Command Line Interface
862 1553-KDU 137 365 Uen D 2006-06-16
Command Usage
• A port, or a trunk with switchport mode set to hybrid, must be assigned
to at least one VLAN as untagged.
• If a trunk has switchport mode set to trunk (that is, 1Q Trunk), an
interface can only be assigned to VLAN groups as a tagged member.
• Frames are always tagged within the ECN330-switch. The tagged or
untagged parameter used when adding a VLAN to an interface tells the
ECN330-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.
Example
The following example shows how to add VLANs 1, 2, 5 and 6 to the allowed list
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)#
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