Fortinet FortiGate FortiGate-100A Install Manual page 64

Configuring the ADSL interface using the CLI
64
General keywords and variables applicable to the ADSL interface
You might need to configure these settings to communicate with your ISP.
Keywords and variables
ip <interface_ipv4mask>
ipunnumbered
<unnumbered_ipv4>
mode <interface_mode>
mtu <mtu_bytes>
mtu-override
{enable | disable}
FortiGate-60 series and FortiGate-100A FortiOS 3.0 MR4 Install Guide
Configuring the ADSL interface
Description
Enter the interface IP address and
netmask.
This is not available if mode is set to
dhcp, pppoa or pppoe.
This is available in NAT/Route mode
only.
The IP address cannot be on the same
subnet as any other interface.
Enable IP unnumbered mode for
PPPoE or PPPoA. Specify the IP
address to be borrowed by the interface.
This IP address can be the same as the
IP address of another interface or can
be any IP address.
The Unnumbered IP may be used for
PPPoE or PPPoA interfaces for which
no unique local address is provided. If
you have been assigned a block of IP
addresses by your ISP for example, you
can add any of these IP addresses to
the Unnumbered IP.
Configure the connection mode for the
interface. This is available only in
NAT/Route mode.
dhcp
• Configure the interface to receive its
IP address from a DHCP server.
pppoe
• Configure the interface to receive its
IP address from a PPPoE server.
pppoa
• Configure the interface to receive its
IP address from a PPPoA server.
eoa
• Configure a static IP address for the
interface in ADSL EoA bridge mode.
ipoa
• Configure a static IP address for the
interface in ADSL IPoA route mode.
Set custom maximum transmission unit
(MTU) size in bytes. Ideally mtu should
be the same as the smallest MTU of all
the networks between this FortiGate
unit and the destination of the packets.
For static mode the <mtu_bytes>
range is 576 to 1500 bytes.
For dhcp mode the <mtu_bytes>
range is 576 to 1500 bytes.
For pppoe mode the <mtu_bytes>
range is 576 to 1492 bytes.
In Transparent mode, if you change the
MTU of an interface, you must change
the MTU of all interfaces to match the
new MTU.
This is available when mtu-override
is enabled.
Select enable to use custom MTU size
instead of default (1500).
Default
No default.
No default.
eoa
1500
disable
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