"Russia should agree with this charge," Konstantin Kosachev, the chairman of the State Duma international affairs committee said, adding that Kaloyev's defendants would appeal the sentence.
According to Swiss law, "this sentence is a minimal punishment given the gravity of charges."
He said the Swiss court understood Kaloyev's tragedy, and had not sentenced him to the maximum term of 20 years.
Kosachev also said the Russian side should seek Kaloyev's extradition to let him serve at least a part of his term in Russia. "Today all relevant departments should focus on returning Kaloyev to Russia."
Kaloyev lost his family in an air crash in July 2002, when a Tu-154 plane owned by Bashkirian airlines collided with a DHL-owned Boeing over Germany's Lake Constance. Sixty-nine people, including 45 Bashkirian children, who were flying to Spain for a holiday, and two Boeing pilots, were killed.
German investigators said the accident was due largely to negligence on the part of Skyguide, and partially the fault of the two Russian pilots.
Peter Nielsen, a Skyguide air traffic controller, was stabbed to death on February 24, 2004 near his house in the Swiss town of Kloten. Kaloyev was arrested in a local hotel a day later.