Dell PowerSwitch S4820T Configuration Guide for the S4820T System 9.100.0 - Page 883

59 Virtual LANs (VLANs) Virtual LANs (VLANs) are a logical broadcast domain or logical grouping of interfaces in a local area network (LAN) in which 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. The system supports up to 4093 port-based VLANs and one default VLAN, as specified in IEEE 802.1Q. VLANs benefits include: • Improved security because you can isolate groups of users into different VLANs • Ability to create one VLAN across multiple devices For more information about VLANs, refer to the IEEE Standard 802.1Q Virtual Bridged Local Area Networks. In this guide, also refer to: • Bulk Configuration in the Interfaces chapter. • VLAN Stacking in the Service Provider Bridging chapter. For a complete listing of all commands related to Dell Networking OS VLANs, refer to these Dell Networking OS Command Reference Guide chapters: • Interfaces • 802.1X • GARP VLAN Registration Protocol (GVRP) • Service Provider Bridging • Per-VLAN Spanning Tree Plus (PVST+) The following table lists the defaults for VLANs in Dell Networking OS. Feature Default Spanning Tree group All VLANs are part of Spanning Tree group 0. ID Mode Layer 2 (no IP address is assigned). Default VLAN ID VLAN 1 Topics: • Default VLAN • Port-Based VLANs • VLANs and Port Tagging • Configuration Task List • Configuring Native VLANs • Enabling Null VLAN as the Default VLAN Virtual LANs (VLANs) 883