switchport allowed vlan
This command configures VLAN groups on the selected interface. Use the
no
form
to restore the default.
Syntax
switchport allowed vlan {add vlan-list [tagged | untagged] |
remove
vlan-list}
no switchport allowed vlan
• add vlan-list - List of VLAN identifiers to add.
• remove vlan-list - List of VLAN identifiers to remove.
• vlan-list - Sep arat e n onc on sec ut ive V LAN identifiers with a comm a and no
spaces; use a hyphen to designate a rang e of ID s. Do not ente r leadin g
zeros. (Range: 1-4093).
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
• A port, or a trunk with switchport mode set to hybrid, must be assign ed to at
least one VLAN as untagged.
• If a tr unk has switchport mode set to trun k (i.e., 1Q Trunk), then you can on ly
assign an interface to VLAN groups as a tagged member.
• Frames are always tagged within the switch. The tagged/untagged pa ramet er
used when adding a VLAN to an interface tells the switch whether to ke ep or
remove the tag from a frame on egres s.
• If none of the intermediate net work devices no r the host at the other end of the
connection supports VLANs, the interface should be added to these VLA Ns
as an untagged member. Otherwise, i t is only necessary t o add at most one
VLAN as untagged, and this should correspond to the nati ve 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 li st for that
interface.
Example
The following example shows how to add VLA Ns 1, 2, 5 and 6 to t he allowed lis t as
tagged VLANs for port 1:
Console(config)#interface ethernet 1/1
Console(config-if)#switchport allowed vlan add 1,2,5,6 tagged
Console(config-if)#
34-11
Configuring VLAN Interfaces
34