apparently YES

" On 17 November 1964, the Soviet Politburo decided to send increased support to North Vietnam. The largest part of the Soviet adviser personnel were air defense officers. The Soviets provided the V-75 (SA-2GUIDELINE) missile system as the primary air defense system. They supplemented this with anti-aircraft guns and possibly some S-125 'Neva'(SA-3 GOA) missiles. Short-range air defenseweapons included the Strela 2 (SA-7 GRAIL) shoulder-fired missiles. The Soviet advisers primary mission was to train the North Vietnamese to use the Soviet equipment. The Soviets wore North Vietnamese uniforms while they performed their duties. The DRVN had a nation-wide integrated air-defense system with the bulk of assets in the north."

http://www.globalsecurity.org/military/world/vietnam/nva-ad-sam.htm