Renewals
L-2 status may be renewed and extended within the United States when the L-1 visa is renewed. Renewal in the United States applies to status only, not the actual visa in the passport. For visa renewal, the applicant must go to a U.S. consulate or embassy outside the United States. An alien cannot leave the United States and then re-enter without a valid L-1 visa, and must appear personally before a consular officer for visa issuance. This often leads to difficulties for applicants, because it means leaving their adopted home in the United States for as long as it takes the embassy to issue their new visa. At particularly busy times of year, or at some consulates or embassies, this can take several weeks or more.
Read more about this topic: L-2 Visa