Document:

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                                                                    EXHIBIT 10.1

                             JUNIPER NETWORKS, INC.
                       2000 NONSTATUTORY STOCK OPTION PLAN
                      (As amended through January 1, 2001)

        1. Purposes of the Plan. The purposes of this Stock Plan are to attract
and retain the best available personnel for positions of substantial
responsibility, to provide additional incentive to Employees and Consultants of
the Company and its Subsidiaries and to promote the success of the Company's
business. All options granted under the Plan shall be Nonstatutory Stock
Options.

        2. Definitions. As used herein, the following definitions shall apply:

           (a) "Administrator" means the Board or any of its Committees
appointed pursuant to Section 4 of the Plan.

           (b) "Applicable Laws" means the legal requirements relating to the
administration of stock option plans under U.S. state corporate laws, U.S.
federal and state securities laws, the Code and the applicable laws of any
foreign country or jurisdiction where Options or Stock Purchase Rights are, or
will be, granted under the Plan.

           (c) "Board" means the Board of Directors of the Company.

           (d) "Code" means the Internal Revenue Code of 1986, as amended.

           (e) "Committee" means a Committee appointed by the Board of Directors
in accordance with Section 4 of the Plan.

           (f) "Common Stock" means the Common Stock of the Company.

           (g) "Company" means Juniper Networks, Inc., a Delaware corporation.

           (h) "Consultant" means any person who is engaged by the Company or
any Parent or Subsidiary to render consulting or advisory services to such
entities.

           (i) "Continuous Status as an Employee or Consultant" means that the
employment or consulting relationship with the Company, any Parent or Subsidiary
is not interrupted or terminated. Continuous Status as an Employee or Consultant
shall not be considered interrupted in the case of (i) any leave of absence
approved by the Company (provided, however, that the Administrator shall be
permitted to stop vesting on any leave of absence, on an individual, aggregate
or policy basis, even if such leave of absence is approved by the Company) or
(ii) transfers between locations of the Company or between the Company, its
Parent, any Subsidiary, or any successor. A leave of absence approved by the
Company shall include sick leave, military leave, or any other personal leave
approved by an authorized representative of the Company.

           (j) "Director" means a member of the Board of Directors of the
Company.

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           (k) "Employee" means any person, including Officers and Directors,
employed by the Company or any Parent or Subsidiary of the Company. The payment
of a Director's fee by the Company shall not be sufficient to constitute
"employment" by the Company.

           (l) "Exchange Act" means the Securities Exchange Act of 1934, as
amended.

           (m) "Fair Market Value" means, as of any date, the value of Common
Stock determined as follows:

               (i) If the Common Stock is listed on any established stock
exchange or a national market system, including without limitation the Nasdaq
National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its
Fair Market Value shall be the closing sales price for such stock (or the
closing bid, if no sales were reported) as quoted on such exchange or system for
the last market trading day prior to the time of determination, as reported in
The Wall Street Journal or such other source as the Administrator deems
reliable;

               (ii) If the Common Stock is regularly quoted by a recognized
securities dealer but selling prices are not reported, its Fair Market Value
shall be the mean between the high bid and low asked prices for the Common Stock
on the last market trading day prior to the day of determination; or

               (iii) In the absence of an established market for the Common
Stock, the Fair Market Value thereof shall be determined in good faith by the
Administrator.

           (n) "Nonstatutory Stock Option" means an Option not intended to
qualify as an incentive stock option within the meaning of Section 422 of the
Code.

           (o) "Officer" means a person who is an officer of the Company within
the meaning of Section 16 of the Exchange Act and the rules and regulations
promulgated thereunder.

           (p) "Option" means a stock option granted pursuant to the Plan.

           (q) "Optioned Stock" means the Common Stock subject to an Option.

           (r) "Optionee" means an Employee or Consultant who receives an
Option.

           (s) "Parent" means a "parent corporation," whether now or hereafter
existing, as defined in Section 424(e) of the Code.

           (t) "Plan" means this 2000 Nonstatutory Stock Option Plan.

           (u) "Section 16(b)" means Section 16(b) of the Securities Exchange
Act of 1934, as amended.

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           (v) "Share" means a share of the Common Stock, as adjusted in
accordance with Section 11 below.

           (w) "Subsidiary" means a "subsidiary corporation," whether now or
hereafter existing, as defined in Section 424(f) of the Code.

        3. Stock Subject to the Plan. Subject to the provisions of Section 11 of
the Plan, the maximum aggregate number of Shares which may be subject to option
and sold under the Plan is 27,904,261 Shares, plus an annual increase to be
added on the first day of the Company's fiscal year equal to the greater of (i)
5,000,000 shares, (ii) 5% of the outstanding shares on such date or (iii) a
lesser amount determined by the Board. The Shares may be authorized but
unissued, or reacquired Common Stock.

           If an Option expires or becomes unexercisable without having been
exercised in full, or is surrendered pursuant to an option exchange program, the
unpurchased Shares which were subject thereto shall become available for future
grant under the Plan (unless the Plan has terminated). However, Shares that have
actually been issued under the Plan upon exercise of an Option shall not be
returned to the Plan and shall not become available for future distribution
under the Plan.

        4. Administration of the Plan.

           (a) Procedure.

               (i) Multiple Administrative Bodies. The Plan may be administered
by different Committees with respect to different groups of Service Providers.

               (ii) Other Administration. Other than as provided above, the Plan
shall be administered by (A) the Board or (B) a Committee, which committee shall
be constituted to satisfy Applicable Laws.

