Document:

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                                                                    EXHIBIT 10.1

                               F5 NETWORKS, INC.
                  COMMON STOCK AND WARRANT PURCHASE AGREEMENT

This Common Stock and Warrant Purchase Agreement (the "Agreement") is made as of
June 26, 2001, by and between F5 NETWORKS, INC., a Washington corporation (the
"Company"), and NOKIA FINANCE INTERNATIONAL BV, a private company with limited
liability (besloten vennootschap met beperkte aansprakelijkheid organized under
the laws of the Netherlands (the "Investor"), and a subsidiary of Nokia
Corporation, a Finnish corporation.

THE PARTIES HEREBY AGREE AS FOLLOWS:

1. PURCHASE AND SALE OF STOCK AND WARRANT.

        1.1 SALE AND ISSUANCE OF COMMON STOCK AND WARRANT. Subject to the terms
and conditions of this Agreement, the Investor agrees to purchase at the Closing
and the Company agrees to sell and issue to the Investor at the Closing, (i) a
Common Stock purchase warrant in the form attached hereto as Exhibit B (the
"Warrant") and (ii) 2,466,421 shares of common stock, without par value, of the
Company (the "Common Stock") being that number of shares equal to ten percent of
the Company's outstanding Common Stock, as measured on the close of business on
June 25, 2001, less one share, for the per share purchase price equal to $
14.871 per share, being the average of the last reported sales price of the
Common Stock on the Nasdaq National Market for the ten (10) consecutive trading
days ending on and including June 26, 2001.

        1.2 CLOSING. The purchase and sale of the Common Stock and Warrant shall
take place at the offices of the Company, on or before 10:00 A.M. Pacific time,
on June 28, 2001, or at such other time and place as the Company and the
Investor mutually agree upon in writing (which time and place are designated as
the "Closing"). At the Closing, the Company shall deliver to the Investor: (i) a
certificate representing the Common Stock that the Investor is purchasing
against payment of the purchase price therefor by wire transfer; (ii) the
Warrant and (iii) the other documents referred to in Section 4 of this
Agreement.

2. REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company hereby represents
and warrants to the Investor that, except as set forth on a Schedule of
Exceptions (the "Schedule of Exceptions") furnished to the Investor on or prior
to entering into this Agreement, which exceptions shall qualify the
representation and warranty that has the corresponding number as the numbered
paragraph in the Schedule of Exceptions, and shall be deemed to be
representations and warranties as if made hereunder, as of the date hereof and
as of the date of Closing:

        2.1 ORGANIZATION AND QUALIFICATION. The Company is a corporation duly
organized and validly existing under the laws of the State of Washington and is
qualified to do business in every jurisdiction in which it is required to be
qualified, except where the failure to so qualify has not had and would not
reasonably be expected to have a

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material adverse effect on the current or prospective business, financial
condition or results of operations of the Company and its subsidiaries taken as
a whole or prejudice the Company's ability to enter into or perform its
obligations under any of the Transaction Documents (as defined below) (a
"Material Adverse Effect"). The Company possesses all requisite corporate power
and authority and all licenses, permits and authorizations necessary to own and
operate its properties and to carry on its business as now conducted and as
proposed to be conducted, subject to such exceptions as would not have a
Material Adverse Effect. The Company has delivered to Investor correct and
complete copies of the Company's articles of incorporation and bylaws reflecting
all amendments made thereto at any time prior to the date of this Agreement.

        2.2 CAPITALIZATION; VOTING RIGHTS; PREEMPTIVE RIGHTS; SUBSIDIARIES.

            (a) The authorized capital of the Company consists of: 100,000,000
shares of Common Stock of which 22,197,803 shares are issued and outstanding as
of the date hereof, and 10,000,000 shares of Preferred Stock, without par value
(the "Preferred Stock"), none of which has been designated or is outstanding as
of the date hereof. Such issued and outstanding shares of Common Stock have been
duly authorized and are validly issued, fully-paid and nonassessable.

