Administrator Guide

Virtual LANs (VLANs)

Dell Networking OS supports virtual LANs (VLANs).

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 Dell Networking operating system (OS)

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 the 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.

Feature

Default

Spanning Tree

group ID

All VLANs are part of Spanning Tree group 0.

Mode Layer 2 (no IP address is assigned).

Default VLAN ID VLAN 1

Topics:

• Default VLAN

• Enabling Null VLAN as the Default VLAN

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