           (b) Powers of the Administrator. Subject to the provisions of the
Plan and, in the case of a Committee, the specific duties delegated by the Board
to such Committee, and subject to the approval of any relevant authorities,
including the approval, if required, of any stock exchange upon which the Common
Stock is listed, the Administrator shall have the authority in its discretion:

               (i) to determine the Fair Market Value of the Common Stock, in
accordance with Section 2(m) of the Plan;

               (ii) to select the Consultants and Employees to whom Options may
from time to time be granted hereunder;

               (iii) to determine whether and to what extent Options are granted
hereunder;

               (iv) to determine the number of Shares to be covered by each such
Option granted hereunder;

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               (v) to approve forms of agreement for use under the Plan;

               (vi) to determine the terms and conditions of any Option granted
hereunder;

               (vii) to determine whether and under what circumstances an Option
may be settled in cash under subsection 9(f) instead of Common Stock;

               (viii) to reduce the exercise price of any Option to the then
current Fair Market Value if the Fair Market Value of the Common Stock covered
by such Option has declined since the date the Option was granted; and

               (ix) to construe and interpret the terms of the Plan and Options
granted pursuant to the Plan.

            (c) Effect of Administrator's Decision. All decisions,
determinations and interpretations of the Administrator shall be final and
binding on all Optionees and any other holders of any Options.

        5. Eligibility.

           (a) Nonstatutory Stock Options may be granted to Employees and
ConsultantsAn Employee or Consultant who has been granted an Option may, if
otherwise eligible, be granted additional Options.

           (b) Neither the Plan nor any Option shall confer upon any Optionee
any right with respect to continuation of his or her employment or consulting
relationship with the Company, nor shall it interfere in any way with his or her
right or the Company's right to terminate his or her employment or consulting
relationship at any time, with or without cause.

           (c) The following limitations shall apply to grants of Options to
Employees:

               (i) No Employee shall be granted, in any fiscal year of the
Company, Options to purchase more than 3,000,000 Shares.

               (ii) In connection with his or her initial employment, an
Employee may be granted Options to purchase up to an additional 6,000,000 Shares
which shall not count against the limit set forth in subsection (i) above.

               (iii) The foregoing limitations shall be adjusted proportionately
in connection with any change in the Company's capitalization as described in
Section 11.

               (iv) If an Option is cancelled in the same fiscal year of the
Company in which it was granted (other than in connection with a transaction
described in Section 11), the cancelled Option shall be counted against the
limit set forth in subsection (i) above. For this purpose, if the exercise price
of an Option is reduced, such reduction will be treated as a cancellation of the
Option and the grant of a new Option.

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        6. Term of Plan. The Plan shall become effective upon its adoption by
the Board of Directors. It shall continue in effect for a term of ten (10) years
unless sooner terminated under Section 14 of the Plan.

        7. Term of Option. The term of each Option shall be the term stated in
the Option Agreement; provided, however, that the term shall be no more than ten
(10) years from the date of grant thereof.

        8. Option Exercise Price and Consideration.

           (a) The per share exercise price for the Shares to be issued upon
exercise of an Option shall be such price as is determined by the Administrator.

           (b) The consideration to be paid for the Shares to be issued upon
exercise of an Option, including he method of payment, shall be determined by
the Administrator. Such consideration may consist of (1) cash, (2) check, (3)
promissory note, (4) other Shares which (x) in the case of Shares acquired upon
exercise of an Option, have been owned by the Optionee for more than six months
on the date of surrender, and (y) have a Fair Market Value on the date of
surrender equal to the aggregate exercise price of the Shares as to which such
Option shall be exercised, (5) delivery of a properly executed exercise notice
together with such other documentation as the Administrator and a broker, if
applicable, shall require to effect an exercise of the Option and delivery to
the Company of the sale or loan proceeds required to pay the exercise price, (6)
any other consideration permitted by applicable law, or (7) any combination of
the foregoing methods of payment. In making its determination as to the type of
consideration to accept, the Administrator shall consider if acceptance of such
consideration may be reasonably expected to benefit the Company.

        9. Exercise of Option.

           (a) Procedure for Exercise; Rights as a Stockholder. Any Option
granted hereunder shall be exercisable at such times and under such conditions
as determined by the Administrator, and as shall be permissible under the terms
of the Plan.

        An Option may not be exercised for a fraction of a Share.

        An Option shall be deemed to be exercised when written notice of such
exercise has been given to the Company in accordance with the terms of the
Option by the person entitled to exercise the Option and full payment for the
Shares with respect to which the Option is exercised has been received by the
Company. Full payment may, as authorized by the Administrator, consist of any
consideration and method of payment allowable under Section 8(b) hereof. Until
the issuance (as evidenced by the appropriate entry on the books of the Company
or of a duly authorized transfer agent of the Company) of the stock certificate
evidencing such Shares, no right to vote, receive dividends or any other rights
as a stockholder shall exist with respect to the Optioned Stock, notwithstanding
the exercise of the Option. The Company shall issue (or cause to be issued) such
stock certificate promptly upon exercise of the Option. No adjustment shall be
made for a dividend

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or other right for which the record date is prior to the date the stock
certificate is issued, except as provided in Section 11 hereof.

               Exercise of an Option in any manner shall result in a decrease in
the number of Shares which thereafter may be available, both for purposes of the
Plan and for sale under the Option, by the number of Shares as to which the
Option is exercised.

           (b) Termination of Employment or Consulting Relationship. In the
event of termination of an Optionee's Continuous Status as an Employee or
Consultant (but not in the event of an Optionee's change of status from Employee
to Consultant, such Optionee may, but only within such period of time as is
determined by the Administrator (and in no event later than the expiration date
of the term of such Option as set forth in the Option Agreement), exercise his
or her Option to the extent that the Optionee was entitled to exercise it at the
date of such termination. To the extent that the Optionee was not entitled to
exercise the Option at the date of such termination, or if the Optionee does not
exercise such Option to the extent so entitled within the time specified herein,
the Option shall terminate.

