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                                                                     EXHIBIT 1.1

                             JUNIPER NETWORKS, INC.

                                  COMMON STOCK

                                 -------------

                             UNDERWRITING AGREEMENT

                                                              ____________, 1999

Goldman, Sachs & Co.
Credit Suisse First Boston Corporation
BancBoston Robertson Stephens Inc.
Dain Rauscher Wessels, a division of Dain Rauscher Incorporated
SG Cowen Securities Corporation
Warburg Dillon Read LLC
   As representatives of the several Underwriters
     named in Schedule I hereto,
c/o Goldman, Sachs & Co.
85 Broad Street
New York, New York 10004

Ladies and Gentlemen:

        Juniper Networks, Inc., a Delaware corporation (the "Company"),
proposes, subject to the terms and conditions stated herein, to issue and sell
to the Underwriters named in Schedule I hereto (the "Underwriters") an aggregate
of 1,500,000 shares and, at the election of the Underwriters, up to 272,564
additional shares of Common Stock ("Stock") of the Company, and the stockholders
of the Company named in Schedule II hereto (the "Selling Stockholders") propose,
subject to the terms and conditions stated herein, to sell to the Underwriters
an aggregate of 3,500,000 shares and, at the election of the Underwriters, up to
477,436 additional shares of Stock. The aggregate of 5,000,000 shares to be sold
by the Company and the Selling Stockholders is herein called the "Firm Shares"
and the aggregate of 750,000 additional shares to be sold by the Company and the
Selling Stockholders is herein called the "Optional Shares". The Firm Shares and
the Optional Shares that the Underwriters elect to purchase pursuant to Section
2 hereof are herein collectively called the "Shares".

        1.
              (a) The Company represents and warrants to, and agrees with, each
        of the Underwriters that:

                    (i) A registration statement on Form S-1 (File No. 333-____)
        (the "Initial Registration Statement") in respect of the Shares has been
        filed with the Securities and Exchange Commission (the "Commission");
        the Initial Registration Statement and any post-effective amendment
        thereto, each in the form heretofore delivered to you, and, excluding
        exhibits thereto, to you for each of the other Underwriters, have been
        declared effective by the Commission in such form; other than a
        registration statement, if any, increasing the size of the offering (a
        "Rule 462(b) Registration Statement"), filed pursuant to Rule 462(b)
        under the Securities Act of 1933, as amended (the "Act"), which became
        effective upon filing, no other document with respect to the Initial
        Registration Statement has heretofore been filed by the Company with the
        Commission; and to the



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        Company's knowledge, no stop order suspending the effectiveness of the
        Initial Registration Statement, any post-effective amendment thereto or
        the Rule 462(b) Registration Statement, if any, has been issued and to
        the Company's knowledge, no proceeding for that purpose has been
        initiated or threatened by the Commission (any preliminary prospectus
        included in the Initial Registration Statement or filed with the
        Commission pursuant to Rule 424(a) of the rules and regulations of the
        Commission under the Act is hereinafter called a "Preliminary
        Prospectus"; the various parts of the Initial Registration Statement and
        the Rule 462(b) Registration Statement, if any, including all exhibits
        thereto and including the information contained in the form of final
        prospectus filed with the Commission pursuant to Rule 424(b) under the
        Act in accordance with Section 5(a) hereof and deemed by virtue of Rule
        430A under the Act to be part of the Initial Registration Statement at
        the time it was declared effective, each as amended at the time such
        part of the Initial Registration Statement became effective or such part
        of the Rule 462(b) Registration Statement, if any, became or hereafter
        becomes effective, are hereinafter collectively called the "Registration
        Statement"; and such final prospectus, in the form first filed pursuant
        to Rule 424(b) under the Act, is hereinafter called the "Prospectus";

                (ii) No order preventing or suspending the use of any
        Preliminary Prospectus has been issued by the Commission, and each
        Preliminary Prospectus, at the time of filing thereof, conformed in all
        material respects to the requirements of the Act and the rules and
        regulations of the Commission thereunder, and did not contain an untrue
        statement of a material fact or omit to state a material fact required
        to be stated therein or necessary to make the statements therein, in the
        light of the circumstances under which they were made, not misleading;
        provided, however, that this representation and warranty shall not apply
        to any statements or omissions made in reliance upon and in conformity
        with information furnished in writing to the Company by an Underwriter
        through Goldman, Sachs & Co. expressly for use therein or by a Selling
        Stockholder expressly for use therein;

                (iii) The Registration Statement conforms, and the Prospectus
        and any further amendments or supplements to the Registration Statement
        or the Prospectus will conform, in all material respects to the
        requirements of the Act and the rules and regulations of the Commission
        thereunder and do not and will not, as of the applicable effective date
        as to the Registration Statement and any amendment thereto and as of the
        applicable filing date as to the Prospectus and any amendment or
        supplement thereto, contain an untrue statement of a material fact or
        omit to state a material fact required to be stated therein or necessary
        to make the statements therein not misleading; provided, however, that
        this representation and warranty shall not apply to any statements or
        omissions made in reliance upon and in conformity with information
        furnished in writing to the Company by an Underwriter through Goldman,
        Sachs & Co. expressly for use therein or by a Selling Stockholder
        expressly for use therein;

                (iv) Neither the Company nor any of its subsidiaries has
        sustained since the date of the latest audited financial statements
        included in the Prospectus any material loss or interference with its
        business from fire, explosion, flood or other calamity, whether or not
        covered by insurance, or from any labor dispute or court or governmental
        action, order or decree, otherwise than as set forth or contemplated in
        the Prospectus; and, since the respective dates as of which information
        is given in the Registration Statement and the Prospectus through the
        date hereof, there has not been any change in the authorized capital
        stock, or long-term debt (except such changes in long-term debt as do
        not exceed $500,000) of the Company or any of its subsidiaries, or any
        change in



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        the net current assets, stockholders' equity, net sales or net loss
        except if such change would not have a Material Adverse Effect (as
        defined below), or any development which the Company reasonably expects
        to cause a Material Adverse Effect (as defined below), otherwise than as
        set forth or contemplated in the Prospectus;

                (v) The Company and its subsidiaries have good and marketable
        title in fee simple to all real property owned by them and good and
        marketable title to all personal property owned by them, in each case
        free and clear of all liens, encumbrances and defects except such as are
        described in the Prospectus or such as do not materially affect the
        value of such property and do not materially interfere with the use made
        and proposed to be made of such property by the Company and its
        subsidiaries; and any real property and buildings held under lease by
        the Company and its subsidiaries are held by them under valid,
        subsisting and enforceable leases with such exceptions as are not
        material and do not interfere with the use made and proposed to be made
        of such property and buildings by the Company and its subsidiaries;

                (vi) The Company has been duly incorporated and is validly
        existing as a corporation in good standing under the laws of the State
        of Delaware with power and authority (corporate and other) to own its
        properties and conduct its business as described in the Prospectus, and
        has been duly qualified as a foreign corporation for the transaction of
        business and is in good standing under the laws of each other
        jurisdiction in which it owns or leases properties or conducts any
        business so as to require such qualification, or except where the
        failure to be so qualified would not have a material adverse effect on
        the business, results of operations or financial condition of the
        Company and subsidiaries taken as a whole (a "Material Adverse Effect");
        and each subsidiary of the Company has been duly incorporated and is
        validly existing as a corporation in good standing under the laws of its
        jurisdiction of incorporation;

                (vii) The Company has an authorized capitalization as set forth
        in the Prospectus, and all of the issued shares of capital stock of the
        Company have been duly and validly authorized and issued, are fully paid
        and non-assessable and conform in all material respects to the
        description of the Stock contained in the Prospectus; and all of the
        issued shares of capital stock of each subsidiary of the Company have
        been duly and validly authorized and issued, are fully paid and
        non-assessable and (except for directors' qualifying shares) are owned
        directly or indirectly by the Company, free and clear of all liens,
        encumbrances, equities or claims;

                (viii) The unissued Shares to be issued and sold by the Company
        to the Underwriters hereunder have been duly and validly authorized and,
        when issued and delivered against payment therefor as provided herein,
        will be duly and validly issued and fully paid and non-assessable and
        will conform in all material respects to the description of the Stock
        contained in the Prospectus;

                (ix) The issue and sale of the Shares to be sold by the Company
        and the compliance by the Company with all of the provisions of this
        Agreement and the consummation of the transactions herein contemplated
        will not conflict with or result in a breach or violation of any of the
        terms or provisions of, or constitute a default under, any material
        indenture, mortgage, deed of trust, loan agreement or other agreement or
        instrument to which the Company or any of its subsidiaries is a party or
        by which the Company or any of its subsidiaries is bound or to which any
        of the property or assets of the Company or any of its subsidiaries is
        subject, nor will such action result in any violation of the provisions
        of the Certificate of Incorporation or By-laws of the Company



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        or, to the Company's knowledge, any statute or any order, rule or
        regulation of any court or governmental agency or body having
        jurisdiction over the Company or any of its subsidiaries or any of their
        properties except where such breach, or violation could not reasonably
        be expected to have a Material Adverse Effect; and no consent, approval,
        authorization, order, registration or qualification of or with any such
        court or governmental agency or body is required for the issue and sale
        of the Shares or the consummation by the Company of the transactions
        contemplated by this Agreement, except the registration under the Act of
        the Shares and such consents, approvals, authorizations, registrations
        or qualifications as may be required under state securities or Blue Sky
        laws in connection with the purchase and distribution of the Shares by
        the Underwriters;

