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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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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.

  • NOTE: You cannot assign an IP address to the Default VLAN. To assign an IP address to a VLAN that is currently the Default VLAN, create another VLAN and assign it to be the Default VLAN. For more information about assigning IP addresses, refer to Assigning an IP Address to a VLAN .
  • Untagged interfaces must be part of a VLAN. To remove an untagged interface from the Default VLAN, create another VLAN and place the interface into that VLAN. Alternatively, use the no switchport command, and Dell Networking OS removes the interface from the Default VLAN.
  • A tagged interface requires an additional step to remove it from Layer 2 mode. Because tagged interfaces can belong to multiple VLANs, remove the tagged interface from all VLANs using the no tagged interface command. Only after the interface is untagged and a member of the Default VLAN can you use the no switchport command to remove the interface from Layer 2 mode. For more information, refer to VLANs and Port Tagging .

Example of Configuring an Interface for Layer 2 Belonging to the Default VLAN

Dell(conf)#int tengig 3/2
                                 Dell(conf-if)#no shut
                                 Dell(conf-if)#switchport
                                 Dell(conf-if)#show config
                                 !
                                 interface Tengigabitethernet 3/2
                                 no ip address
                                 switchport
                                 no shutdown
                                 Dell(conf-if)#end
                                 Dell#show vlan
                                 
                                 Codes: * - Default VLAN, G - GVRP VLANs
                                 
                                 NUM Status  Q Ports
                                 * 1 Active    U Tengig 3/2
                                 2 Active    T Po1(So 0/0-1)
                                 T Tengig 3/0
                                 Dell#
                              

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