The vote comes a day after Putin asked lawmakers to rescind his earlier request for using troops in Ukraine. He said that his move is intended to help support peace process in Ukraine, which began a weeklong cease-fire on Friday.
Putin needs to show his support for Ukrainian President Petro Poroshenko's peace plan ahead of Friday's European Union summit to avoid further Western sanctions.
The EU has warned it could introduce new sanctions that would target entire sectors of the Russian economy if Moscow fails to help de-escalate the crisis.
He also called on Ukraine to adopt constitutional amendments and other legal changes that would protect the rights of Russian-speakers in the east.
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The cease-fire has been repeatedly broken by sporadic clashes, and it was violated again yesterday when rebels used a shoulder-fired missile to down a Ukrainian military helicopter, killing nine.
The attack, which came after the rebels pledged to respect the cease-fire, prompted Poroshenko to warn that he may end the truce ahead of time.
In April, a mutiny erupted in eastern Ukraine, where pro-Russian insurgents seized official buildings, declared their regions independent and fought government troops.