                (x) None of the Company's subsidiaries is a "significant
        subsidiary" as that term is defined in Rule 1-02(w) of Regulation S-X.
        Neither the Company nor any of its subsidiaries is in violation of its
        Certificate of Incorporation or By-laws or in default in the performance
        or observance of any material obligation, agreement, covenant or
        condition contained in any material indenture, mortgage, deed of trust,
        loan agreement, lease or other agreement or instrument to which it is a
        party or by which it or any of its properties may be bound;

                (xi) The statements set forth in the Prospectus under the
        caption "Description of Capital Stock" insofar as they purport to
        constitute a summary of the terms of the Stock and under the caption
        "Underwriting", insofar as they purport to describe the provisions of
        the laws and documents referred to therein, are accurate and complete in
        all material respects;

                (xii) Other than as set forth in the Prospectus, there are no
        legal or governmental proceedings pending to which the Company or any of
        its subsidiaries is a party or of which any property of the Company or
        any of its subsidiaries is the subject which, if determined adversely to
        the Company or any of its subsidiaries, would individually or in the
        aggregate have a Material Adverse Effect on the current or future
        consolidated financial position, stockholders' equity or results of
        operations of the Company and its subsidiaries; and, to the Company's
        knowledge, no such proceedings are threatened or contemplated by
        governmental authorities or threatened by others;

                (xiii) The Company is not and, after giving effect to the
        offering and sale of the Shares, will not be an "investment company", as
        such term is defined in the Investment Company Act of 1940, as amended
        (the "Investment Company Act");

                (xiv) Neither the Company nor any of its affiliates does
        business with the government of Cuba or with any person or affiliate
        located in Cuba within the meaning of Section 517.075, Florida Statutes;

                (xv) Ernst & Young LLP, who have certified certain financial
        statements of the Company and its subsidiaries, are independent public
        accountants as required by the Act and the rules and regulations of the
        Commission thereunder;

                (xvi) The Company has initiated a review of its operations and
        those of its subsidiaries to evaluate the extent to which the business
        or operations of the Company or any of its subsidiaries will be affected
        by the Year 2000 Problem. Although we have not completed our assessment,
        as a result of such review conducted to date, the Company has no reason
        to believe, and does not believe, that the Year 2000 Problem



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        will have a Material Adverse Effect. The "Year 2000 Problem" as used
        herein means any significant risk that computer hardware or software
        used in the receipt, transmission, processing, manipulation, storage,
        retrieval, retransmission or other utilization of data or in the
        operation of mechanical or electrical systems of any kind will not, in
        the case of dates or time periods occurring after December 31, 1999,
        function at least as effectively as in the case of dates or time periods
        occurring prior to January 1, 2000;

                (xvii) The Company owns, or possesses adequate rights to use,
        all material patents necessary for the conduct of its business: to the
        Company's knowledge, no valid United States patent is or would be
        infringed by the activities of the Company, except as would not have a
        material adverse effect on the business, financial condition, results of
        operations or prospects of the Company; there are no actions, suits or
        judicial proceedings pending relating to patents or proprietary
        information to which the Company is a party or of which any property of
        the Company is subject, and, to the knowledge of the Company, no
        actions, suits or judicial proceedings are threatened by governmental
        authorities or, except as set forth in the Prospectus, others, in each
        case except as would not result in any Material Adverse Effect, or, to
        the Company's knowledge, in any development which the Company reasonably
        expects to cause a Material Adverse Effect. The Company is not aware of
        any claim by others that the Company is infringing or otherwise
        violating the patents or other intellectual property of others and is
        not aware of any rights of third parties to any of the Company's patent
        applications, licensed patents or licenses which could affect materially
        the use thereof by the Company; and

                (xviii) The Company does not own any real property.

        (b) Each of the Selling Stockholders severally represents and warrants
to, and agrees with, each of the Underwriters and the Company that:

                (i) All consents, approvals, authorizations and orders necessary
        for the execution and delivery by such Selling Stockholder of this
        Agreement and the Power of Attorney and the Custody Agreement
        hereinafter referred to, and for the sale and delivery of the Shares to
        be sold by such Selling Stockholder hereunder, have been obtained; and
        such Selling Stockholder has full right, power and authority to enter
        into this Agreement, the Power-of-Attorney and the Custody Agreement and
        to sell, assign, transfer and deliver the Shares to be sold by such
        Selling Stockholder hereunder;

                (ii) The sale of the Shares to be sold by such Selling
        Stockholder hereunder and the compliance by such Selling Stockholder
        with all of the provisions of this Agreement, the Power of Attorney and
        the Custody Agreement and the consummation of the transactions herein
        and therein contemplated will not, to the knowledge of such Selling
        Stockholder, conflict with or result in a breach or violation of any of
        the terms or provisions of, or constitute a default under, any statute,
        or any material indenture, mortgage, deed of trust, loan agreement or
        other material agreement or instrument to which such Selling Stockholder
        is a party or by which such Selling Stockholder is bound or to which any
        of the property or assets of such Selling Stockholder is subject, nor
        will such action result in any violation of the provisions of the
        Certificate of Incorporation or By-laws of such Selling Stockholder if
        such Selling Stockholder is a corporation, the Partnership Agreement of
        such Selling Stockholder if such Selling Stockholder is a partnership
        or, to the knowledge of such Selling Stockholder, any order, rule or
        regulation of any court or governmental agency or body having
        jurisdiction over such Selling Stockholder or the property of such
        Selling Stockholder, except in each case as



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        would not adversely affect the ability of the Selling Stockholder to
        consummate the transactions contemplated by this Agreement;

                (iii) Such Selling Stockholder has, and immediately prior to
        each Time of Delivery (as defined in Section 4 hereof) such Selling
        Stockholder will have, good and valid title to the Shares to be sold by
        such Selling Stockholder hereunder, free and clear of all liens,
        encumbrances, equities or claims for which such Selling Stockholder has
        received notice; and, assuming the Underwriters purchased the Shares to
        be sold by such Selling Stockholder for value, in good faith and without
        notice of any adverse claims within the meaning of the Uniform
        Commercial Code, good and valid title to such Shares, free and clear of
        all liens, encumbrances, equities or claims, will pass to the several
        Underwriters;

                (iv) During the period beginning from the date hereof and
        continuing to and including the date 90 days after the date of the
        Prospectus, not to offer, sell, contract to sell or otherwise dispose
        of, except as provided hereunder, any securities of the Company that are
        substantially similar to the Shares, including but not limited to any
        securities that are convertible into or exchangeable for, or that
        represent the right to receive, Stock or any such substantially similar
        securities (other than pursuant to employee stock option plans existing
        on, or upon the conversion or exchange of convertible or exchangeable
        securities outstanding as of, the date of this Agreement), without your
        prior written consent;

                (v) Such Selling Stockholder has not taken and will not take,
        directly or indirectly, any action which is designed to or which has
        constituted or which might reasonably be expected to cause or result in
        stabilization or manipulation of the price of any security of the
        Company to facilitate the sale or resale of the Shares;

                (vi) To the extent that any statements or omissions made in the
        Registration Statement, any Preliminary Prospectus, the Prospectus or
        any amendment or supplement thereto are made in reliance upon and in
        conformity with written information furnished to the Company by such
        Selling Stockholder expressly for use therein, such Preliminary
        Prospectus and the Registration Statement did, and the Prospectus and
        any further amendments or supplements to the Registration Statement and
        the Prospectus, when they become effective or are filed with the
        Commission, as the case may be, will conform in all material respects to
        the requirements of the Act and the rules and regulations of the
        Commission thereunder and will not contain any untrue statement of a
        material fact or omit to state any material fact required to be stated
        therein or necessary to make the statements therein not misleading;

                (vii) In order to document the Underwriters' compliance with the
        reporting and withholding provisions of the Tax Equity and Fiscal
        Responsibility Act of 1982 with respect to the transactions herein
        contemplated, such Selling Stockholder will deliver to you prior to or
        at the First Time of Delivery (as hereinafter defined) a properly
        completed and executed United States Treasury Department Form W-9 (or
        other applicable form or statement specified by Treasury Department
        regulations in lieu thereof);

                (viii) Certificates in negotiable form representing the Shares
        to be sold by such Selling Stockholder hereunder have been placed in
        custody under a Custody Agreement, in the form heretofore furnished to
        you (the "Custody Agreement"), duly executed and delivered by such
        Selling Stockholder to Norwest Bank Minnesota, N.A., as custodian (the
        "Custodian"), and such Selling Stockholder has duly executed and



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        delivered a Power of Attorney, in the form heretofore furnished to you
        (the "Power of Attorney"), appointing the persons indicated in Schedule
        II hereto, and each of them, as such Selling Stockholder's
        attorneys-in-fact (the "Attorneys-in-Fact") with authority to execute
        and deliver this Agreement on behalf of such Selling Stockholder, to
        determine the purchase price to be paid by the Underwriters to the
        Selling Stockholders as provided in Section 2 hereof, to authorize the
        delivery of the Shares to be sold by such Selling Stockholder hereunder
        and otherwise to act on behalf of such Selling Stockholder in connection
        with the transactions contemplated by this Agreement and the Custody
        Agreement; and

