Exhibit 12.1

Juniper Networks, Inc.

Statements of Computation of Ratio of Earnings to Fixed Charges

(In millions, except ratios)

	Six Months Ended June 30,			Years Ended December 31,
	2016(*)			2015(*)			2014(*)			2013(*)			2012(*)			2011(*)
Earnings for computation of ratio:
Income (loss) before income taxes and before adjustment for noncontrolling interests in consolidated subsidiaries or income from equity investees	$	318.7		$	852.2		$	(86.3	)	$	518.4		$	266.0		$	572.0
Plus:
Fixed charges		53.7			98.5			83.3			76.1			72.0			69.2
Amortization of capitalized interest		0.6			0.8			0.5			0.4			—			—
Less:
Interest capitalized		(0.3	)		(2.2	)		(2.7	)		(1.9	)		(7.1	)		(1.2	)
Total earnings (loss)	$	372.7		$	949.3		$	(5.2	)	$	593.0		$	330.9		$	640.0
Fixed charges:
Interest expense	$	46.6		$	81.9		$	66.0		$	58.1		$	52.2		$	48.9
Interest capitalized		0.3			2.2			2.7			1.9			—			—
Amortized premiums, discounts, and capitalized expenses relating to indebtedness		0.9			1.4			0.8			0.3			0.8			0.6
Estimate of interest within rental expense		5.9			13.0			13.8			15.8			19.0			19.7
Total fixed charges	$	53.7		$	98.5		$	83.3		$	76.1		$	72.0		$	69.2
Ratio of earnings (loss) to fixed charges		6.9x			9.6x			(0.1)x			7.8x			4.6x			9.2x

^(*)  For this ratio, both “earnings” and “fixed charges” conform to the calculation required by Item 503(d) of Regulation S-K.