            (b) Except for (A) the rights provided in the Transaction Agreements
(as defined in Section 2.3 below) and (B) currently outstanding options to
purchase 7,099,278 shares of Common Stock granted to employees and other service
providers pursuant to the Company's 1996, 1998, 2000 and Non-Employee Directors
Stock Option Plans, there are not outstanding any stock or securities
convertible or exchangeable for any shares of capital stock of the Company or
any of its subsidiaries, nor does the Company or any of its subsidiaries have
outstanding any rights, options or warrants to subscribe for or to purchase its
capital stock or any stock or securities convertible into or exchangeable for
its capital stock or any stock appreciation rights or phantom stock plans, nor
has it reserved any shares of capital stock for issuance upon exercise or
conversion of any rights, options or warrants to subscribe for or to purchase
its capital stock or any stock or securities convertible into or exchangeable
for its capital stock. Neither the Company nor any of its subsidiaries is
subject to any obligation (contingent or otherwise) to repurchase or otherwise
acquire or retire any shares of its capital stock or any warrants, options or
other rights to acquire its capital stock. Neither the Company nor any of its
subsidiaries is a party or subject to any agreement or understanding, and, to
the best of the Company's knowledge, there is no agreement or understanding
between any persons and/or entities, which affects or relates to the voting or
giving of written consents with respect to any security or by a director of the
Company.

            (c) Except for the rights provided in the Transaction Agreements,
there are no statutory shareholders preemptive rights or similar contractual
rights to which the Company is subject or rights of refusal to which the Company
is subject with respect to the issuance of capital stock of the Company.

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            (d) Each of the Company's subsidiaries is wholly owned by the
Company and is duly organized, validly existing and in good standing under the
laws of the state of its incorporation, possesses all requisite corporate power
and authority and, except for such exceptions as would not have a Material
Adverse Effect, has all licenses, permits and authorizations necessary to own
its properties and to carry on its businesses as now being conducted and is
qualified to do business in each jurisdiction in which it is required to be
qualified, except where the failure to so qualify would not have a Material
Adverse Effect. All of the outstanding shares of capital stock of each
subsidiary are duly authorized, validly issued, fully paid and nonassessable,
and all such shares are owned by the Company free and clear any mortgage,
pledge, security interest, encumbrance, lien or charge of any kind (including,
without limitation, any conditional sale or other title retention agreement or
lease in the nature thereof).

        2.3 AUTHORIZATION; NO CONFLICTS.

            (a) All corporate action on the part of the Company, and its
officers, directors and shareholders that is necessary for the authorization,
execution and delivery of this Agreement, the Investor's Rights Agreement in the
form attached hereto as Exhibit A (the "Investor's Rights Agreement"), the
Warrant, the OEM Agreement in the form attached hereto as Exhibit C (the "OEM
Agreement"), and the Technology Development Agreement in the form attached
hereto as Exhibit D (the "Technology Agreement") (this Agreement, the Investor's
Rights Agreement, the Warrant, the OEM Agreement and the Technology Agreement
are collectively referred to as the "Transaction Agreements"), the performance
of all obligations of the Company hereunder and thereunder, and the
authorization, issuance (or reservation for issuance), sale and delivery of the
Common Stock being sold hereunder and the Common Stock issuable upon exercise of
the Warrant has been taken or will be taken prior to the Closing, and the
Transaction Agreements constitute valid and legally binding obligations of the
Company, enforceable in accordance with their respective terms, except (i) as
limited by applicable bankruptcy, insolvency, reorganization, moratorium, and
other laws of general application affecting enforcement of creditors' rights
generally, (ii) as limited by laws relating to the availability of specific
performance, injunctive relief, or other equitable remedies, and (iii) to the
extent the indemnification provisions contained in the Investor's Rights
Agreement may be limited by applicable federal or state securities laws.