                (ix) The Shares represented by the certificates held in custody
        for such Selling Stockholder under the Custody Agreement and
        representing all of the Shares to be sold by such Selling Stockholder
        hereunder are subject to the interests of the Underwriters hereunder;
        the arrangements made by such Selling Stockholder for such custody, and
        the appointment by such Selling Stockholder of the Attorneys-in-Fact by
        the Power of Attorney, are to that extent irrevocable; the obligations
        of the Selling Stockholders hereunder shall not be terminated by
        operation of law, whether by the death or incapacity of any individual
        Selling Stockholder or, in the case of an estate or trust, by the death
        or incapacity of any executor or trustee or the termination of such
        estate or trust, or in the case of a partnership or corporation, by the
        dissolution of such partnership or corporation, or by the occurrence of
        any other event; if any individual Selling Stockholder or any such
        executor or trustee should die or become incapacitated, or if any such
        estate or trust should be terminated, or if any such partnership or
        corporation should be dissolved, or if any other such event should
        occur, before the delivery of the Shares hereunder, certificates
        representing the Shares shall be delivered by or on behalf of the
        Selling Stockholders in accordance with the terms and conditions of this
        Agreement and of the Custody Agreements; and actions taken by the
        Attorneys-in-Fact pursuant to the Powers of Attorney shall be as valid
        as if such death, incapacity, termination, dissolution or other event
        had not occurred, regardless of whether or not the Custodian, the
        Attorneys-in-Fact, or any of them, shall have received notice of such
        death, incapacity, termination, dissolution or other event.

        2. Subject to the terms and conditions herein set forth, (a) the Company
and each of the Selling Stockholders agree, severally and not jointly, to sell
to each of the Underwriters, and each of the Underwriters agrees, severally and
not jointly, to purchase from the Company and each of the Selling Stockholders,
at a purchase price per share of $_____, the number of Firm Shares (to be
adjusted by you so as to eliminate fractional shares) determined by multiplying
the aggregate number of Firm Shares to be sold by the Company and each of the
Selling Stockholders as set forth opposite their respective names in Schedule II
hereto by a fraction, the numerator of which is the aggregate number of Firm
Shares to be purchased by such Underwriter as set forth opposite the name of
such Underwriter in Schedule I hereto and the denominator of which is the
aggregate number of Firm Shares to be purchased by all of the Underwriters from
the Company and all of the Selling Stockholders hereunder and (b) in the event
and to the extent that the Underwriters shall exercise the election to purchase
Optional Shares as provided below, each of the Selling Stockholders agrees,
severally and not jointly, to sell to each of the Underwriters, and each of the
Underwriters agrees, severally and not jointly, to purchase from each of the
Selling Stockholders, at the purchase price per share set forth in clause (a) of
this Section 2, that portion of the number of Optional Shares as to which such
election shall have been exercised (to be adjusted by you so as to eliminate
fractional shares) determined by multiplying such number of Optional Shares by a
fraction the numerator of which is the maximum number of Optional Shares which
such Underwriter is entitled to purchase as set forth opposite the name of such
Underwriter in Schedule I hereto and the denominator of



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which is the maximum number of Optional Shares that all of the Underwriters are
entitled to purchase hereunder.

        The Company and the Selling Stockholders, as and to the extent indicated
in Schedule II hereto, hereby grant, severally and not jointly, to the
Underwriters the right to purchase at their election up to 750,000 Optional
Shares, at the purchase price per share set forth in the paragraph above, for
the sole purpose of covering overallotments in the sale of the Firm Shares. Any
such election to purchase Optional Shares shall be made in proportion to the
maximum number of Optional Shares to be sold by the Company and each Selling
Stockholder as set forth in Schedule II hereto. Any such election to purchase
Optional Shares may be exercised only by written notice from you to the Company
and the Attorneys-in-Fact, given within a period of 30 calendar days after the
date of this Agreement and setting forth the aggregate number of Optional Shares
to be purchased and the date on which such Optional Shares are to be delivered,
as determined by you but in no event earlier than the First Time of Delivery (as
defined in Section 4 hereof) or, unless you and the Attorneys-in-Fact otherwise
agree in writing, earlier than two or later than ten business days after the
date of such notice.

        3. Upon the authorization by you of the release of the Firm Shares, the
several Underwriters propose to offer the Firm Shares for sale upon the terms
and conditions set forth in the Prospectus.

        4. (a) The Shares to be purchased by each Underwriter hereunder, in
definitive form, and in such authorized denominations and registered in such
names as Goldman, Sachs & Co. may request upon at least forty-eight hours' prior
notice to the Company and the Selling Stockholders shall be delivered by or on
behalf of the Company and the Selling Stockholders to Goldman, Sachs & Co.,
through the facilities of the Depository Trust Company ("DTC"), for the account
of such Underwriter, against payment by or on behalf of such Underwriter of the
purchase price therefor by wire transfer payable in the case of the Shares to be
purchased from the Company to the order of the Company and in the case of the
Shares to be purchased from the Selling Stockholders, to the order of the
Custodian in Federal (same-day) funds to the account specified by the Company
and the Custodian, to Goldman, Sachs & Co. at least forty-eight hours in
advance. The Company will cause the certificates representing the Shares to be
made available for checking and packaging at least twenty-four hours prior to
the Time of Delivery (as defined below) with respect thereto at the office of
DTC or its designated custodian (the "Designated Office"). The time and date of
such delivery and payment shall be, with respect to the Firm Shares, 10:00 a.m.,
New York time, on ___________, 1999 or such other time and date as Goldman,
Sachs & Co., the Company and the Selling Stockholders may agree upon in writing,
and, with respect to the Optional Shares, 10:00 a.m., New York time, on the date
specified by Goldman, Sachs & Co. in the written notice given by Goldman, Sachs
& Co. of the Underwriters' election to purchase such Optional Shares, or such
other time and date as Goldman, Sachs & Co. and, the Company and the Selling
Stockholders may agree upon in writing. Such time and date for delivery of the
Firm Shares is herein called the "First Time of Delivery", such time and date
for delivery of the Optional Shares, if not the First Time of Delivery, is
herein called the "Second Time of Delivery", and each such time and date for
delivery is herein called a "Time of Delivery".

        (b) The documents to be delivered at each Time of Delivery by or on
behalf of the parties hereto pursuant to Section 7 hereof, including the cross
receipt for the Shares and any additional documents requested by the
Underwriters pursuant to Section 7(k) hereof, will be delivered at the offices
of Wilson Sonsini Goodrich & Rosati, Professional Corporation, 650 Page Mill
Road, Palo Alto, CA 94303 (the "Closing Location"), and the Shares will be
delivered at the Designated Office, all at such Time of Delivery. A meeting will
be held at the Closing



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Location at ______ p.m., New York City time, on the New York Business Day next
preceding such Time of Delivery, at which meeting the final drafts of the
documents to be delivered pursuant to the preceding sentence will be available
for review by the parties hereto. For the purposes of this Section 4, "New York
Business Day" shall mean each Monday, Tuesday, Wednesday, Thursday and Friday
which is not a day on which banking institutions in New York are generally
authorized or obligated by law or executive order to close.

        5. The Company agrees with each of the Underwriters:

        (a) To prepare the Prospectus in a form approved by you and to file such
Prospectus pursuant to Rule 424(b) under the Act not later than the Commission's
close of business on the second business day following the execution and
delivery of this Agreement, or, if applicable, such earlier time as may be
required by Rule 430A(a)(3) under the Act; to make no further amendment or any
supplement to the Registration Statement or Prospectus which shall be
disapproved by you promptly after reasonable notice thereof; to advise you,
promptly after it receives notice thereof, of the time when any amendment to the
Registration Statement has been filed or becomes effective or any supplement to
the Prospectus or any amended Prospectus has been filed and to furnish you with
copies thereof; to advise you, promptly after it receives notice thereof, of the
issuance by the Commission of any stop order or of any order preventing or
suspending the use of any Preliminary Prospectus or prospectus, of the
suspension of the qualification of the Shares for offering or sale in any
jurisdiction, of the initiation or threatening of any proceeding for any such
purpose, or of any request by the Commission for the amending or supplementing
of the Registration Statement or Prospectus or for additional information; and,
in the event of the issuance of any stop order or of any order preventing or
suspending the use of any Preliminary Prospectus or prospectus or suspending any
such qualification, promptly to use its best efforts to obtain the withdrawal of
such order;

        (b) Promptly from time to time to take such action as you may reasonably
request to qualify the Shares for offering and sale under the securities laws of
such jurisdictions as you may request and to comply with such laws so as to
permit the continuance of sales and dealings therein in such jurisdictions for
as long as may be necessary to complete the distribution of the Shares, provided
that in connection therewith the Company shall not be required to qualify as a
foreign corporation or to file a general consent to service of process in any
jurisdiction;

