import paramiko
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
try:
    # I figured out the range of IPs seeing the first and the last ones in my lab
    for i in range(***,***):
        ip=str(i)
        # This was my PC itself, hence the check :D
        if(ip!="***"):
            try:
                print '********'+ip
                ssh.connect('********'+ip, username='user',password='******')
                stdin, stdout, stderr = ssh.exec_command("reboot")
            except:
                print "ip not there"
except:
    # The IP might not be available
    error=1