            (b) The execution, delivery and performance of this Agreement or any
other Transaction Documents do not, and the consummation of the transactions
contemplated hereby and thereby will not, constitute or result in a breach or
violation of, or a default under (A) the Articles of Incorporation or Bylaws of
the Company, (B) any agreement, lease, license, contract, note, mortgage,
indenture, arrangement or other obligation ("Contracts") binding upon the
Company or any federal, state, local or foreign law, statute, ordinance, rule,
regulation, judgment, order, injunction, decree, arbitration award, agency
requirement, license or permit (collectively, "Laws") of any governmental or
regulatory authority, agency, commission, body or other governmental entity
("Governmental Entity") to which the Company is subject, except in the case of

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Contracts, for those breaches, violations or defaults that would not,
individually or in the aggregate, have a Material Adverse Effect.

        2.4 VALID ISSUANCE OF COMMON STOCK. The Common Stock that is being
purchased by the Investor hereunder, when issued, sold and delivered in
accordance with the terms of this Agreement for the consideration expressed
herein, will be duly authorized, validly issued, fully paid and nonassessable,
and will be free of restrictions on transfer other than restrictions on transfer
under the Transaction Agreements and under applicable state and federal
securities laws. The shares of Common Stock issuable upon exercise of the
Warrant have been duly and validly reserved for issuance and, upon issuance in
accordance with the terms of the Company's Articles of Incorporation, will be
duly authorized, validly issued, fully paid and nonassessable and will be free
of restrictions on transfer other than restrictions on transfer under the
Transaction Agreements and under applicable state and federal securities laws.

        2.5 COMPANY REPORTS; FINANCIAL STATEMENTS. The Company has delivered or
made available to the Investor (i) each registration statement, report, proxy
statement or information statement filed with the Securities and Exchange
Commission (the "SEC") since September 30, 2000, including the Company's Annual
Report on Form 10-K for the fiscal year ended September 30, 2000, the Company's
Quarterly Reports on Form 10-Q for the quarters ended December 31, 2000 and
March 31, 2001 and the Company's proxy statement dated March 7, 2001 with
respect to its annual meeting in each case in the form (including exhibits,
annexes and any amendments thereto) filed with the SEC (collectively, the
"Company Reports"). As of their respective dates, the Company Reports complied
in all material respects with the requirements of the Securities Act of 1933, as
amended (the "Securities Act") and the Securities Exchange Act of 1934, as
amended and did not contain any untrue statement of a material fact or omit to
state a material fact required to be stated therein or necessary to make the
statements made therein, in light of the circumstances in which they were made,
not misleading. Each of the balance sheets included in or incorporated by
reference into the Company Reports (including the related notes and schedules)
fairly presents in all material respects the financial position of the Company
as of its date and each of the statements of operations, stockholders equity and
cash flows included in or incorporated by reference into the Company Reports
(including any related notes and schedules) fairly presents in all material
respects the results of operations, net losses and cash flows, as the case may
be, of the Company for the periods set forth therein (subject, in the case of
unaudited statements, to the absence of notes and normal year-end audit
adjustments), in each case in accordance with generally accepted accounting
principles consistently applied during the periods involved, except as may be
noted therein (the date of the most recently filed balance sheet of the Company
is hereinafter referred to as the "Balance Sheet Date").

        2.6 NO MATERIAL ADVERSE CHANGE. Since the Balance Sheet Date, there has
been no material adverse change in the financial condition, operating results,
assets, operations, employee relations or customer or supplier relations of the
Company and its subsidiaries, taken as a whole.

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        2.7 GOVERNMENTAL FILINGS; NO VIOLATIONS. No notices, reports or other
filings are required to be made by the Company with, nor are any consents,
registrations, approvals, permits or authorizations required to be obtained by
the Company from any Governmental Entity, in connection with the execution and
delivery of this Agreement or any other Transaction Documents by the Company and
the consummation of the transactions contemplated hereby and thereby, except for
those that the failure to make or obtain would not have a Material Adverse
Effect.

