Virtual LANs (VLAN) | 90547Virtual LANs (VLAN)Virtual LANs (VLAN) are supported on platforms: e c s zThis section contains the following subsections:• Default VLAN• Port-Based VLANs• VLANs and Port Tagging• Configuration Task List for VLANs• Enable Null VLAN as the Default VLANVirtual LANs, or VLANs, are a logical broadcast domain or logical grouping of interfaces in a LAN inwhich all data received is kept locally and broadcast to all members of the group. When in Layer 2 mode,VLANs move traffic at wire speed and can span multiple devices. FTOS supports up to 4093 port-basedVLANs and 1 Default VLAN, as specified in IEEE 802.1Q.VLANs provide the following benefits:• Improved security because you can isolate groups of users into different VLANs• Ability to create one VLAN across multiple devicesFor more information on VLANs, refer to IEEE Standard 802.1Q Virtual Bridged Local Area Networks.In this guide, see also:• Bulk Configuration• VLAN StackingFor a complete listing of all commands related to FTOS VLANs, see these FTOS Command LineReference Guide chapters:• Interfaces chapter• Port Authentication (802.1x) section in the Security chapter• GARP VLAN Registration protocol (GVRP) chapter• Service Provider Bridging chapter• Per-VLAN Spanning Tree Plus (PVST+) chapter• For E-Series, see also the ACL VLAN Group and Force10 Resilient Ring Protocol chapters.
