Dell N1100-ON, Reference Manual

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Layer 2 Switching Commands
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– all specifies all VLANs from 1 to 4093. This keyword is not allowed on
commands that do not permit all VLANs in the list to be set at the
same time.
– add adds the defined list of VLANs to those currently set instead of
replacing the list.
– remove removes the defined list of VLANs from those currently set
instead of replacing the list. Valid IDs are from 1 to 4093; extended-
range VLAN IDs of the form X-Y or X,Y,Z are valid in this command.
– except lists the VLANs that should be calculated by inverting the
defined list of VLANs. (VLANs are added except the ones specified.)
– vlan-atom is either a single VLAN number from 1 to 4093 or a
continuous range of VLANs described by two VLAN numbers, the
lesser one first, separated by a hyphen.
• valid–id—A valid VLAN id in the range 1–4093. This is the native VLAN
for the trunk port and will accept and send traffic on this VLAN in
untagged format.
Default Configuration
A trunk port is a member of all VLANs by default.
VLAN 1 is the default native VLAN on a trunk port. The default allowed
VLAN membership on a trunk port is all VLANs.
Command Mode
Interface Configuration (gigabitethernet, port-channel, tengigabitethernet,
fortygigabitethernet) mode
Interface Range mode
Port-Channel Range mode
User Guidelines
Untagged traffic received on a trunk port is forwarded on the native VLAN, if
configured.
To drop untagged traffic on a trunk port, remove the native VLAN from the
trunk port. (Ex. switchport trunk allowed vlan remove 1 .) Management
traffic is still allowed on the trunk port in this configuration.