vlan trunk allowed
Syntax
vlan trunk allowed [<VLAN-LIST> | all]
no vlan trunk allowed [<VLAN-LIST>]
Description
Assigns a VLAN ID to an trunk interface. Multiple VLAN IDs can be assigned to a trunk interface. These VLAN IDs define which VLAN traffic is allowed across the trunk interface.
VLANs can be assigned only to a non-routed (layer 2) interface or LAG interface. By default, all interfaces are routed (layer 3) when created. Use the
no routing
command to disable routing on an interface.
The
no
form of this command removes one or more VLAN IDs from a trunk interface. When the last VLAN is removed from a trunk interface, the interface continues to operate in trunk mode, and will trunk all the VLANs currently defined on the switch, and any new VLANs defined in the future. To disable the trunk interface, use the command
shutdown.
Command context
config-if
Parameters
<VLAN-LIST>
Specifies the VLAN IDs to assign to the interface, as a range of numbers, separated by commas (2, 3, 4), dashes (2-4), or both (2-4,6). The VLAN IDs must exist. Range: 1 - 4094.
Specifies the VLAN IDs to assign to the interface, as a range of numbers, separated by commas (2, 3, 4), dashes (2-4), or both (2-4,6). The VLAN IDs must exist. Range: 1 - 4040.
all
Configures the trunk interface to allow all the VLANs currently configured on the switch and any new VLANs that are configured in the future.
Authority
Administrators or local user group members with execution rights for this command.
Examples
Assigning VLANs 2, 3, and 4 to trunk interface 1/1/2:
switch(config)# interface 1/1/2 switch(config-if)# no routing switch(config-if)# vlan trunk allowed 2,3,4
Assigning VLAN IDs 2 to 8 to trunk interface 1/1/2:
switch(config)# interface 1/1/2 switch(config-if)# no routing switch(config-if)# vlan trunk allowed 2-8
Assigning VLAN IDs 2 to 8 and 10 to trunk interface 1/1/2:
switch(config)# interface 1/1/2 switch(config-if)# no routing switch(config-if)# vlan trunk allowed 2-8,10
Removing VLAN IDs 2, 3, and 4 from trunk interface 1/1/2:
switch(config)# interface 1/1/2 switch(config-if)# no vlan trunk allowed 2,3,4
Removing all VLANs assigned to trunk interface 1/1/2:
switch(config)# interface 1/1/2 switch(config-if)# no vlan trunk allowed