VLAN COMMANDS
switchport allowed vlan
Use this command to configure VLAN groups on the selected interface. Use the no form to restore the default.
Syntax
switchport allowed vlan {add vlan remove vlan} no switchport allowed vlan
•add vlan - VLAN identifier to add.
•remove vlan - VLAN identifier to remove. Do not enter leading zeros. (Range:
Default Setting
All ports are assigned to VLAN 1 by default.
The default frame type is untagged.
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
•If switchport mode is set to trunk, then you can only assign an interface to VLAN groups as a tagged member.
•Frames are always tagged within the switch. The tagged/ untagged parameter used when adding a VLAN to an interface tells the switch whether to keep or remove the tag from a frame on egress.
•If none of the intermediate network devices nor the host at the other end of the connection supports VLANs, the interface should be added to these VLANs as an untagged member. Otherwise, it is only necessary to add at most one VLAN as untagged, and this should correspond to the native VLAN for the interface.
•If a VLAN on the forbidden list for an interface is manually added to that interface, the VLAN is automatically removed from the forbidden list for that interface.