@param sw_if_index - index of the interface
@param sup_sw_if_index - index of parent interface if any, else same as sw_if_index
@param l2_address_length - length of the interface's l2 address
@param sw_if_index - index of the interface
@param sup_sw_if_index - index of parent interface if any, else same as sw_if_index
@param l2_address_length - length of the interface's l2 address