        2.8 COMPLIANCE WITH OTHER INSTRUMENTS. The Company is not in violation
or default in any material respect of any provision of its Articles of
Incorporation or Bylaws, each as currently in effect, or in any material respect
of any instrument, judgment, order, writ, decree or Contract to which it is a
party or by which it is bound, or, to the best of its knowledge, of any
provision of any Law applicable to the Company.

        2.9 INTELLECTUAL PROPERTY RIGHTS. Except as disclosed in the Company
Reports, each of the Company and its subsidiaries (i) owns or possesses adequate
licenses or other rights to use all patents, trademarks, service marks, trade
names, copyrights, technology, software, know-how and trade secrets
(collectively, "Intellectual Property") necessary (a) to conduct the business
now conducted by the Company and its subsidiaries and (b) to commercially
exploit their respective products, technology and other assets; and (ii) either
owns or possesses, or can acquire on commercially reasonable terms, adequate
licenses or other rights to use all Intellectual Property necessary (a) to
conduct the business proposed to be conducted by the Company and its
subsidiaries and (b) to commercially exploit their respective products,
technology and other assets in connection with such proposed business. Except as
disclosed in the Company Reports, neither the Company nor any of its
subsidiaries has received any notice of infringement of or conflict with and
knows of no such infringement of or conflict with, asserted rights of others
with respect to any Intellectual Property; and, to the Company's knowledge, the
discoveries, inventions, products, services or processes used in the business of
the Company and its subsidiaries do not infringe or conflict with any right or
patent of any third party, or any discovery, invention, product or process which
is the subject of a patent application filed by any third party. To the
Company's knowledge, neither the Company nor any of its subsidiaries
incorporates open source software in any of its products

        2.10 LITIGATION, ETC. Except as set forth in the Company Reports, there
are no actions, suits, proceedings, orders, investigations or claims pending
(other than any such actions, suits, proceedings, orders, investigations and
claims which may be pending but of which none of the Company, any of its
subsidiaries and their respective representatives have received notice) or, to
the Company's knowledge, threatened against the Company or any of its
subsidiaries (or to the Company's knowledge, pending or threatened against any
of the officers or directors of the Company or any of its subsidiaries) at law
or in equity, or before or by any Governmental Entity which if determined
adversely to the Company would have a Material Adverse Effect. Neither the
Company nor any of its subsidiaries is subject to any judgment, order or decree
of any court or other Governmental Entity that requires or prohibits any conduct
on the part of the Company or

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any of its subsidiaries that affects the business of the Company in a manner
that would have a Material Adverse Effect.

        2.11 BROKERAGE. There are no claims for brokerage commissions, finders'
fees or similar compensation in connection with the transactions contemplated by
the Transaction Agreements for which the Investor will have any liability or
responsibility based on any arrangement or agreement binding upon the Company or
any of its subsidiaries.

        2.12 DISCLOSURE. To the best of the Company's knowledge, neither this
Agreement nor the Investor's Rights Agreement or the Warrant contains any untrue
statement of a material fact or omits to state a material fact necessary to make
the statements herein or therein not misleading.

        2.13 REGISTRATION RIGHTS. Except as provided in the Investor's Rights
Agreement, the Company has not granted or agreed to grant any registration
rights, including piggyback rights, to any person.

        2.14 USE OF PROCEEDS. The Company shall use the proceeds from this
offering for general corporate purposes.

3. REPRESENTATIONS AND WARRANTIES OF THE INVESTOR. The Investor hereby
represents and warrants that:

        3.1 AUTHORIZATION. The Investor has full power and authority to enter
into the Transaction Agreements, and each such agreement constitutes its valid
and legally binding obligation, enforceable in accordance with its terms except
(i) as limited by applicable bankruptcy, insolvency, reorganization, moratorium,
and other laws of general application affecting enforcement of creditors' rights
generally, (ii) as limited by laws relating to the availability of specific
performance, injunctive relief, or other equitable remedies, and (iii) to the
extent the indemnification provisions contained in the Investor's Rights
Agreement may be limited by applicable federal or state securities laws.