           (c) Disability of Optionee. In the event of termination of an
Optionee's Continuous Status as an Employee or Consultant as a result of his or
her disability, the Optionee may, but only within ninety (90) days from the date
of such termination (and in no event later than the expiration date of the term
of such Option as set forth in the Option Agreement), exercise the Option to the
extent otherwise entitled to exercise it at the date of such termination. To the
extent that the Optionee was not entitled to exercise the Option at the date of
termination, or if the Optionee does not exercise such Option to the extent so
entitled within the time specified herein, the Option shall terminate, and the
Shares covered by such Option shall revert to the Plan.

           (d) Death of Optionee. In the event of the death of an Optionee, the
Option may be exercised at any time within ninety (90) days following the date
of death (but in no event later than the expiration of the term of such Option
as set forth in the Notice of Grant) by the Optionee's estate or by a person who
acquired the right to exercise the Option by bequest or inheritance, but only to
the extent that the Optionee was entitled to exercise the Option on the date of
death. If, at the time of death, the Optionee was not entitled to exercise his
or her entire Option, the Shares covered by the unexercisable portion of the
Option shall immediately revert to the Plan. If, after the Optionee's death, the
Optionee's estate or a person who acquires the right to exercise the Option by
bequest or inheritance does not exercise the Option within the time specified
herein, the Option shall terminate, and the Shares covered by such Option shall
revert to the Plan.

           (e) Buyout Provisions. The Administrator may at any time offer to buy
out for a payment in cash or Shares, an Option previously granted, based on such
terms and conditions as the Administrator shall establish and communicate to the
Optionee at the time that such offer is made.

        10. Non-Transferability of Options. Options may not be sold, pledged,
assigned, hypothecated, transferred, or disposed of in any manner other than by
will or by the laws of descent or distribution and may be exercised, during the
lifetime of the Optionee, only by the Optionee.

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        11. Adjustments Upon Changes in Capitalization or Merger.

            (a) Changes in Capitalization. Subject to any required action by the
stockholders of the Company, the number of shares of Common Stock covered by
each outstanding Option, and the number of shares of Common Stock which have
been authorized for issuance under the Plan but as to which no Options have yet
been granted or which have been returned to the Plan upon cancellation or
expiration of an Option, as well as the price per share of Common Stock covered
by each such outstanding Option, shall be proportionately adjusted for any
increase or decrease in the number of issued shares of Common Stock resulting
from a stock split, reverse stock split, stock dividend, combination or
reclassification of the Common Stock, or any other increase or decrease in the
number of issued shares of Common Stock effected without receipt of
consideration by the Company. The conversion of any convertible securities of
the Company shall not be deemed to have been "effected without receipt of
consideration." Such adjustment shall be made by the Board, whose determination
in that respect shall be final, binding and conclusive. Except as expressly
provided herein, no issuance by the Company of shares of stock of any class, or
securities convertible into shares of stock of any class, shall affect, and no
adjustment by reason thereof shall be made with respect to, the number or price
of shares of Common Stock subject to an Option.

            (b) Dissolution or Liquidation. In the event of the proposed
dissolution or liquidation of the Company, the Administrator shall notify the
Optionee at least fifteen (15) days prior to such proposed action. To the extent
it has not been previously exercised, the Option shall terminate immediately
prior to the consummation of such proposed action.

            (c) Merger. In the event of a merger of the Company with or into
another corporation, each outstanding Option may be assumed or an equivalent
option may be substituted by such successor corporation or a parent or
subsidiary of such successor corporation. If, in such event, an Option is not
assumed or substituted, the Option shall terminate as of the date of the closing
of the merger. For the purposes of this paragraph, the Option shall be
considered assumed if, following the merger, the Option the right to purchase or
receive, for each Share of Optioned Stock subject to the Option immediately
prior to the merger, the consideration (whether stock, cash, or other securities
or property) received in the merger by holders of Common Stock for each Share
held on the effective date of the transaction (and if the holders are offered a
choice of consideration, the type of consideration chosen by the holders of a
majority of the outstanding Shares). If such consideration received in the
merger is not solely common stock of the successor corporation or its Parent,
the Administrator may, with the consent of the successor corporation, provide
for the consideration to be received upon the exercise of the Option, for each
Share of Optioned Stock subject to the Option, to be solely common stock of the
successor corporation or its Parent equal in fair market value to the per share
consideration received by holders of Common Stock in the merger.

        12. Time of Granting Options. The date of grant of an Option shall, for
all purposes, be the date on which the Administrator makes the determination
granting such Option, or such other date as is determined by the Administrator.
Notice of the determination shall be given to each Employee or Consultant to
whom an Option is so granted within a reasonable time after the date of such
grant.

        13. Amendment and Termination of the Plan.

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            (a) Amendment and Termination. The Board may at any time amend,
alter, suspend or discontinue the Plan, but no amendment, alteration, suspension
or discontinuation shall be made which would impair the rights of any Optionee
under any grant theretofore made, without his or her consent.

            (b) Effect of Amendment or Termination. Any such amendment or
termination of the Plan shall not affect Options already granted, and such
Options shall remain in full force and effect as if this Plan had not been
amended or terminated, unless mutually agreed otherwise between the Optionee and
the Administrator, which agreement must be in writing and signed by the Optionee
and the Company.

        14. Conditions Upon Issuance of Shares. Shares shall not be issued
pursuant to the exercise of an Option unless the exercise of such Option and the
issuance and delivery of such Shares pursuant thereto shall comply with all
relevant provisions of law, including, without limitation, the Securities Act of
1933, as amended, the Exchange Act, the rules and regulations promulgated
thereunder, and the requirements of any stock exchange upon which the Shares may
then be listed, and shall be further subject to the approval of counsel for the
Company with respect to such compliance.

