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USER GUIDE
FortiGate VLANs and VDOMs Version 3.0

www.fortinet.com

FortiGate VLANs and VDOMs User Guide Version 3.0 6 February 2007 01-30004-0091-20070308 © Copyright 2007 Fortinet, Inc. All rights reserved. No part of this publication including text, examples, diagrams or illustrations may be reproduced, transmitted, or translated in any form or by any means, electronic, mechanical,manual, optical or otherwise, for any purpose, without prior written permission of Fortinet, Inc. Trademarks Dynamic Threat Prevention System (DTPS), APSecure, FortiASIC, FortiBIOS, FortiBridge, FortiClient, FortiGate, FortiGate Unified Threat Management System, FortiGuard, FortiGuard-Antispam, FortiGuardAntivirus, FortiGuard-Intrusion, FortiGuard-Web, FortiLog, FortiAnalyzer, FortiManager, Fortinet,FortiOS, FortiPartner, FortiProtect, FortiReporter, FortiResponse, FortiShield, FortiVoIP, and FortiWiFi are trademarks of Fortinet, Inc. in the United States and/or other countries. The names of actual companies and products mentioned herein may be the trademarks of their respective owners.

Contents

Contents
Introduction........................................................................................ 7
About FortiGate VLANs and VDOMs ............................................................... 7 About this document......................................................................................... 7 Document conventions.................................................................................. 7 FortiGate documentation.................................................................................. 8 Related documentation ..................................................................................... 9 FortiManager documentation ........................................................................ 9 FortiClient documentation ........................................................................... 10 FortiMail documentation.............................................................................. 10 FortiAnalyzer documentation ...................................................................... 10 Fortinet Knowledge Center ......................................................................... 10 Comments on Fortinet technical documentation ......................................... 10 Customer service and technicalsupport ...................................................... 11

Introduction to VLANs and VDOMs................................................ 13
Overview of VLAN technology ....................................................................... 13 VLAN layer-2 switching ............................................................................... 14 VLAN layer-3 routing................................................................................... 16 Rules for VLAN IDs ..................................................................................... 17 Overview of Virtual Domains .......................................................................... 18 Maximum number of VDOMs ...................................................................... Inter-VDOM routing..................................................................................... Management VDOM ................................................................................... Administration of virtual domains ................................................................ Global and virtual domain settings .............................................................. For more information................................................................................... 18 18 19 19 19 21

Using VLANs in NAT/Route mode .................................................. 23
Overview........................................................................................................... 23 Configuring FortiGate units in NAT/Route mode ......................................... 23...