        3.2 PURCHASE ENTIRELY FOR OWN ACCOUNT. This Agreement is made with the
Investor in reliance upon the Investor's representation to the Company, which by
the Investor's execution of this Agreement the Investor hereby confirms, that
the Common Stock and Warrant to be received by the Investor (collectively, the
"Securities") will be acquired for investment for the Investor's own account,
not as a nominee or agent, and not with a view to the resale or distribution of
any part thereof, and that the Investor has no present intention of selling,
granting any participation in, or otherwise distributing the same other than in
a transaction registered under the Securities Act or exempt from, or not subject
to, such registration. By executing this Agreement, the Investor further
represents that the Investor does not have any contract, undertaking, agreement
or arrangement with any person to sell, transfer or grant participations to such
person or to any third person, with respect to any of the Securities.

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        3.3 DISCLOSURE OF INFORMATION. The Investor has been afforded access to
such information as it has requested regarding the Company and its subsidiaries
and their respective financial condition, operating results, properties,
liabilities, operations and management .

        3.4 RESTRICTED SECURITIES. The Investor understands that the Securities
it is purchasing are characterized as "restricted securities" under the federal
securities laws inasmuch as they are being acquired from the Company in a
transaction not involving a public offering and that under such laws and
applicable regulations such securities may be resold without registration under
the Securities Act, only in certain limited circumstances. In this connection,
the Investor represents that it is familiar with Rule 144 under the Securities
Act, as presently in effect ("Rule 144"), and understands the resale limitations
imposed thereby and by the Securities Act.

        3.5 FURTHER LIMITATIONS ON DISPOSITION. Without in any way limiting the
representations set forth above, the Investor further agrees not to make any
disposition of all or any portion of the Securities unless and until the
transferee has agreed in writing for the benefit of the Company to be bound by
this Section 3 and the Investor's Rights Agreement provided and to the extent
this Section and such agreement are then applicable, and:

            (a) There is then in effect a Registration Statement under the
Securities Act covering such proposed disposition and such disposition is made
in accordance with such Registration Statement; or

            (b) The Investor shall have notified the Company of the proposed
disposition, and, if reasonably requested by the Company, the Investor shall
have furnished the Company with an opinion of counsel, reasonably satisfactory
to the Company, that such disposition will not require registration of such
shares under the Securities Act. It is agreed that the Company will not require
opinions of counsel for transactions made pursuant to Rule 144.

        3.6 LEGENDS. It is understood that the certificates evidencing the
Securities may bear one or all of the following legend(s):

        "These securities have not been registered under the Securities Act of
        1933, as amended. They may not be sold, offered for sale, pledged or
        hypothecated in the absence of a registration statement in effect with
        respect to the securities under such Act or an opinion of counsel
        satisfactory to the Company that such registration is not required or
        unless sold pursuant to Rule 144 of such Act."

        3.7 REPRESENTATIONS AS A FOREIGN INVESTOR. The Investor has satisfied
itself as to the full observance of the laws of its jurisdiction of organization
in connection with any invitation to subscribe for the Securities or to enter
into this Agreement, including (i) the legal requirements within such
jurisdiction for the purchase of the Securities, (ii) any foreign exchange
restrictions of such jurisdiction applicable to such purchase, (iii) any

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governmental or other consents that may need to be obtained in such
jurisdiction, and (iv) the income tax and other tax consequences, if any, that
may be relevant to the purchase, holding, redemption, sale, or transfer of the
Securities in such jurisdiction. The Investor's subscription and payment for,
and its continued beneficial ownership of the Securities, will not violate any
applicable securities or other laws of its jurisdiction.

