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Network configuration
Configuring VLANs
FortiGate-400 Installation and Configuration Guide
141
Adding VLAN subinterfaces
The VLAN ID of each VLAN subinterface must match the VLAN ID added by the IEEE
802.1Q-compliant router. The VLAN ID can be any number between 1 and 4096.
Each VLAN subinterface must also be configured with its own IP address and
netmask.
You add VLAN subinterfaces to physical interfaces. You can add over 1000 VLAN
subinterfaces to a FortiGate unit.
Rules for VLAN IDs
Two VLAN subinterfaces added to the same physical interface cannot have the same
VLAN ID. However, you can add two or more VLAN subinterfaces with the same
VLAN IDs to different physical interfaces. There is no internal connection or link
between two VLAN subinterfaces with same VLAN ID. Their relationship is the same
as the relationship between two main interfaces.
Rules for VLAN IP addresses
Normally, the IP addresses of all FortiGate interfaces cannot overlap. That is, the IP
addresses of all interfaces must be different on different subnets. However, some
overlap of VLAN subinterfaces is allowed. The rules for overlapping VLAN
subinterface IP addresses are:
• Two or more VLAN subinterfaces can have the same IP address as long as they
have different VLAN IDs.
• The IP addresses of two or more VLAN subinterfaces can be on the same subnet
as long as they have different VLAN IDs.
• The IP address of a VLAN subinterface must different from IP address of the
interface that it is added to.
• The IP address of a VLAN subinterface can be on the same subnet as the IP
address of the interface that it is added to.
• You cannot add firewall policies between 2 VLAN subinterfaces that have the same
IP address or that have IP addresses in the same subnet, even if their VLAN IDs
are different.
Adding a VLAN subinterface
Use the following procedure to add VLAN subinterfaces:
1
Go to
System > Network > Interface
.
2
Select New VLAN to add a VLAN subinterface.
3
Enter a Name to identify the VLAN subinterface.
The name can contain numbers (0-9), uppercase and lowercase letters (A-Z, a-z), and
the special characters - and _. Other special characters and spaces are not allowed.
4
Select the interface that receives the VLAN packets intended for this VLAN
subinterface.
5
Enter the VLAN ID that matches the VLAN ID of the packets to be received by this
VLAN subinterface.
The VLAN ID can be any number between 1 and 4096 but must match the VLAN ID
added by the IEEE 802.1Q-compliant router.
Содержание FortiGate 400
Страница 13: ...Contents FortiGate 400 Installation and Configuration Guide 13 Glossary 295 Index 299 ...
Страница 14: ...Contents 14 Fortinet Inc ...
Страница 44: ...44 Fortinet Inc Next steps Getting started ...
Страница 60: ...60 Fortinet Inc Configuration example Multiple connections to the Internet NAT Route mode installation ...
Страница 74: ...74 Fortinet Inc Transparent mode configuration examples Transparent mode installation ...
Страница 132: ...132 Fortinet Inc Registering a FortiGate unit after an RMA Virus and attack definitions updates and registration ...
Страница 148: ...148 Fortinet Inc Providing DHCP services to your internal network Network configuration ...
Страница 168: ...168 Fortinet Inc Customizing replacement messages System configuration ...
Страница 200: ...200 Fortinet Inc Content profiles Firewall configuration ...
Страница 258: ...258 Fortinet Inc Logging attacks Network Intrusion Detection System NIDS ...
Страница 294: ...294 Fortinet Inc Configuring alert email Logging and reporting ...
Страница 298: ...298 Fortinet Inc Glossary ...
Страница 308: ...308 Fortinet Inc Index ...