces with CLI commands” on
page 134 or the FortiGate CLI Reference
To be able to configure a DHCP server on an interface, that interface must have a static IP
address.
You cannot create a virtual IPSec interface on this screen, but you can specify its endpoint
addresses, enable administrative access and provide a description if you are editing an
existing interface. For more information, see “Configuring a virtual IPSec interface” on
page 133.
Caution: Before you are able to change between switch mode and interface mode all
references to ‘internal’ interfaces must be removed. This includes references such as
firewall policies, routing, DNS forwarding, DHCP services, VDOM interface assignments,
and routing. If they are not removed, you will not be able to switch modes, and you will see
an error message.
Switch Mode Select Switch Mode. Only one internal interface is displayed. This is the default
mode.
Interface Mode Select Interface Mode. All internal i nterfaces on the switch are displayed as
individually configurable interfaces.
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