        (c) Prior to 10:00 A.M., New York City time, on the New York Business
Day next succeeding the date of this Agreement and from time to time, to furnish
the Underwriters with copies of the Prospectus in New York City in such
quantities as you may reasonably request, and, if the delivery of a prospectus
is required at any time prior to the expiration of the earlier of nine months
after the time of issue of the Prospectus in connection with the offering or
sale of the Shares or the date the distribution of the Shares is completed, and
if at such time any events shall have occurred as a result of which the
Prospectus as then amended or supplemented would include an untrue statement of
a material fact or omit to state any material fact necessary in order to make
the statements therein, in the light of the circumstances under which they were
made when such Prospectus is delivered, not misleading, or, if for any other
reason it shall be necessary during such period to amend or supplement the
Prospectus in order to comply with the Act; to notify you and upon your request;
to prepare and furnish without charge to each Underwriter and to any dealer in
securities as many copies as you may from time to time reasonably request of an
amended Prospectus or a supplement to the Prospectus which will correct such
statement or omission or effect such compliance, and in case any Underwriter is
required to deliver a prospectus in connection with sales of any of the Shares
through the earlier of nine months or the date the distribution of the Shares is
completed, upon



                                       9
   10

your request but at the expense of such Underwriter, to prepare and deliver to
such Underwriter as many copies as you may request of an amended or supplemented
Prospectus complying with Section 10(a)(3) of the Act;

        (d) To make generally available to its securityholders as soon as
practicable, but in any event not later than eighteen months after the effective
date of the Registration Statement (as defined in Rule 158(c) under the Act), an
earnings statement of the Company and its subsidiaries (which need not be
audited) complying with Section 11(a) of the Act and the rules and regulations
of the Commission thereunder (including, at the option of the Company, Rule
158);

        (e) During the period beginning from the date hereof and continuing to
and including the date 90 days after the date of the Prospectus, not to offer,
sell, contract to sell or otherwise dispose of, except as provided hereunder,
any securities of the Company that are substantially similar to the Shares,
including but not limited to any securities that are convertible into or
exchangeable for, or that represent the right to receive, Stock or any such
substantially similar securities (other than pursuant to employee stock option
plans and employee stock purchase plans existing on, or upon the conversion or
exchange of convertible or exchangeable securities or the exercise of warrants
outstanding as of, the date of this Agreement), without your prior written
consent or pursuant to an acquisition transaction, provided, however, that any
recipient of securities of the Company pursuant to such an acquisition
transaction agrees to receive and hold such securities subject to the provisions
of Subsection 1(b)(iv) hereof;

        (f) To furnish to its stockholders as soon as practicable after the end
of each fiscal year an annual report (including a balance sheet and statements
of income, stockholders' equity and cash flows of the Company and its
consolidated subsidiaries certified by independent public accountants) and, as
soon as practicable after the end of each of the first three quarters of each
fiscal year (beginning with the fiscal quarter ending after the effective date
of the Registration Statement), to make available to its stockholders
consolidated summary financial information of the Company and its subsidiaries
for such quarter in reasonable detail;

        (g) During a period of five years from the effective date of the
Registration Statement, to furnish to you copies of all reports or other
communications (financial or other) furnished to stockholders, and to deliver to
you as soon as they are available, copies of any reports and financial
statements furnished to or filed with the Commission or any national securities
exchange on which any class of securities of the Company is listed;

        (h) To use the net proceeds received by it from the sale of the Shares
pursuant to this Agreement in the manner specified in the Prospectus under the
caption "Use of Proceeds";

        (i) To use its best efforts to list for quotation the Shares on the
Nasdaq National Market ("Nasdaq"); and

        (j) If the Company elects to rely upon Rule 462(b), the Company shall
file a Rule 462(b) Registration Statement with the Commission in compliance with
Rule 462(b) by 10:00 P.M., Washington, D.C. time, on the date of this Agreement,
and the Company shall at the time of filing either pay to the Commission the
filing fee for the Rule 462(b) Registration Statement or give irrevocable
instructions for the payment of such fee pursuant to Rule 111(b) under the Act.

        6. The Company and each of the Selling Stockholders covenant and agree
with one another and with the several Underwriters that (a) the Company will
pay, and such Selling Stockholder will cause to be paid by the Company, the
following: (i) the fees, disbursements and



                                       10
   11

expenses of the Company's counsel and accountants in connection with the
registration of the Shares under the Act and all other expenses in connection
with the preparation, printing and filing of the Registration Statement, any
Preliminary Prospectus and the Prospectus and amendments and supplements thereto
and the mailing and delivering of copies thereof to the Underwriters and
dealers; (ii) the cost of printing or producing any Agreement among
Underwriters, this Agreement, the Blue Sky Memorandum, closing documents and any
other documents in connection with the offering, purchase, sale and delivery of
the Shares; (iii) all expenses in connection with the qualification of the
Shares for offering and sale under state securities laws as provided in Section
5(b) hereof, including the fees and disbursements of counsel for the
Underwriters in connection with such qualification and in connection with the
Blue Sky survey (iv) all fees and expenses in connection with listing the Shares
on Nasdaq and (v) the filing fees incident to securing any required review by
the National Association of Securities Dealers, Inc. of the terms of the sale of
the Shares; (vi) the cost of preparing stock certificates; (vii) the cost and
charges of any transfer agent or registrar and (viii) all other costs and
expenses incident to the performance of its obligations hereunder which are not
otherwise specifically provided for in this Section; and (b) such Selling
Stockholder will pay or cause to be paid all costs and expenses incident to the
performance of such Selling Stockholder's obligations hereunder which are not
otherwise specifically provided for in this Section, including (i) any fees and
expenses of counsel for such Selling Stockholder, and (ii) all expenses and
taxes incident to the sale and delivery of the Shares to be sold by such Selling
Stockholder to the Underwriters hereunder. It is understood, however, that the
Company shall bear, and the Selling Stockholders shall not be required to pay or
to reimburse the Company for the cost of any other matters not directly related
to the sale and purchase of the Shares pursuant to this Agreement, and that
except as provided in this Section, and Sections 8 and 11 hereof, the
Underwriters will pay all of their own costs and expenses, including the fees of
their counsel, stock transfer taxes on resale of any of the Shares by them, and
any advertising expenses connected with any offers they may make.

        7. The obligations of the Underwriters hereunder, as to the Shares to be
delivered at each Time of Delivery, shall be subject, in their discretion, to
the condition that all representations and warranties and other statements of
the Company and of the Selling Stockholders herein are, at and as of such Time
of Delivery, true and correct, the condition that the Company and the Selling
Stockholders shall have performed all of its and their obligations hereunder
theretofore to be performed, and the following additional conditions:

        (a) The Prospectus shall have been filed with the Commission pursuant to
Rule 424(b) within the applicable time period prescribed for such filing by the
rules and regulations under the Act and in accordance with Section 5(a) hereof;
if the Company has elected to rely upon Rule 462(b), the Rule 462(b)
Registration Statement shall have become effective by 10:00 P.M., Washington,
D.C. time, on the date of this Agreement; no stop order suspending the
effectiveness of the Registration Statement or any part thereof shall have been
issued and no proceeding for that purpose shall have been initiated or
threatened by the Commission; and all requests for additional information on the
part of the Commission shall have been complied with to your reasonable
satisfaction;

        (b) Brobeck, Phleger & Harrison, LLP, counsel for the Underwriters,
shall have furnished to you such written opinion or opinions (a draft of each
such opinion is attached as Annex II(a) hereto), dated such Time of Delivery,
with respect to the matters covered in paragraphs (i), (ii), (vii), (xi) and
(xiii) of subsection (c) below as well as such other related matters as you may
reasonably request, and such counsel shall have received such papers and
information as they may reasonably request to enable them to pass upon such
matters;



                                       11
   12

        (c) Wilson Sonsini Goodrich & Rosati, counsel for the Company, shall
have furnished to you their written opinion (a draft of such opinion is attached
as Annex II(b) hereto), dated such Time of Delivery, in form and substance
satisfactory to you, to the effect that:

                (i) The Company has been duly incorporated and is validly
        existing as a corporation in good standing under the laws of the State
        of Delaware with power and authority (corporate and other) to own its
        properties and conduct its business as described in the Prospectus;

                (ii) The Company has an authorized capitalization as set forth
        in the Prospectus, and all of the issued shares of capital stock of the
        Company (including the Shares being delivered at such Time of Delivery)
        have been duly and validly authorized and issued and are fully paid and
        non-assessable; and the Shares conform to the description of the Stock
        contained in the Prospectus;

                (iii) The Company has been duly qualified as a foreign
        corporation for the transaction of business and is in good standing
        under the laws of each other jurisdiction in which it owns or leases
        properties or conducts any business so as to require such qualification,
        except where the failure to be so qualified would not have a Material
        Adverse Effect (such counsel being entitled to rely in respect of the
        opinion in this clause upon opinions of local counsel and in respect of
        matters of fact upon certificates of officers of the Company, provided
        that such counsel shall state that they believe that both you and they
        are justified in relying upon such opinions and certificates);

                (iv) Each subsidiary of the Company has been duly incorporated
        and is validly existing as a corporation in good standing under the laws
        of its jurisdiction of incorporation; and all of the issued shares of
        capital stock of each such subsidiary have been duly and validly
        authorized and issued, are fully paid and non-assessable, and (except
        for directors' qualifying shares ) are owned directly or indirectly by
        the Company, free and clear of all liens, encumbrances, equities or
        claims (such counsel being entitled to rely in respect of the opinion in
        this clause upon opinions of local counsel and in respect of matters of
        fact upon certificates of officers of the Company or its subsidiaries,
        provided that such counsel shall state that they believe that both you
        and they are justified in relying upon such opinions and certificates);

