System network
VLAN overview
FortiGate-60M Administration Guide
01-28007-0144-20041217
65
VLAN overview
A VLAN is group of PCs, servers, and other network devices that communicate as if
they were on the same LAN segment, even though they may not be. For example, the
workstations and servers for an accounting department could be scattered throughout
an office, connected to numerous network segments, but they can still belong to the
same VLAN.
A VLAN segregates devices logically instead of physically. Each VLAN is treated as a
broadcast domain. Devices in VLAN 1 can connect with other devices in VLAN 1, but
cannot connect with devices in other VLANs. The communication among devices on a
VLAN is independent of the physical network.
A VLAN segregates devices by adding 802.1Q VLAN tags to all of the packets sent
and received by the devices in the VLAN. VLAN tags are 4-byte frame extensions that
contain a VLAN identifier as well as other information.
VLANs allow highly flexible, efficient network segmentation, enabling users and
resources to be grouped logically, regardless of physical locations.
Figure 15: Basic VLAN topology
VLAN Switch or router
Internet
VLAN 1
VLAN 2
VLAN 1 network
VLAN 2 network
VLAN trunk
POWER
VLAN 1
VLAN 2
Firewall or
Router
Esc
Enter
Untagged
packets
Summary of Contents for FortiGate FortiGate-60M
Page 12: ...Contents 12 01 28007 0144 20041217 Fortinet Inc Index 369 ...
Page 44: ...44 01 28007 0144 20041217 Fortinet Inc Changing the FortiGate firmware System status ...
Page 74: ...74 01 28007 0144 20041217 Fortinet Inc FortiGate IPv6 support System network ...
Page 82: ...82 01 28007 0144 20041217 Fortinet Inc Dynamic IP System DHCP ...
Page 116: ...116 01 28007 0144 20041217 Fortinet Inc Access profiles System administration ...
Page 234: ...234 01 28007 0144 20041217 Fortinet Inc Protection profile Firewall ...
Page 246: ...246 01 28007 0144 20041217 Fortinet Inc CLI configuration Users and authentication ...
Page 278: ...278 01 28007 0144 20041217 Fortinet Inc CLI configuration VPN ...
Page 340: ...340 01 28007 0144 20041217 Fortinet Inc Using Perl regular expressions Spam filter ...
Page 358: ...358 01 28007 0144 20041217 Fortinet Inc CLI configuration Log Report ...
Page 376: ...376 01 28007 0144 20041217 Fortinet Inc Index ...