Juniper Networks (JNPR) 10-Q 2015 Q3 Quarterly report

EXHIBIT 12.1

Juniper Networks, Inc.

Statements of Computation of Ratio of Earnings to Fixed Charges
(In millions, except ratios)

	Nine Months Ended			Years Ended December 31,
	9/30/15(*)			2014(*)			2013(*)			2012(*)			2011(*)			2010(*)
Earnings for computation of ratio:
Pre-tax income (loss) from continuing operations before adjustment for noncontrolling interests in consolidated subsidiaries or income from equity investees	$	591.3		$	(86.3	)	$	518.4		$	266.0		$	572.0		$	769.5
Fixed charges	73.5			83.3			76.1			72.0			69.2			16.8
Amortization of capitalized interest	0.6			0.5			0.4			—			—			—
Less:
Interest capitalized	(1.5		)	(2.7		)	(1.9		)	(7.1		)	(1.2		)	—
Noncontrolling interest in pre-tax income   of subsidiaries that have not incurred   fixed charges	—			—			—			—			—			(1.3		)
Total earnings (loss)	$	663.9		$	(5.2	)	$	593.0		$	330.9		$	640.0		$	785.0
Fixed charges:
Interest expense	$	60.9		$	66.0		$	58.1		$	52.2		$	48.9		$	—
Interest capitalized	1.5			2.7			1.9			—			—			—
Amortized premiums, discounts, and   capitalized expenses relating to   indebtedness	1.1			0.8			0.3			0.8			0.6			—
Estimate of interest within rental expense	10.0			13.8			15.8			19.0			19.7			16.8
Total fixed charges	$	73.5		$	83.3		$	76.1		$	72.0		$	69.2		$	16.8
Ratio of earnings (loss) to fixed charges	9.0			(0.1		)	7.8			4.6			9.2			46.8

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^(*)  For these ratios, "earnings" represents income (loss) before taxes before adjustment for noncontrolling interests in equity investments and fixed charges, adjusted for interest capitalized and noncontrolling interest in pre-tax income (loss) of subsidiaries that have not incurred fixed charges.