                (v) Any real property and buildings held under lease by the
        Company and its subsidiaries are held by them under valid, subsisting
        and enforceable leases with such exceptions as are not material and do
        not interfere with the use made and proposed to be made of such property
        and buildings by the Company and its subsidiaries (in giving the opinion
        in this clause, such counsel may state that upon opinions of local
        counsel and abstracts, reports and policies of title companies rendered
        or issued at or subsequent to the time of acquisition of such property
        by the Company or its subsidiaries, upon opinions of counsel to the
        lessors of such property and, in respect of matters of fact, upon
        certificates of officers of the Company or its subsidiaries, provided
        that such counsel shall state that they believe that both you and they
        are justified in relying upon such opinions, abstracts, reports,
        policies and certificates);

                (vi) To such counsel's knowledge, there are no legal or
        governmental proceedings pending or threatened against the Company of a
        character required to be disclosed in the Registration Statement or
        Prospectus by the Act or the rules and regulations of the Commission
        thereunder, other than those described therein;



                                       12
   13

                (vii) This Agreement has been duly authorized, executed and
        delivered by the Company;

                (viii) The issue and sale of the Shares being delivered at such
        Time of Delivery to be sold by the Company and the compliance by the
        Company with all of the provisions of this Agreement and the
        consummation of the transactions herein contemplated will not conflict
        with or result in a breach or violation of any of the terms or
        provisions of, or constitute a default under, any material agreement of
        the Company filed as an exhibit to the Registration Statement pursuant
        to Item 601 of Regulation S-K, nor will such action result in any
        violation of the provisions of the Certificate of Incorporation or
        By-laws of the Company or any statute or any order, rule or regulation
        known to such counsel of any court or governmental agency or body having
        jurisdiction over the Company or any of its subsidiaries or any of their
        properties which would have a Material Adverse Effect;

                (ix) No consent, approval, authorization, order, registration or
        qualification of or with any such court or governmental agency or body
        is required for the issue and sale of the Shares or the consummation by
        the Company of the transactions contemplated by this Agreement, except
        the registration under the Act of the Shares, and such consents,
        approvals, authorizations, registrations or qualifications as may be
        required under state securities or Blue Sky laws in connection with the
        purchase and distribution of the Shares by the Underwriters;

                (x) To such counsel's knowledge, neither the Company nor any of
        its subsidiaries is in violation of its Certificate of Incorporation or
        By-laws;

                (xi) The statements set forth in the Prospectus under the
        caption "Description of Capital Stock", insofar as they purport to
        constitute a summary of the terms of the Stock, are accurate, complete
        and fair in all material respects;

                (xii) The Company is not an "investment company", as such term
        is defined in the Investment Company Act; and

                (xiii) The Registration Statement and the Prospectus and any
        further amendments and supplements thereto made by the Company prior to
        such Time of Delivery (other than the financial statements and related
        schedules and financial data therein, as to which such counsel need
        express no opinion) comply as to form in all material respects with the
        requirements of the Act and the rules and regulations thereunder;
        although they do not assume any responsibility for the accuracy,
        completeness or fairness of the statements contained in the Registration
        Statement or the Prospectus, except for those referred to in the opinion
        in subsection (xi) of this Section 7(c), they have no reason to believe
        that, as of its effective date, the Registration Statement or any
        further amendment thereto made by the Company prior to such Time of
        Delivery (other than the financial statements and related schedules and
        financial data therein, as to which such counsel need express no
        opinion) contained an untrue statement of a material fact or omitted to
        state a material fact required to be stated therein or necessary to make
        the statements therein not misleading or that, as of its date, the
        Prospectus or any further amendment or supplement thereto made by the
        Company prior to such Time of Delivery (other than the financial
        statements and related schedules therein, as to which such counsel need
        express no opinion) contained an untrue statement of a material fact or
        omitted to state a material fact necessary to make the statements
        therein, in the light of the circumstances under which they were made,



                                       13
   14

        not misleading or that, as of such Time of Delivery, either the
        Registration Statement or the Prospectus or any further amendment or
        supplement thereto made by the Company prior to such Time of Delivery
        (other than the financial statements and related schedules and financial
        data therein, as to which such counsel need express no opinion) contains
        an untrue statement of a material fact or omits to state a material fact
        necessary to make the statements therein, in the light of the
        circumstances under which they were made, not misleading; and they do
        not know of any amendment to the Registration Statement required to be
        filed or of any contracts or other documents of a character required to
        be filed as an exhibit to the Registration Statement or required to be
        described in the Registration Statement or the Prospectus which are not
        filed or described as required;

        (d) Fish & Richardson P.C., patent counsel for the Company, shall have
furnished to you their written opinion (a draft of such opinion is attached as
Annex II(c) hereto), dated such Time of Delivery, in form and substance
satisfactory to you, to the effect that:

                (i) The Company is listed in the records of the United States
        Patent and Trademark Office as the holder of record of the patents
        listed on a schedule to such opinion (the "Patents") and each of the
        applications listed on a schedule to such opinion (the "Applications").
        To the knowledge of such counsel, there are no claims of third parties
        to any ownership interest or lien with respect to any of the Patents or
        Applications. Such counsel is not aware of any material defect in form
        in the preparation or filing of the Applications on behalf of the
        Company. To the knowledge of such counsel, the Applications are being
        pursued by the Company. To the knowledge of such counsel, the Company
        owns as its sole property the Patents and pending Applications;

                (ii) The Company is listed in the records of the appropriate
        foreign offices as the sole holder of record of the foreign patents
        listed on a schedule to such opinion (the "Foreign Patents") and each of
        the applications listed on a schedule to such opinion (the "Foreign
        Applications"). Such counsel knows of no claims of third parties to any
        ownership interest or lien with respect to the Foreign Patents or
        Foreign Applications. Such counsel is not aware of any material defect
        of form in the preparation or filing of the Foreign Applications on
        behalf of the Company. To the knowledge of such counsel, the Foreign
        Applications are being pursued by the Company. To the knowledge of such
        counsel, the Company owns as its sole property the Foreign Patents and
        pending Foreign Applications;

                (iii) Such counsel knows of no reason why the Patents or Foreign
        Patents are not valid as issued. Such counsel has no knowledge of any
        reason why any patent to be issued as a result of any Application or
        Foreign Application would not be valid or would not afford the Company
        useful patent protection with respect thereto;

                (iv) As to the statements under the captions "Risk Factors -- We
        rely on our intellectual property rights and may be unable to protect
        those rights" and "Business -- Intellectual Property," nothing has come
        to the attention of such counsel which caused them to believe that the
        above-mentioned sections of the Registration Statement, at the time the
        Registration Statement became effective and at all times subsequent
        thereto up to and on the Closing Date and on any later date on which the
        Optional Shares are to be, as the case may be, the above-mentioned
        sections of the Registration Statement, Prospectus and any amendment or
        supplement thereto made available and reviewed by such counsel contained
        any untrue statement of a material fact or omitted to state a material
        fact required to be stated therein or necessary to make the statements
        therein, in light of the circumstances under which they were made, not
        misleading; and



                                       14
   15

                (v) Such counsel knows of no material action, suit, claim or
        proceeding relating to patents, patent rights or licenses, trademarks or
        trademark rights, copyrights, collaborative research, licenses or
        royalty arrangements or agreements or trade secrets, know-how or
        proprietary techniques, including processes and substances, owned by or
        affecting the business or operations of the Company which are pending or
        threatened against the Company or any of its officers or directors.

        (e) The respective counsel for each of the Selling Stockholders, as
indicated in Schedule II hereto, each shall have furnished to you their written
opinion with respect to each of the Selling Stockholders for whom they are
acting as counsel (a draft of each such opinion is attached as Annex II(d)
hereto), dated such Time of Delivery, in form and substance satisfactory to you,
to the effect that:

                (i) A Power-of-Attorney and a Custody Agreement have been duly
        executed and delivered by such Selling Stockholder and constitute valid
        and binding agreements of such Selling Stockholder in accordance with
        their terms;

                (ii) This Agreement has been duly executed and delivered by or
        on behalf of such Selling Stockholder; and the sale of the Shares to be
        sold by such Selling Stockholder hereunder and the compliance by such
        Selling Stockholder with all of the provisions of this Agreement, the
        Power-of-Attorney and the Custody Agreement and the consummation of the
        transactions herein and therein contemplated will not conflict with or
        result in any violation of the provisions of the Certificate of
        Incorporation or By-laws of such Selling Stockholder if such Selling
        Stockholder is a corporation, the Partnership Agreement of such Selling
        Stockholder if such Selling Stockholder is a partnership or, to such
        counsel's knowledge, any material statute, order, rule or regulation
        known to such counsel of any court or governmental agency or body having
        jurisdiction over such Selling Stockholder or the property of such
        Selling Stockholder, except in each case as would not adversely affect
        the ability of such Selling Stockholder to consummate the transactions
        contemplated by this Agreement;

                (iii) To such counsel's knowledge, no consent, approval,
        authorization or order of any court or governmental agency or body is
        required for the consummation of the transactions contemplated by this
        Agreement in connection with the Shares to be sold by such Selling
        Stockholder hereunder, except registration under the Act of the Shares
        and such consents, approvals, authorizations, registrations or
        qualifications as may be required under state securities or Blue Sky
        laws in connection with the purchase and distribution of such Shares by
        the Underwriters;

                (iv) To such counsel's knowledge, immediately prior to such Time
        of Delivery, such Selling Stockholder had good and valid title to the
        Shares to be sold at such Time of Delivery by such Selling Stockholder
        under this Agreement, free and clear of all liens, encumbrances,
        equities or claims, and full corporate right, power and authority to
        sell, assign, transfer and deliver the Shares to be sold by such Selling
        Stockholder hereunder; and

                (v) Good and valid title to such Shares, free and clear of all
        liens, encumbrances, equities or claims, will be transferred to each of
        the several Underwriters assuming that each such Underwriter purchases
        such Shares for value, in good faith and without notice of any such
        lien, encumbrance, equity or claim or any other adverse claim within the
        meaning of the Uniform Commercial Code.



