Some observers have likened the inter-Korean peace process as a model for other divided lands, now the multilateral approach (mainly the US-China cooperation) to resolving security issues in Korean peninsula is being offered as a viable approach in the case of Iran.
Zbigniew Brzezinski who was national security adviser to President Jimmy Carter, makes this point in his op-ed article in today's The Washington Post titled "A Partner For Dealing With Iran?: The Lessons of U.S.-China Cooperation on Pyongyang."
Brzesinski was hawkish in Jimmy Carter's term at the White House but is a foreign policy realist. On Korea policy, Jimmy Carter unsuccessfully tried to reduce US troop level in South Korea and remove US nuclear weapons from Korea. However, Carter made real impact on Korea policy when he visited North Korea in 1994 as ex-president that resulted in the first negotiated settlement over North Korea's nuclear program.