            As a condition to the exercise of an Option, the Company may require
the person exercising such Option to represent and warrant at the time of any
such exercise that the Shares are being purchased only for investment and
without any present intention to sell or distribute such Shares if, in the
opinion of counsel for the Company, such a representation is required by any of
the aforementioned relevant provisions of law.

        15. Reservation of Shares. The Company, during the term of this Plan,
shall at all times reserve and keep available such number of Shares as shall be
sufficient to satisfy the requirements of the Plan.

            The inability of the Company to obtain authority from any regulatory
body having jurisdiction, which authority is deemed by the Company's counsel to
be necessary to the lawful issuance and sale of any Shares hereunder, shall
relieve the Company of any liability in respect of the failure to issue or sell
such Shares as to which such requisite authority shall not have been obtained.

        16. Agreements. Options shall be evidenced by written agreements in such
form as the Administrator shall approve from time to time.

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                                                                   EXHIBIT 10.1

                             JUNIPER NETWORKS, INC.

                        1999 EMPLOYEE STOCK PURCHASE PLAN
                      (AS AMENDED THROUGH JANUARY 1, 2001)

        1. Purpose. The purpose of the Plan is to provide employees of the
Company and its Designated Subsidiaries with an opportunity to purchase Common
Stock of the Company through accumulated payroll deductions. It is the intention
of the Company to have the Plan qualify as an "Employee Stock Purchase Plan"
under Section 423 of the Internal Revenue Code of 1986, as amended. The
provisions of the Plan, accordingly, shall be construed so as to extend and
limit participation in a manner consistent with the requirements of that section
of the Code.

        2. Definitions.

           (a) "Board" shall mean the Board of Directors of the Company.

           (b) "Code" shall mean the Internal Revenue Code of 1986, as amended.

           (c) "Common Stock" shall mean the Common Stock of the Company.

           (d) "Company" shall mean Juniper Networks, Inc., and any Designated
Subsidiary of the Company.

           (e) "Compensation" shall mean all base straight time gross earnings
and commissions, exclusive of payments for overtime, shift premium, incentive
compensation, incentive payments, bonuses, sales commission, and other
compensation.

           (f) "Designated Subsidiary" shall mean any Subsidiary which has been
designated by the Board from time to time in its sole discretion as eligible to
participate in the Plan.

           (g) "Employee" shall mean any individual who is an Employee of the
Company for tax purposes whose customary employment with the Company is at least
twenty (20) hours per week and more than five (5) months in any calendar year.
For purposes of the Plan, the employment relationship shall be treated as
continuing intact while the individual is on sick leave or other leave of
absence approved by the Company. Where the period of leave exceeds 90 days and
the individual's right to reemployment is not guaranteed either by statute or by
contract, the employment relationship shall be deemed to have terminated on the
91st day of such leave.

           (h) "Enrollment Date" shall mean the first day of each Offering
Period.

           (i) "Exercise Date" shall mean the last day of each Offering Period.

           (j) "Fair Market Value" shall mean, as of any date, the value of
Common Stock determined as follows:

               (i) If the Common Stock is listed on any established stock
exchange or a national market system, including without limitation the Nasdaq
National Market or The Nasdaq SmallCap Market of The Nasdaq Stock Market, its
Fair Market Value shall be the closing sales price for such stock (or the
closing bid, if no sales were reported) as quoted on such exchange or system for
the last market trading day on the date of such determination, as reported in
The Wall Street Journal or such other source as the Board deems reliable; or

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               (ii) If the Common Stock is regularly quoted by a recognized
securities dealer but selling prices are not reported, its Fair Market Value
shall be the mean of the closing bid and asked prices for the Common Stock on
the date of such determination, as reported in The Wall Street Journal or such
other source as the Board deems reliable; or

               (iii) In the absence of an established market for the Common
Stock, the Fair Market Value thereof shall be determined in good faith by the
Board; or

               (iv) For purposes of the Enrollment Date of the first Offering
Period under the Plan, the Fair Market Value shall be the initial price to the
public as set forth in the final prospectus included within the registration
statement in Form S-1 filed with the Securities and Exchange Commission for the
initial public offering of the Company's Common Stock (the "Registration
Statement").

           (k) "Offering Period" shall mean a period of approximately six (6)
months during which an option granted pursuant to the Plan may be exercised,
commencing on the first Trading Day on or after February 1 and terminating on
the last Trading Day in the period ending the following July 31, or commencing
on the first Trading Day on or after August 1 and terminating on the last
Trading Day in the period ending the following January 31; provided, however,
that the first Offering Period under the Plan shall commence with the first
Trading Day on or after the date on which the Securities and Exchange Commission
declares the Company's Registration Statement effective and ending on the last
Trading Day on or before July 31, 2000 and the second Offering Period shall
commence with the first Trading Day on or after February 1, 2000 and ending on
the last Trading Day on or before July 31, 2000. The duration of Offering
Periods may be changed pursuant to Section 4 of this Plan.

           (l) "Plan" shall mean this Employee Stock Purchase Plan.

           (m) "Purchase Price" shall mean an amount equal to 85% of the Fair
Market Value of a share of Common Stock on the Enrollment Date or on the
Exercise Date, whichever is lower; provided, however, that the Purchase Price
may be adjusted by the Board pursuant to Section 20.

           (n) "Reserves" shall mean the number of shares of Common Stock
covered by each option under the Plan which have not yet been exercised and the
number of shares of Common Stock which have been authorized for issuance under
the Plan but not yet placed under option.