                                       15
   16

        In rendering the opinion in paragraph (iv), such counsel may rely upon a
certificate of such Selling Stockholder in respect of matters of fact such
ownership of, and liens, encumbrances, equities or claims on, the Shares sold by
such Selling Stockholder, provided that such counsel shall state that they
believe that both you and they are justified in relying upon such certificate;

        (f) On the date of the Prospectus at a time prior to the execution of
this Agreement, at 9:30 a.m., New York City time, on the effective date of any
post-effective amendment to the Registration Statement filed subsequent to the
date of this Agreement and also at each Time of Delivery, Ernst & Young LLP
shall have furnished to you a letter or letters, dated the respective dates of
delivery thereof, in form and substance satisfactory to you, to the effect set
forth in Annex I hereto (the executed copy of the letter delivered prior to the
execution of this Agreement is attached as Annex I(a) hereto and a draft of the
form of letter to be delivered on the effective date of any post-effective
amendment to the Registration Statement and as of each Time of Delivery is
attached as Annex I(b) hereto).

        (g) (i) Neither the Company nor any of its subsidiaries shall have
sustained since the date of the latest audited financial statements included in
the Prospectus any loss or interference with its business from fire, explosion,
flood or other calamity, whether or not covered by insurance, or from any labor
dispute or court or governmental action, order or decree, otherwise than as set
forth or contemplated in the Prospectus, and (ii) since the respective dates as
of which information is given in the Prospectus there shall not have been any
change in the capital stock, net current assets, stockholders' equity, net
sales, net loss or long-term debt of the Company or any of its subsidiaries or
any change, or any development involving a prospective change, in or affecting
the general affairs, management, financial position, stockholders' equity or
results of operations of the Company and its subsidiaries, otherwise than as set
forth or contemplated in the Prospectus, the effect of which, in any such case
described in clause (i) or (ii), is in the reasonable judgment of the
Representatives so material and adverse as to make it impracticable or
inadvisable to proceed with the public offering or the delivery of the Shares
being delivered at such Time of Delivery on the terms and in the manner
contemplated in the Prospectus;

        (h) On or after the date hereof there shall not have occurred any of the
following: (i) a suspension or material limitation in trading in securities
generally on the New York Stock Exchange or on Nasdaq; (ii) a suspension or
material limitation in trading in the Company's securities on Nasdaq; (iii) a
general moratorium on commercial banking activities declared by either Federal
or New York or California State authorities; or (iv) the outbreak or escalation
of hostilities involving the United States or the declaration by the United
States of a national emergency or war, if the effect of any such event specified
in this clause (iv) in the judgment of the Representatives makes it
impracticable or inadvisable to proceed with the public offering or the delivery
of the Shares being delivered at such Time of Delivery on the terms and in the
manner contemplated in the Prospectus;

        (i) The Shares at such Time of Delivery shall have been duly listed for
quotation on Nasdaq;

        (j) The Company has obtained and delivered to the Underwriters executed
copies of an agreement from each stockholder listed on Schedule III hereto
substantially to the effect set forth in Subsection 1(b)(iv) hereof in form and
substance satisfactory to you;



                                       16
   17

        (k) The Company shall have complied with the provisions of Section 5(c)
hereof with respect to the furnishing of prospectuses on the New York Business
Day next succeeding the date of this Agreement; and

        (l) The Company and the Selling Stockholders shall have furnished or
caused to be furnished to you at such Time of Delivery certificates of officers
of the Company and of the Selling Stockholders, respectively, satisfactory to
you as to the accuracy of the representations and warranties of the Company and
the Selling Stockholders, respectively, herein at and as of such Time of
Delivery, as to the performance by the Company and the Selling Stockholders of
all of their respective obligations hereunder to be performed at or prior to
such Time of Delivery, and as to such other matters as you may reasonably
request, and the Company shall have furnished or caused to be furnished
certificates as to the matters set forth in subsections (a) and (f) of this
Section.

        8. (a) The Company will indemnify and hold harmless each Underwriter
against any losses, claims, damages or liabilities, joint or several, to which
such Underwriter may become subject, under the Act or otherwise, insofar as such
losses, claims, damages or liabilities (or actions in respect thereof) arise out
of or are based upon an untrue statement or alleged untrue statement of a
material fact contained in any Preliminary Prospectus, the Registration
Statement or the Prospectus, or any amendment or supplement thereto, or arise
out of or are based upon the omission or alleged omission to state therein a
material fact required to be stated therein or necessary to make the statements
therein not misleading, and will reimburse each Underwriter for any legal or
other expenses reasonably incurred by such Underwriter in connection with
investigating or defending any such action or claim as such expenses are
incurred; provided, however, that the Company shall not be liable in any such
case to the extent that any such loss, claim, damage or liability arises out of
or is based upon an untrue statement or alleged untrue statement or omission or
alleged omission made in any Preliminary Prospectus, the Registration Statement
or the Prospectus or any such amendment or supplement in reliance upon and in
conformity with written information furnished to the Company by any Underwriter
expressly for use therein.

        (b) Each of the Selling Stockholders, severally and not jointly, will
indemnify and hold harmless each Underwriter against any losses, claims, damages
or liabilities, joint or several, to which such Underwriter may become subject,
under the Act or otherwise, insofar as such losses, claims, damages or
liabilities (or actions in respect thereof) arise out of or are based upon an
untrue statement or alleged untrue statement of a material fact contained in any
Preliminary Prospectus, the Registration Statement or the Prospectus, or any
amendment or supplement thereto, or arise out of or are based upon the omission
or alleged omission to state therein a material fact required to be stated
therein or necessary to make the statements therein not misleading, in each case
to the extent, but only to the extent, that such untrue statement or alleged
untrue statement or omission or alleged omission was made in any Preliminary
Prospectus, the Registration Statement or the Prospectus or any such amendment
or supplement in reliance upon and in conformity with written information
relating to such Selling Stockholder furnished to the Company by such Selling
Stockholder expressly for use therein;



                                       17
   18

and each such Selling Stockholder will reimburse each Underwriter for any legal
or other expenses reasonably incurred by such Underwriter in connection with
investigating or defending any such action or claim as such expenses are
incurred; provided, however, that such Selling Stockholder shall not be liable
in any such case to the extent that any such loss, claim, damage or liability
arises out of or is based upon an untrue statement or alleged untrue statement
or omission or alleged omission made in any Preliminary Prospectus, the
Registration Statement or the Prospectus or any such amendment or supplement in
reliance upon and in conformity with written information furnished to the
Company by any Underwriter expressly for use therein; and further provided
however, that the liability of a Selling Stockholder pursuant to this subsection
(b) shall not exceed the product of the number of Shares sold by such Selling
Stockholder and the initial public offering price less the underwriting discount
of the Shares, as set forth in the Prospectus.

        (c) Each Underwriter will indemnify and hold harmless the Company and
each Selling Stockholder against any losses, claims, damages or liabilities to
which the Company or such Selling Stockholder may become subject, under the Act
or otherwise, insofar as such losses, claims, damages or liabilities (or actions
in respect thereof) arise out of or are based upon an untrue statement or
alleged untrue statement of a material fact contained in any Preliminary
Prospectus, the Registration Statement or the Prospectus, or any amendment or
supplement thereto, or arise out of or are based upon the omission or alleged
omission to state therein a material fact required to be stated therein or
necessary to make the statements therein not misleading, in each case to the
extent, but only to the extent, that such untrue statement or alleged untrue
statement or omission or alleged omission was made in any Preliminary
Prospectus, the Registration Statement or the Prospectus or any such amendment
or supplement in reliance upon and in conformity with written information
furnished to the Company by such Underwriter expressly for use therein; and will
reimburse the Company and each Selling Stockholder for any legal or other
expenses reasonably incurred by the Company or such Selling Stockholder in
connection with investigating or defending any such action or claim as such
expenses are incurred.

