Administrator Guide

for individual ports by using the vlan tagged or vlan untagged commands in INTERFACE configuration
mode (Configuring VLAN Membership). Physical Interfaces and port channels can be members of VLANs.
NOTE: You can assign a static IP address to default VLAN 1 using the ip address command. To assign a
different VLAN ID to the default VLAN, use the default vlan-id vlan-id command.
Following table lists out the VLAN defaults in Dell Networking OS:
Table 25. VLAN Defaults
Feature Default
Mode Layer 2 (no IP address is assigned)
Default VLAN ID VLAN 1
Default VLAN
When an Aggregator boots up, all interfaces are up in Layer 2 mode and placed in the default VLAN as
untagged interfaces. Only untagged interfaces can belong to the default VLAN.
By default, VLAN 1 is the default VLAN. To change the default VLAN ID, use the default vlan-id <1–
4094> command in CONFIGURATION mode. You cannot delete the default VLAN.
Port-Based VLANs
Port-based VLANs are a broadcast domain defined by different ports or interfaces. In Dell Networking OS, a
port-based VLAN can contain interfaces from different stack units within the chassis. Dell Networking OS
supports 4094 port-based VLANs.
Port-based VLANs offer increased security for traffic, conserve bandwidth, and allow switch segmentation.
Interfaces in different VLANs do not communicate with each other, adding some security to the traffic on
those interfaces. Different VLANs can communicate between each other by means of IP routing. Because
traffic is only broadcast or flooded to the interfaces within a VLAN, the VLAN conserves bandwidth. Finally,
you can have multiple VLANs configured on one switch, thus segmenting the device
Interfaces within a port-based VLAN must be in Layer 2 mode and can be tagged or untagged in the VLAN ID.
VLANs and Port Tagging
To add an interface to a VLAN, it must be in Layer 2 mode. After you place an interface in Layer 2 mode, it is
automatically placed in the default VLAN. Dell Networking OS supports IEEE 802.1Q tagging at the interface
level to filter traffic. When you enable tagging, a tag header is added to the frame after the destination and
Interfaces 413