           (o) "Subsidiary" shall mean a corporation, domestic or foreign, of
which not less than 50% of the voting shares are held by the Company or a
Subsidiary, whether or not such corporation now exists or is hereafter organized
or acquired by the Company or a Subsidiary.

           (p) "Trading Day" shall mean a day on which national stock exchanges
and the Nasdaq System are open for trading.

        3. Eligibility.

           (a) Any Employee who shall be employed by the Company on a given
Enrollment Date shall be eligible to participate in the Plan.

           (b) Any provisions of the Plan to the contrary notwithstanding, no
Employee shall be granted an option under the Plan (i) to the extent that,
immediately after the grant, such Employee (or any other

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person whose stock would be attributed to such Employee pursuant to Section
424(d) of the Code) would own capital stock of the Company and/or hold
outstanding options to purchase such stock possessing five percent (5%) or more
of the total combined voting power or value of all classes of the capital stock
of the Company or of any Subsidiary, or (ii) to the extent that his or her
rights to purchase stock under all employee stock purchase plans of the Company
and its subsidiaries accrues at a rate which exceeds Twenty-Five Thousand
Dollars ($25,000) worth of stock (determined at the fair market value of the
shares at the time such option is granted) for each calendar year in which such
option is outstanding at any time.

        4. Offering Periods. The Plan shall be implemented by consecutive
Offering Periods with a new Offering Period commencing on the first Trading Day
on or after February 1 and August 1 each year, or on such other date as the
Board shall determine, and continuing thereafter until terminated in accordance
with Section 20 hereof; provided, however, that the first Offering Period under
the Plan shall commence with the first Trading Day on or after the date on which
the Securities and Exchange Commission declares the Company's Registration
Statement effective and ending on the last Trading Day on or before July 31,
2000 and the second Offering Period shall commence with the first Trading Day on
or after February 1, 2000 and ending on the last Trading Day on or before July
31, 2000. The Board shall have the power to change the duration of Offering
Periods (including the commencement dates thereof) with respect to future
offerings without stockholder approval if such change is announced at least five
(5) days prior to the scheduled beginning of the first Offering Period to be
affected thereafter.

        5. Participation.

           (a) An eligible Employee may become a participant in the Plan by
completing a subscription agreement authorizing payroll deductions in the form
of Exhibit A to this Plan and filing it with the Company's payroll office on or
prior to the applicable Enrollment Date.

           (b) Payroll deductions for a participant shall commence on the first
payroll following the Enrollment Date and shall end on the last payroll in the
Offering Period to which such authorization is applicable, unless sooner
terminated by the participant as provided in Section 10 hereof.

       6. Payroll Deductions.

           (a) At the time a participant files his or her subscription
agreement, he or she shall elect to have payroll deductions made on each pay day
during the Offering Period in an amount not exceeding ten percent (10%) of the
Compensation which he or she receives on each pay day during the Offering
Period.

           (b) All payroll deductions made for a participant shall be credited
to his or her account under the Plan and shall be withheld in whole percentages
only. A participant may not make any additional payments into such account.

           (c) A participant may discontinue his or her participation in the
Plan as provided in Section 10 hereof, or may increase or decrease the rate of
his or her payroll deductions during the Offering Period by completing or filing
with the Company a new subscription agreement authorizing a change in payroll
deduction rate. The Board may, in its discretion, limit the number of
participation rate changes during any Offering Period. The change in rate shall
be effective with the first full payroll period following five (5) business days
after the Company's receipt of the new subscription agreement. A participant's
subscription

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agreement shall remain in effect for successive Offering Periods unless
terminated as provided in Section 10 hereof.

           (d) Notwithstanding the foregoing, to the extent necessary to comply
with Section 423(b)(8) of the Code and Section 3(b) hereof, a participant's
payroll deductions may be decreased to zero percent (0%) at any time during an
Offering Period. Payroll deductions shall recommence at the rate provided in
such participant's subscription agreement at the beginning of the first Offering
Period which is scheduled to end in the following calendar year, unless
terminated by the participant as provided in Section 10 hereof.

           (e) At the time the option is exercised, in whole or in part, or at
the time some or all of the Company's Common Stock issued under the Plan is
disposed of, the participant must make adequate provision for the Company's
federal, state, or other tax withholding obligations, if any, which arise upon
the exercise of the option or the disposition of the Common Stock. At any time,
the Company may, but shall not be obligated to, withhold from the participant's
compensation the amount necessary for the Company to meet applicable withholding
obligations, including any withholding required to make available to the Company
any tax deductions or benefits attributable to sale or early disposition of
Common Stock by the Employee.

        7. Grant of Option. On the Enrollment Date of each Offering Period, each
eligible Employee participating in such Offering Period shall be granted an
option to purchase on the Exercise Date of such Offering Period (at the
applicable Purchase Price) up to a number of shares of the Company's Common
Stock determined by dividing such Employee's payroll deductions accumulated
prior to such Exercise Date and retained in the Participant's account as of the
Exercise Date by the applicable Purchase Price; provided that in no event shall
an Employee be permitted to purchase during any twelve (12) month period more
than six thousand (6,000) shares (subject to any adjustment pursuant to Section
19), and provided further that such purchase shall be subject to the limitations
set forth in Sections 3(b) and 12 hereof. Exercise of the option shall occur as
provided in Section 8 hereof, unless the participant has withdrawn pursuant to
Section 10 hereof. The Option shall expire on the last day of the Offering
Period.