        (d) Promptly after receipt by an indemnified party under subsection (a),
(b) or (c) above of notice of the commencement of any action, such indemnified
party shall, if a claim in respect thereof is to be made against the
indemnifying party under such subsection, notify the indemnifying party in
writing of the commencement thereof; but the omission so to notify the
indemnifying party shall not relieve it from any liability which it may have to
any indemnified party otherwise than under such subsection. In case any such
action shall be brought against any indemnified party and it shall notify the
indemnifying party of the commencement thereof, the indemnifying party shall be
entitled to participate therein and, to the extent that it shall wish, jointly
with any other indemnifying party similarly notified, to assume the defense
thereof, with counsel reasonably satisfactory to such indemnified party (who
shall not, except with the consent of the indemnified party, be counsel to the
indemnifying party), and, after notice from the indemnifying party to such
indemnified party of its election so to assume the defense thereof, the
indemnifying party shall not be liable to such indemnified party under such
subsection for any legal expenses of other counsel or any other expenses, in
each case subsequently incurred by such indemnified party, in connection with
the defense thereof other than reasonable costs of investigation. No
indemnifying party shall, without the written consent of the indemnified party,
effect the settlement or compromise of, or consent to the entry of any judgment
with respect to, any pending or threatened action or claim in respect of which
indemnification or contribution may be sought hereunder (whether or not the
indemnified party is an actual or potential party to such action or claim)
unless such settlement, compromise or judgment (i) includes an unconditional
release of the indemnified party from all liability arising out of such action
or claim and (ii) does not include a statement as to or an admission of fault,
culpability or a failure to act, by or on behalf of any indemnified party.

        (e) If the indemnification provided for in this Section 8 is unavailable
to or insufficient to hold harmless an indemnified party under subsection (a),
(b) or (c) above in respect of any losses, claims, damages or liabilities (or
actions in respect thereof) referred to therein, then each indemnifying party
shall contribute to the amount paid or payable by such indemnified party as a
result of such losses, claims, damages or liabilities (or actions in respect
thereof) in such proportion as is appropriate to reflect the relative benefits
received by the Company and



                                       18
   19

the Selling Stockholders on the one hand and the Underwriters on the other from
the offering of the Shares. If, however, the allocation provided by the
immediately preceding sentence is not permitted by applicable law or if the
indemnified party failed to give the notice required under (d) above, then each
indemnifying party shall contribute to such amount paid or payable by such
indemnified party in such proportion as is appropriate to reflect not only such
relative benefits but also the relative fault of the indemnifying party on the
one hand and the indemnified on the other in connection with the statements or
omissions which resulted in such losses, claims, damages or liabilities (or
actions in respect thereof), as well as any other relevant equitable
considerations. The relative benefits received by the Company and the Selling
Stockholders on the one hand and the Underwriters on the other shall be deemed
to be in the same proportion as the total net proceeds from the offering (before
deducting expenses) received by the Company and the Selling Stockholders bear to
the total underwriting discounts and commissions received by the Underwriters,
in each case as set forth in the table on the cover page of the Prospectus. The
relative fault shall be determined by reference to, among other things, whether
the untrue or alleged untrue statement of a material fact or the omission or
alleged omission to state a material fact relates to information supplied by the
Company or the Selling Stockholders on the one hand or the Underwriters on the
other and the parties' relative intent, knowledge, access to information and
opportunity to correct or prevent such statement or omission. The Company, each
of the Selling Stockholders and the Underwriters agree that it would not be just
and equitable if contributions pursuant to this subsection (e) were determined
by pro rata allocation (even if the Underwriters were treated as one entity for
such purpose) or by any other method of allocation which does not take account
of the equitable considerations referred to above in this subsection (e). The
amount paid or payable by an indemnified party as a result of the losses,
claims, damages or liabilities (or actions in respect thereof) referred to above
in this subsection (e) shall be deemed to include any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim. Notwithstanding the provisions of this
subsection (e), no Underwriter shall be required to contribute any amount in
excess of the amount by which the total price at which the Shares underwritten
by it and distributed to the public were offered to the public exceeds the
amount of any damages which such Underwriter has otherwise been required to pay
by reason of such untrue or alleged untrue statement or omission or alleged
omission, and no Selling Stockholder shall be required to contribute any amount
in excess of the product of the number Shares sold by such Selling Stockholder
and the initial public offering price less the underwriting discount of the
Shares, as set forth in the Prospectus. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Act) shall be
entitled to contribution from any person who was not guilty of such fraudulent
misrepresentation. The Underwriters' obligations in this subsection (e) to
contribute are several in proportion to their respective underwriting
obligations and not joint.

        (f) The obligations of the Company and the Selling Stockholders under
this Section 8 shall be in addition to any liability which the Company and the
respective Selling Stockholders may otherwise have and shall extend, upon the
same terms and conditions, to each person, if any, who controls any Underwriter
within the meaning of the Act; and the obligations of the Underwriters under
this Section 8 shall be in addition to any liability which the respective
Underwriters may otherwise have and shall extend, upon the same terms and
conditions, to each officer and director of the Company (including any person
who, with his or her consent, is named in the Registration Statement as about to
become a director of the Company) and to each person, if any, who controls the
Company or any Selling Stockholder within the meaning of the Act.

        9. (a) If any Underwriter shall default in its obligation to
purchase the Shares which it has agreed to purchase hereunder at a Time of
Delivery, you may in your discretion arrange



                                       19
   20

for you or another party or other parties to purchase such Shares on the terms
contained herein. If within thirty-six hours after such default by any
Underwriter you do not arrange for the purchase of such Shares, then the Company
and the Selling Stockholders shall be entitled to a further period of thirty-six
hours within which to procure another party or other parties reasonably
satisfactory to you to purchase such Shares on such terms. In the event that,
within the respective prescribed periods, you notify the Company and the Selling
Stockholders that you have so arranged for the purchase of such Shares, or the
Company and the Selling Stockholders notify you that they have so arranged for
the purchase of such Shares, you or the Company and the Selling Stockholders
shall have the right to postpone a Time of Delivery for a period of not more
than seven days, in order to effect whatever changes may thereby be made
necessary in the Registration Statement or the Prospectus, or in any other
documents or arrangements, and the Company agrees to file promptly any
amendments to the Registration Statement or the Prospectus which in your opinion
may thereby be made necessary. The term "Underwriter" as used in this Agreement
shall include any person substituted under this Section with like effect as if
such person had originally been a party to this Agreement with respect to such
Shares.

        (b) If, after giving effect to any arrangements for the purchase of the
Shares of a defaulting Underwriter or Underwriters by you and the Company and
the Selling Stockholders as provided in subsection (a) above, the aggregate
number of such Shares which remains unpurchased does not exceed one-eleventh of
the aggregate number of all the Shares to be purchased at such Time of Delivery,
then the Company and the Selling Stockholders shall have the right to require
each non-defaulting Underwriter to purchase the number of Shares which such
Underwriter agreed to purchase hereunder at such Time of Delivery and, in
addition, to require each non-defaulting Underwriter to purchase its pro rata
share (based on the number of Shares which such Underwriter agreed to purchase
hereunder) of the Shares of such defaulting Underwriter or Underwriters for
which such arrangements have not been made; but nothing herein shall relieve a
defaulting Underwriter from liability for its default.

        (c) If, after giving effect to any arrangements for the purchase of the
Shares of a defaulting Underwriter or Underwriters by you and the Company and
the Selling Stockholders as provided in subsection (a) above, the aggregate
number of such Shares which remains unpurchased exceeds one-eleventh of the
aggregate number of all of the Shares to be purchased at such Time of Delivery,
or if the Company and the Selling Stockholders shall not exercise the right
described in subsection (b) above to require non-defaulting Underwriters to
purchase Shares of a defaulting Underwriter or Underwriters, then this Agreement
(or, with respect to the Second Time of Delivery, the obligations of the
Underwriters to purchase and of the Selling Stockholders to sell the Optional
Shares) shall thereupon terminate, without liability on the part of any
non-defaulting Underwriter or the Company or the Selling Stockholders, except
for the expenses to be borne by the Company and the Selling Stockholders and the
Underwriters as provided in Section 6 hereof and the indemnity and contribution
agreements in Section 8 hereof; but nothing herein shall relieve a defaulting
Underwriter from liability for its default.

        10. The respective indemnities, agreements, representations, warranties
and other statements of the Company, the Selling Stockholders and the several
Underwriters, as set forth in this Agreement or made by or on behalf of them,
respectively, pursuant to this Agreement, shall remain in full force and effect,
regardless of any investigation (or any statement as to the results thereof)
made by or on behalf of any Underwriter or any controlling person of any
Underwriter, or the Company, or any of the Selling Stockholders, or any officer
or director or controlling person of the Company, or any controlling person of
any Selling Stockholder, and shall survive delivery of and payment for the
Shares.



                                       20
   21

        11. If this Agreement shall be terminated pursuant to Section 9 hereof,
neither the Company nor the Selling Stockholders shall then be under any
liability to any Underwriter except as provided in Sections 6 and 8 hereof; but,
if for any other reason any Shares are not delivered by or on behalf of the
Company and the Selling Stockholders as provided herein, the Company and each of
the Selling Stockholders pro rata (based on the number of Shares to be sold by
the Company and such Selling Stockholder hereunder) will reimburse the
Underwriters through you for all out-of-pocket expenses approved in writing by
you, including fees and disbursements of counsel, reasonably incurred by the
Underwriters in making preparations for the purchase, sale and delivery of the
Shares not so delivered, but the Company and the Selling Stockholders shall then
be under no further liability to any Underwriter in respect of the Shares not so
delivered except as provided in Sections 6 and 8 hereof.

        12. In all dealings hereunder, you shall act on behalf of each of the
Underwriters, and the parties hereto shall be entitled to act and rely upon any
statement, request, notice or agreement on behalf of any Underwriter made or
given by you jointly or by Goldman, Sachs & Co. on behalf of you as the
representatives; and in all dealings with any Selling Stockholder hereunder, you
and the Company shall be entitled to act and rely upon any statement, request,
notice or agreement on behalf of such Selling Stockholder made or given by any
or all of the Attorneys-in-Fact for such Selling Stockholder.

