To configure the allowed VLANs for the private trunk interface, use the switchport private-vlan trunk allowed vlan command. To remove the allowed VLANs, sue the no form of this command.
switchport private-vlan trunk allowed vlan { vlan-list | { add | except | remove } vlan-list | all | none }
no switchport private-vlan trunk allowed vlan vlan-list
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vlan-list
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VLAN IDs of the allowed VLANs when the interface is in private-vlan trunking mode. The range is from 1 to 4094, except for the VLANs reserved for internal use.
Use a hyphen (-) to separate the beginning and ending IDs of a range of VLAN IDs; for example, 70-100.
Use a comma (,) to separate individual VLAN IDs and ranges of VLAN IDs; for example, 20,70-100,142.
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add
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Specifies the VLANs to be added to the current list.
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except
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Specifies all VLANs to be added to the current list, except the specified VLANs.
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remove
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Specifies the VLANs to be removed from the current list.
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all
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Specifies all VLANs to be added to the current list.
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none
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Specifies that no VLANs be added to the current list.
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Allows only associated VLANs on the private VLAN trunk interface.
Interface configuration mode
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Release
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Modification
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4.0(0)N1(1a)
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This command was introduced.
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The primary VLANs do not need to be explicitly added to the allowed VLAN list. They are added automatically once there is a mapping between primary and secondary VLANs.
This example shows how to add VLANs to the list of allowed VLANs on an Ethernet private VLAN trunk port:
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Command
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Description
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show interface switchport
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Displays information on all interfaces configured as switch ports.
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switchport mode private-vlan trunk
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Configures the port as a secondary trunk port for a private VLAN.
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show vlan private-vlan
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Displays the status of the private VLAN.
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