        8. Exercise of Option. Unless a participant withdraws from the Plan as
provided in Section 10 hereof, his or her option for the purchase of shares
shall be exercised automatically on the Exercise Date, and the maximum number of
full shares subject to option shall be purchased for such participant at the
applicable Purchase Price with the accumulated payroll deductions in his or her
account. No fractional shares shall be purchased; any payroll deductions
accumulated in a participant's account which are not sufficient to purchase a
full share shall be retained in the participant's account for the subsequent
Offering Period, subject to earlier withdrawal by the participant as provided in
Section 10 hereof. Any other monies left over in a participant's account after
the Exercise Date shall be returned to the participant. During a participant's
lifetime, a participant's option to purchase shares hereunder is exercisable
only by him or her.

        9. Delivery. As promptly as practicable after each Exercise Date on
which a purchase of shares occurs, the Company shall arrange the delivery to
each participant, as appropriate, the shares purchased upon exercise of his or
her option.

        10. Withdrawal.

            (a) A participant may withdraw all but not less than all the payroll
deductions credited to his or her account and not yet used to exercise his or
her option under the Plan at any time by giving written notice to the Company in
the form of Exhibit B to this Plan. All of the participant's payroll deductions

                                      -4-
<PAGE>   5

credited to his or her account shall be paid to such participant promptly after
receipt of notice of withdrawal and such participant's option for the Offering
Period shall be automatically terminated, and no further payroll deductions for
the purchase of shares shall be made for such Offering Period. If a participant
withdraws from an Offering Period, payroll deductions shall not resume at the
beginning of the succeeding Offering Period unless the participant delivers to
the Company a new subscription agreement.

            (b) A participant's withdrawal from an Offering Period shall not
have any effect upon his or her eligibility to participate in any similar plan
which may hereafter be adopted by the Company or in succeeding Offering Periods
which commence after the termination of the Offering Period from which the
participant withdraws.

        11. Termination of Employment. Upon a participant's ceasing to be an
Employee for any reason, he or she shall be deemed to have elected to withdraw
from the Plan and the payroll deductions credited to such participant's account
during the Offering Period but not yet used to exercise the option shall be
returned to such participant or, in the case of his or her death, to the person
or persons entitled thereto under Section 15 hereof, and such participant's
option shall be automatically terminated. The preceding sentence
notwithstanding, a participant who receives payment in lieu of notice of
termination of employment shall be treated as continuing to be an Employee for
the participant's customary number of hours per week of employment during the
period in which the participant is subject to such payment in lieu of notice.

        12. Interest. No interest shall accrue on the payroll deductions of a
participant in the Plan.

        13. Stock.

            (a) Subject to adjustment upon changes in capitalization of the
Company as provided in Section 19 hereof, the maximum number of shares of the
Company's Common Stock which shall be made available for sale under the Plan
shall be nine million (9,000,000) shares, plus an annual increase to be added on
the first day of the Company's fiscal year beginning in 2000 equal to the lesser
of (i) 3,000,000 shares, (ii) 1% of the outstanding shares on such date or (iii)
a lesser amount determined by the Board. If, on a given Exercise Date, the
number of shares with respect to which options are to be exercised exceeds the
number of shares then available under the Plan, the Company shall make a pro
rata allocation of the shares remaining available for purchase in as uniform a
manner as shall be practicable and as it shall determine to be equitable.

            (b) The participant shall have no interest or voting right in shares
covered by his option until such option has been exercised.

            (c) Shares to be delivered to a participant under the Plan shall be
registered in the name of the participant or in the name of the participant and
his or her spouse.

        14. Administration. The Plan shall be administered by the Board or a
committee of members of the Board appointed by the Board. The Board or its
committee shall have full and exclusive discretionary authority to construe,
interpret and apply the terms of the Plan, to determine eligibility and to
adjudicate all disputed claims filed under the Plan. Every finding, decision and
determination made by the Board or its committee shall, to the full extent
permitted by law, be final and binding upon all parties.

                                      -5-
<PAGE>   6

        15. Designation of Beneficiary.

            (a) A participant may file a written designation of a beneficiary
who is to receive any shares and cash, if any, from the participant's account
under the Plan in the event of such participant's death subsequent to an
Exercise Date on which the option is exercised but prior to delivery to such
participant of such shares and cash. In addition, a participant may file a
written designation of a beneficiary who is to receive any cash from the
participant's account under the Plan in the event of such participant's death
prior to exercise of the option. If a participant is married and the designated
beneficiary is not the spouse, spousal consent shall be required for such
designation to be effective.

            (b) Such designation of beneficiary may be changed by the
participant at any time by written notice. In the event of the death of a
participant and in the absence of a beneficiary validly designated under the
Plan who is living at the time of such participant's death, the Company shall
deliver such shares and/or cash to the executor or administrator of the estate
of the participant, or if no such executor or administrator has been appointed
(to the knowledge of the Company), the Company, in its discretion, may deliver
such shares and/or cash to the spouse or to any one or more dependents or
relatives of the participant, or if no spouse, dependent or relative is known to
the Company, then to such other person as the Company may designate.

        16. Transferability. Neither payroll deductions credited to a
participant's account nor any rights with regard to the exercise of an option or
to receive shares under the Plan may be assigned, transferred, pledged or
otherwise disposed of in any way (other than by will, the laws of descent and
distribution or as provided in Section 15 hereof) by the participant. Any such
attempt at assignment, transfer, pledge or other disposition shall be without
effect, except that the Company may treat such act as an election to withdraw
funds from an Offering Period in accordance with Section 10 hereof.

        17. Use of Funds. All payroll deductions received or held by the Company
under the Plan may be used by the Company for any corporate purpose, and the
Company shall not be obligated to segregate such payroll deductions.

        18. Reports. Individual accounts shall be maintained for each
participant in the Plan. Statements of account shall be given to participating
Employees at least annually, which statements shall set forth the amounts of
payroll deductions, the Purchase Price, the number of shares purchased and the
remaining cash balance, if any.

