Virtual Lans (Vlans); Default Vlan - Dell Force10 Z9000 Configuration Manual

Virtual LANs (VLANs)

Virtual LANs (VLANs) are supported on Dell Networking OS.
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
• VLAN Stacking in the Service Provider Bridging
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

Default VLAN

When you configure interfaces for Layer 2 mode, they are automatically placed in the Default VLAN as untagged interfaces. Only
untagged interfaces can belong to the Default VLAN.
The following example displays the outcome of placing an interface in Layer 2 mode. To configure an interface for Layer 2 mode, use
the switchport command. As shown in bold, the switchport command places the interface in Layer 2 mode and the show
vlan command in EXEC privilege mode indicates that the interface is now part of the Default VLAN (VLAN 1).
By default, VLAN 1 is the Default VLAN. To change that designation, use the default vlan-id command in CONFIGURATION
mode. You cannot delete the Default VLAN.
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