4. CONDITIONS OF THE INVESTOR TO EFFECT THE CLOSING. The obligations of the
Investor to effect the Closing are subject to the fulfillment on or before the
Closing of each of the following conditions:

        4.1 REPRESENTATIONS AND WARRANTIES. The representations and warranties
of the Company contained in Section 2 shall be true and correct as of the date
hereof and as of the date of the Closing with the same effect as though such
representations and warranties had been made on and as of the date of such
Closing.

        4.2 PERFORMANCE. The Company shall have performed and complied with all
agreements, obligations and conditions contained in this Agreement that are
required to be performed or complied with by it on or before the Closing.

        4.3 COMPLIANCE CERTIFICATE. The President of the Company shall have
delivered to the Investor at the Closing a certificate stating that the
conditions specified in Sections 4.1 and 4.2 have been fulfilled and stating
that there shall have been no adverse change in the business, affairs,
operations, properties, assets, prospects or condition of the Company and its
subsidiaries taken as a whole since the date of this Agreement. In addition, the
Compliance Certificate shall state the number of shares of the outstanding
Common Stock of the Company immediately prior to the Closing.

        4.4 QUALIFICATIONS. All authorizations, approvals, or permits, if any,
of any governmental authority or regulatory body of the United States or of any
state that are required in connection with the lawful issuance and sale of the
Securities pursuant to this Agreement shall have been duly obtained and
effective as of the Closing.

        4.5 PROCEEDINGS AND DOCUMENTS. All corporate and other proceedings in
connection with the transactions contemplated at the Closing and all documents
incident thereto shall be reasonably satisfactory in form and substance to the
Investor's counsel, and they shall have received all such counterpart original
and certified or other copies of such documents as they may reasonably request.

        4.6 BOARD OF DIRECTORS. The directors of the Company shall be Karl D.
Guelich, Keith D. Grinstein, Alan J. Higginson, John McAdam, and Jeffrey S.
Hussey, and there shall be one vacant Class III director's position on the Board
of Directors, which shall be filled with the nominee of the Investor immediately
upon Closing, which nominee shall be reasonably acceptable to the Board of
Directors of the Company. The initial nominee of the Investor shall be Ken
Frerichs, which nominee is acceptable to the Board of Directors of the Company.

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        4.7 INVESTOR'S RIGHTS AGREEMENT. The Company shall have executed the
Investor's Rights Agreement.

        4.8 WARRANT. The Company shall have executed the Warrant.

        4.9 OEM AGREEMENT. The Company shall have executed the OEM Agreement.

        4.10 TECHNOLOGY AGREEMENT. The Company shall have executed the
Technology Development Agreement.

        4.11 OPINION OF COMPANY COUNSEL. The Investor shall have received from
Graham & Dunn PC, counsel for the Company, an opinion, dated as of the Closing,
substantially in the form attached hereto as Exhibit E. ---------

5. CONDITIONS OF THE COMPANY TO EFFECT THE CLOSING. The obligations of the
Company to effect the Closing are subject to the fulfillment on or before the
Closing of each of the following conditions:

        5.1 REPRESENTATIONS AND WARRANTIES. The representations and warranties
of the Investor contained in Section 3 shall be true and correct as of the date
hereof and as of the date of Closing with the same effect as though such
representations and warranties had been made on and as of the Closing.

        5.2 PAYMENT OF PURCHASE PRICE. The Investor shall have delivered the
purchase price specified in Section 1.2.

        5.3 QUALIFICATIONS. All authorizations, approvals, or permits, if any,
of any governmental authority or regulatory body of the United States or of any
state that are required in connection with the lawful issuance and sale of the
Securities pursuant to this Agreement shall be duly obtained and effective as of
the Closing.