        19. Adjustments Upon Changes in Capitalization, Dissolution,
Liquidation, Merger or Asset Sale.

            (a) Changes in Capitalization. Subject to any required action by the
stockholders of the Company, the Reserves, the maximum number of shares each
participant may purchase per Offering Period (pursuant to Section 7), as well as
the price per share and the number of shares of Common Stock covered by each
option under the Plan which has not yet been exercised shall be proportionately
adjusted for any increase or decrease in the number of issued shares of Common
Stock resulting from a stock split, reverse stock split, stock dividend,
combination or reclassification of the Common Stock, or any other increase or
decrease in the number of shares of Common Stock effected without receipt of
consideration by the Company; provided, however, that conversion of any
convertible securities of the Company shall not be deemed to have been "effected
without receipt of consideration". Such adjustment shall be made by the Board,
whose determination in that respect shall be final, binding and conclusive.
Except as expressly provided herein, no

                                      -6-
<PAGE>   7

issuance by the Company of shares of stock of any class, or securities
convertible into shares of stock of any class, shall affect, and no adjustment
by reason thereof shall be made with respect to, the number or price of shares
of Common Stock subject to an option.

            (b) Dissolution or Liquidation. In the event of the proposed
dissolution or liquidation of the Company, the Offering Period then in progress
shall be shortened by setting a new Exercise Date (the "New Exercise Date"), and
shall terminate immediately prior to the consummation of such proposed
dissolution or liquidation, unless provided otherwise by the Board. The New
Exercise Date shall be before the date of the Company's proposed dissolution or
liquidation. The Board shall notify each participant in writing, at least ten
(10) business days prior to the New Exercise Date, that the Exercise Date for
the participant's option has been changed to the New Exercise Date and that the
participant's option shall be exercised automatically on the New Exercise Date,
unless prior to such date the participant has withdrawn from the Offering Period
as provided in Section 10 hereof.

            (c) Merger or Asset Sale. In the event of a proposed sale of all or
substantially all of the assets of the Company, or the merger of the Company
with or into another corporation, each outstanding option shall be assumed or an
equivalent option substituted by the successor corporation or a Parent or
Subsidiary of the successor corporation. In the event that the successor
corporation refuses to assume or substitute for the option, the Offering Period
then in progress shall be shortened by setting a new Exercise Date (the "New
Exercise Date"). The New Exercise Date shall be before the date of the Company's
proposed sale or merger. The Board shall notify each participant in writing, at
least ten (10) business days prior to the New Exercise Date, that the Exercise
Date for the participant's option has been changed to the New Exercise Date and
that the participant's option shall be exercised automatically on the New
Exercise Date, unless prior to such date the participant has withdrawn from the
Offering Period as provided in Section 10 hereof.

        20. Amendment or Termination.

            (a) The Board of Directors of the Company may at any time and for
any reason terminate or amend the Plan. Except as provided in Section 19 hereof,
no such termination can affect options previously granted, provided that an
Offering Period may be terminated by the Board of Directors on any Exercise Date
if the Board determines that the termination of the Offering Period or the Plan
is in the best interests of the Company and its stockholders. Except as provided
in Section 19 and Section 20 hereof, no amendment may make any change in any
option theretofore granted which adversely affects the rights of any
participant. To the extent necessary to comply with Section 423 of the Code (or
any other applicable law, regulation or stock exchange rule), the Company shall
obtain shareholder approval in such a manner and to such a degree as required.

            (b) Without stockholder consent and without regard to whether any
participant rights may be considered to have been "adversely affected," the
Board (or its committee) shall be entitled to change the Offering Periods, limit
the frequency and/or number of changes in the amount withheld during an Offering
Period, establish the exchange ratio applicable to amounts withheld in a
currency other than U.S. dollars, permit payroll withholding in excess of the
amount designated by a participant in order to adjust for delays or mistakes in
the Company's processing of properly completed withholding elections, establish
reasonable waiting and adjustment periods and/or accounting and crediting
procedures to ensure that amounts applied toward the purchase of Common Stock
for each participant properly correspond with amounts withheld from

                                      -7-
<PAGE>   8

the participant's Compensation, and establish such other limitations or
procedures as the Board (or its committee) determines in its sole discretion
advisable which are consistent with the Plan.

            (c) In the event the Board determines that the ongoing operation of
the Plan may result in unfavorable financial accounting consequences, the Board
may, in its discretion and, to the extent necessary or desirable, modify or
amend the Plan to reduce or eliminate such accounting consequence including, but
not limited to:

                  (i) altering the Purchase Price for any Offering Period
including an Offering Period underway at the time of the change in Purchase
Price;

                  (ii) shortening any Offering Period so that Offering Period
ends on a new Exercise Date, including an Offering Period underway at the time
of the Board action; and

                  (iii) allocating shares.

                  Such modifications or amendments shall not require stockholder
approval or the consent of any Plan participants.

        21. Notices. All notices or other communications by a participant to the
Company under or in connection with the Plan shall be deemed to have been duly
given when received in the form specified by the Company at the location, or by
the person, designated by the Company for the receipt thereof.

        22. Conditions Upon Issuance of Shares. Shares shall not be issued with
respect to an option unless the exercise of such option and the issuance and
delivery of such shares pursuant thereto shall comply with all applicable
provisions of law, domestic or foreign, including, without limitation, the
Securities Act of 1933, as amended, the Securities Exchange Act of 1934, as
amended, the rules and regulations promulgated thereunder, and the requirements
of any stock exchange upon which the shares may then be listed, and shall be
further subject to the approval of counsel for the Company with respect to such
compliance.

           As a condition to the exercise of an option, the Company may require
the person exercising such option to represent and warrant at the time of any
such exercise that the shares are being purchased only for investment and
without any present intention to sell or distribute such shares if, in the
opinion of counsel for the Company, such a representation is required by any of
the aforementioned applicable provisions of law.

