Displays a list of IEEE 802.1Q tags that are configured on the
    switch port connected to the specified physical LAN device.
    LANCP listens for the GVRP (GARP (Generic Attribute Registration
    Protocol) VLAN Registration Protocol) packets that contain the
    configuration information and displays the configured tags.

    The switch periodically sends GVRP packets to provide VLAN
    configuration information in compliance with the IEEE 802.1Q
    specification. If GVRP is not configured on the switch, or if the
    LAN device is not connected to a switch, this command displays
    only the list of tags that the VLAN driver has configured.