        All statements, requests, notices and agreements hereunder shall be in
writing, and if to the Underwriters shall be delivered or sent by mail, telex or
facsimile transmission to you as the REPRESENTATIVES in care of Goldman, Sachs &
Co., 32 Old Slip, 9th Floor, New York, New York 10005, Attention: Registration
Department; if to any Selling Stockholder shall be delivered or sent by mail,
telex or facsimile transmission to counsel for such Selling Stockholder at its
address set forth in Schedule II hereto; and if to the Company shall be
delivered or sent by mail, telex or facsimile transmission to the address of the
Company set forth in the Registration Statement, Attention: Secretary; provided,
however, that any notice to an Underwriter pursuant to Section 8(d) hereof shall
be delivered or sent by mail, telex or facsimile transmission to such
Underwriter at its address set forth in its Underwriters' Questionnaire or telex
constituting such Questionnaire, which address will be supplied to the Company
or the Selling Stockholders by you on request. Any such statements, requests,
notices or agreements shall take effect upon receipt thereof.

        13. This Agreement shall be binding upon, and inure solely to the
benefit of, the Underwriters, the Company and the Selling Stockholders and, to
the extent provided in Sections 8 and 10 hereof, the officers and directors of
the Company and each person who controls the Company, any Selling Stockholder or
any Underwriter, and their respective heirs, executors, administrators,
successors and assigns, and no other person shall acquire or have any right
under or by virtue of this Agreement. No purchaser of any of the Shares from any
Underwriter shall be deemed a successor or assign by reason merely of such
purchase.

        14. Time shall be of the essence of this Agreement. As used herein, the
term "business day" shall mean any day when the Commission's office in
Washington, D.C. is open for business.

        15. THIS AGREEMENT SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH
THE LAWS OF THE STATE OF NEW YORK.

        16. This Agreement may be executed by any one or more of the parties
hereto in any number of counterparts, each of which shall be deemed to be an
original, but all such counterparts shall together constitute one and the same
instrument.



                                       21
   22

        If the foregoing is in accordance with your understanding, please sign
and return to us seven (7) counterparts hereof, and upon the acceptance hereof
by you, on behalf of each of the Underwriters, this letter and such acceptance
hereof shall constitute a binding agreement among each of the Underwriters, the
Company and each of the Selling Stockholders. It is understood that your
acceptance of this letter on behalf of each of the Underwriters is pursuant to
the authority set forth in a form of Agreement among Underwriters, the form of
which shall be submitted to the Company and the Selling Stockholders for
examination, upon request, but without warranty on your part as to the authority
of the signers thereof.



                                       22
   23

        Any person executing and delivering this Agreement as Attorney-in-Fact
for a Selling Stockholder represents by so doing that he has been duly appointed
as Attorney-in-Fact by such Selling Stockholder pursuant to a validly existing
and binding Power-of-Attorney which authorizes such Attorney-in-Fact to take
such action.

                                          Very truly yours,

                                          JUNIPER NETWORKS, INC.

                                          By:
                                             ---------------------------------
                                             Name:
                                             Title:

                                          LUCENT TECHNOLOGIES, INC
                                          NEWBRIDGE NETWORKS CORPORATION
                                          ANSHUTZ FAMILY INVESTMENT COMPANY LLC
                                          MCI WORLDCOM
                                          VENTURE FUND, INC.

                                          By:
                                             ---------------------------------
                                             Name:
                                             Title:

                                             As Attorney-in-Fact acting on
                                             behalf of each of the Selling
                                             Stockholders named in Schedule II
                                             to this Agreement

Accepted as of the date hereof at New York, New York:

Goldman, Sachs & Co.
Credit Suisse First Boston Corporation
BancBoston Robertson Stephens Inc.
Dain Rauscher Wessels, a division of Dain Rauscher Incorporated
SG Cowen Securities Corporation
Warburg Dillon Read LLC

By:
   ---------------------------------
       (Goldman, Sachs & Co.)

   On behalf of each of the
    Underwriters



                                       23
   24

                                   SCHEDULE I



                                                                                   NUMBER OF
                                                                                   OPTIONAL
                                                                                 SHARES TO BE
                                                             TOTAL NUMBER OF     PURCHASED IF
                                                               FIRM( SHARES     MAXIMUM OPTION
                       UNDERWRITER(a)                        TO BE PURCHASED       EXERCISED
                       --------------                        ---------------       ---------
                                                                          
Goldman, Sachs & Co.
Credit Suisse First Boston Corporation
BancBoston Robertson Stephens Inc.
Dain Rauscher Wessels, a division of Dain Rauscher
Incorporated
SG Cowen Securities Corporation
Warburg Dillon Read LLC





                                                             ---------------       --------------
        Total............................................

                                                             ===============       ==============


- ----------
(a)     Each of these Underwriters has appointed ___________________________
        _____________ and any Managing Director or Vice President in the New
        York Special Execution Group of Goldman, Sachs & Co., and each of them,
        as their Attorneys-in-Fact.



   25

                                   SCHEDULE II



                                                                              NUMBER OF OPTIONAL
                                                                                 SHARES TO BE
                                                            TOTAL NUMBER OF        SOLD IF
                                                              FIRM SHARES       MAXIMUM OPTION
                                                               TO BE SOLD         EXERCISED
                                                               ----------         ---------
                                                                        
The Company.............................................

     The Selling Stockholders:

            Lucent Technologies, Inc.   ................
            Newbridge Networks Corporation..............
            Anshutz Family Investment Company LLC.......
            MCI WorldCom Venture Fund, Inc..............

                                                               ----------         ---------
       Total...........................................

                                                               ==========         =========


- -------------------
(a)   The Selling Stockholders are represented by and have appointed Lisa C.
      Berry as their Attorney-in-Fact.



   26

                                  SCHEDULE III

                               LOCK-UP AGREEMENTS

                                  ADDARIO, TONY

                           ERICSSON BUSINESS NETWORKS

                                FURGERSON, JOSEPH

                                  GANI, MARCEL

                     GANI, MARCEL FOR THE GANI FAMILY TRUST

                GANI, VICTOR FOR THE 1995 GANI IRREVOCABLE TRUST

                                  HALEY, STEVEN

         SR & KP HALEY CHARITABLE REMAINDER UNITRUST FOR CHRIS S. HALEY

        SR & KP HALEY CHARITABLE REMAINDER UNITRUST FOR COURTNEY J. HALEY

        SR & KP HALEY CHARITABLE REMAINDER UNITRUST FOR MATTHEW J. HALEY

         STEVEN R. & KATHLEEN P. HALEY FAMILY FOUNDATION (GIVING) TRUST

                              HEIDENREICH, GARY L.

                    KLEINER PERKINS CAUFIELD & BYERS FUND VII

                   KPCB INFORMATION SCIENCES ZAIBATSU FUND II

                             HEARST, WILLIAM R. III

                                  KHOSLA, VINOD

  KRIENS, ERIC KRIENS AND DAVID BROOKS, TRUSTEES OF THE ANDREW JOHN KRIENS 1998
                        IRREVOCABLE TRUST DATED 05/08/98

 KRIENS, ERIC KRIENS AND DAVID BROOKS, TRUSTEES OF THE KRIENS 1998 CHILDREN'S
                              TRUST DATED 05/08/98

                                  KRIENS, SCOTT

 KRIENS, SCOTT AND JOAN KRIENS TRUSTEES, KRIENS 1996 TRUST U/T/A/ OCT. 29, 1996

                             NEA PRESIDENTS FUND, LP

                NEA ENTERPRISE ASSOCIATES VI, LIMITED PARTNERSHIP

                              NEA VENTURES 1996, LP



   27

              SINDHU, PRADEEP SINDHU, CUSTODIAN FOR ANTOINE SINDHU

             SINDHU, PRADEEP SINDHU, CUSTODIAN FOR CAMILLE A. SINDHU

   SINDHU, PRADEEP SINDHU, TRUSTEE OF PRADEEP SINDHU ANNUITY TRUST I U/I DTD.
                                    06/11/99

   SINDHU, PRADEEP SINDHU, TRUSTEE OF PRADEEP SINDHU ANNUITY TRUST II U/I DTD.
                                    06/11/99

  SINDHU, PRADEEP SINDHU, TRUSTEE OF PRADEEP SINDHU ANNUITY TRUST III U/I DTD.
                                    06/11/99

    SINDHU, PRADEEP SINDHU, TRUSTEE OF MARIE FRANCOISE BERTRAND ANNUITY TRUST
                               I U/I DTD. 06/11/99

  SINDHU, PRADEEP SINDHU, TRUSTEE OF MARIE FRANCOISE BERTRAND ANNUITY TRUST II
                                U/I DTD. 06/11/99

  SINDHU, PRADEEP SINDHU, TRUSTEE OF MARIE FRANCOISE BERTRAND ANNUITY TRUST III
                                U/I DTD. 06/11/99

                               SINDHU, PRADEEP S.

                              STENSRUD, WILLIAM R.

                 STENSRUD FAMILY TRUST, WILLIAM STENSRUD TRUSTEE

                               WEXLER, PETER LEWIS



   28

                                                                         ANNEX I

                                     FORM OF
                                 COMFORT LETTER