Dell EMC SmartFabric OS10 User Guide Release 10.5.2

All interface ports are administratively up in L2 mode and are automatically placed in the default VLAN as untagged interfaces.

When you assign a port to a non-default VLAN in Trunk mode, the interface remains an untagged member of the default VLAN and a tagged member of the new VLAN. When you assign a port to a non-default VLAN in Access mode, it removes from the default VLAN and is assigned to the new VLAN as an untagged member of the new VLAN.

• VLAN 1 is the default VLAN.
• You cannot delete the default VLAN. However, you can change the default VLAN ID number using the default vlan-id command.

When the default VLAN is changed from VLAN 1 to any other VLAN, IGMP snooping gets enabled in VLAN 1. To disable IGMP snooping on VLAN 1, use the no ip igmp snooping command in VLAN INTERFACE mode.

Use the show vlan command to verify that the interface is part of the default VLAN (VLAN 1).

Default VLAN configuration

OS10# show vlan
Codes: * - Default VLAN, M - Management VLAN, R - Remote Port Mirroring VLANs,
       @ - Attached to Virtual Network, P - Primary, C - Community, I - Isolated
Q: A - Access (Untagged), T - Tagged
    NUM    Status    Description   Q Ports
*   1      Active                    A Eth1/1/1-1/1/54