        23. Term of Plan. The Plan shall become effective upon the earlier to
occur of its adoption by the Board of Directors or its approval by the
stockholders of the Company. It shall continue in effect for a term of ten (10)
years unless sooner terminated under Section 20 hereof.

                                      -8-
<PAGE>   9
                                    EXHIBIT A

                             JUNIPER NETWORKS, INC.

                        1999 EMPLOYEE STOCK PURCHASE PLAN

                             SUBSCRIPTION AGREEMENT

_____ Original Application                     Enrollment Date: _______________
_____ Change in Payroll Deduction Rate
_____ Change of Beneficiary(ies)

1.      _____________________________________ hereby elects to participate in
        the Juniper Networks, Inc., 1999 Employee Stock Purchase Plan (the
        "Employee Stock Purchase Plan") and subscribes to purchase shares of the
        Company's Common Stock in accordance with this Subscription Agreement
        and the Employee Stock Purchase Plan.

2.      I hereby authorize payroll deductions from each paycheck in the amount
        of ____% of my Compensation on each payday (from 1 to 10%) during the
        Offering Period in accordance with the Employee Stock Purchase Plan.
        (Please note that no fractional percentages are permitted.)

3.      I understand that said payroll deductions shall be accumulated for the
        purchase of shares of Common Stock at the applicable Purchase Price
        determined in accordance with the Employee Stock Purchase Plan. I
        understand that if I do not withdraw from an Offering Period, any
        accumulated payroll deductions will be used to automatically exercise my
        option.

4.      I have received a copy of the complete Employee Stock Purchase Plan. I
        understand that my participation in the Employee Stock Purchase Plan is
        in all respects subject to the terms of the Plan. I understand that my
        ability to exercise the option under this Subscription Agreement is
        subject to stockholder approval of the Employee Stock Purchase Plan.

5.      Shares purchased for me under the Employee Stock Purchase Plan should be
        issued in the name(s) of (Employee or Employee and Spouse
        only):____________________________.

6.      I understand that if I dispose of any shares received by me pursuant to
        the Plan within 2 years after the Enrollment Date (the first day of the
        Offering Period during which I purchased such shares), I will be treated
        for federal income tax purposes as having received ordinary income at
        the time of such disposition in an amount equal to the excess of the
        fair market value of the shares at the time such shares were purchased
        by me over the price which I paid for the shares. I hereby agree to
        notify the Company in writing within 30 days after the date of any
        disposition of shares and I will make adequate provision for Federal,
        state or other tax

                                      A-1
<PAGE>   10

        withholding obligations, if any, which arise upon the disposition of the
        Common Stock. The Company may, but will not be obligated to, withhold
        from my compensation the amount necessary to meet any applicable
        withholding obligation including any withholding necessary to make
        available to the Company any tax deductions or benefits attributable to
        sale or early disposition of Common Stock by me. If I dispose of such
        shares at any time after the expiration of the 2-year holding period, I
        understand that I will be treated for federal income tax purposes as
        having received income only at the time of such disposition, and that
        such income will be taxed as ordinary income only to the extent of an
        amount equal to the lesser of (1) the excess of the fair market value of
        the shares at the time of such disposition over the purchase price which
        I paid for the shares, or (2) 15% of the fair market value of the shares
        on the first day of the Offering Period. The remainder of the gain, if
        any, recognized on such disposition will be taxed as capital gain.

7.      I hereby agree to be bound by the terms of the Employee Stock Purchase
        Plan. The effectiveness of this Subscription Agreement is dependent upon
        my eligibility to participate in the Employee Stock Purchase Plan.

8.      In the event of my death, I hereby designate the following as my
        beneficiary(ies) to receive all payments and shares due me under the
        Employee Stock Purchase Plan:

NAME:  (Please print)__________________________________________________________
                          (First)              (Middle)                  (Last)

___________________________                    ________________________________
Relationship

                                               ________________________________

                                               ________________________________
                                               (Address)

Employee's Social
Security Number:                               ________________________________

Employee's Address:                            ________________________________

                                               ________________________________

                                      A-2

<PAGE>   11

I UNDERSTAND THAT THIS SUBSCRIPTION AGREEMENT SHALL REMAIN IN EFFECT THROUGHOUT
SUCCESSIVE OFFERING PERIODS UNLESS TERMINATED BY ME.

Dated: __________________                    __________________________________
                                             Signature of Employee

                                             __________________________________
                                             Spouse's Signature
                                             (If beneficiary other than spouse)

                                      A-3
<PAGE>   12

                                    EXHIBIT B

                             JUNIPER NETWORKS, INC.

                        1999 EMPLOYEE STOCK PURCHASE PLAN

                              NOTICE OF WITHDRAWAL

        The undersigned participant in the Offering Period of the Juniper
Networks, Inc., 1999 Employee Stock Purchase Plan which began on ___________,
______ (the "Enrollment Date") hereby notifies the Company that he or she hereby
withdraws from the Offering Period. He or she hereby directs the Company to pay
to the undersigned as promptly as practicable all the payroll deductions
credited to his or her account with respect to such Offering Period. The
undersigned understands and agrees that his or her option for such Offering
Period will be automatically terminated. The undersigned understands further
that no further payroll deductions will be made for the purchase of shares in
the current Offering Period and the undersigned shall be eligible to participate
in succeeding Offering Periods only by delivering to the Company a new
Subscription Agreement.

                                        Name and Address of Participant:

                                        _______________________________________

                                        _______________________________________

                                        _______________________________________

                                        Signature:

                                        _______________________________________

                                        Date:__________________________________

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