        5.4 OEM AGREEMENT. The Investor shall have executed the OEM Agreement.

        5.5 TECHNOLOGY AGREEMENT. The Investor shall have executed the
Technology Development Agreement.

        5.6 OPINION OF INVESTOR'S COUNSEL. The Company shall have received from
Sullivan & Cromwell, counsel for the Investor, an opinion, dated as of the
Closing, substantially in the form attached hereto as Exhibit F.

6. MISCELLANEOUS.

        6.1 SURVIVAL OF REPRESENTATIONS, WARRANTIES AND OTHER AGREEMENTS. The
representations, warranties and other agreements of each of the Company and the
Investor, respectively, included or provided for in the Transaction Agreements
shall

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survive the execution and delivery of this Agreement, the other Transaction
Agreements and the Closing and shall in no way be affected by any investigation
of the subject matter thereof made by or on behalf of the Company or the
Investor.

        6.2 SUCCESSORS AND ASSIGNS. Except as otherwise provided herein, the
terms and conditions of this Agreement shall inure to the benefit of and be
binding upon the respective successors and assigns of the parties (including
transferees of any Securities). Nothing in this Agreement, express or implied,
is intended to confer upon any party other than the parties hereto or their
respective successors and assigns any rights, remedies, obligations, or
liabilities under or by reason of this Agreement, except as expressly provided
in this Agreement.

        6.3 GOVERNING LAW. This Agreement shall be governed by and construed
under the laws of the State of New York as applied to agreements among New York
residents entered into and to be performed entirely within New York.

        6.4 COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

        6.5 TITLES AND SUBTITLES. The titles and subtitles used in this
Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement.

        6.6 NOTICES. Unless otherwise provided, any notice required or permitted
under this Agreement shall be given in writing and shall be deemed effectively
given upon personal delivery to the party to be notified or upon deposit with
the United States Post Office, by registered or certified mail, postage prepaid
and addressed to the party to be notified at the address indicated for such
party on the signature page hereof, or at such other address as such party may
designate by ten (10) days' advance written notice to the other parties.

        6.7 EXPENSES. Irrespective of whether the Closing is effected, each
party shall pay all of the costs and expenses that it incurs with respect to the
negotiation, execution, delivery and performance of the Transaction Agreements.

        6.8 AMENDMENTS AND WAIVERS. Any term of this Agreement may be amended
and the observance of any term of this Agreement may be waived (either generally
or in a particular instance and either retroactively or prospectively), only
with the written consent of the Company and the Investor. Any amendment or
waiver effected in accordance with this paragraph shall be binding upon each
holder of any securities purchased under this Agreement at the time outstanding
(including securities into which such securities are convertible), each future
holder of all such securities, and the Company.

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        6.9 SEVERABILITY. If one or more provisions of this Agreement are held
to be unenforceable under applicable Law, such provision shall be excluded from
this Agreement and the balance of the Agreement shall be interpreted as if such
provision were so excluded and shall be enforceable in accordance with its
terms.

        6.10 PUBLICITY. No party hereto shall issue any press release or
otherwise make any statements to any third party with respect to this Agreement
or the transactions contemplated hereby until the issuance by the parties of a
joint press release announcing this Agreement and the transactions contemplated
hereby.

        6.11 ENTIRE AGREEMENT. This Agreement and the documents referred to
herein constitute the entire agreement among the parties and no party shall be
liable or bound to any other party in any manner by any warranties,
representations, or covenants except as specifically set forth herein or
therein.

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        IN WITNESS WHEREOF, the parties have executed this Common Stock and
Warrant Purchase Agreement as of the date first above written.

                                      COMPANY  F5 NETWORKS, INC.

                                      BY: /s/ John McAdam
                                      ------------------------------------------
                                      John McAdam,  President

                                      Address:  401 Elliott Avenue West Seattle,
                                      Washington  98119
                                      INVESTOR NOKIA FINANCE INTERNATIONAL BV

                                      BY: /s/  Mika Vehvilainen
                                      ------------------------------------------
                                      Mika Vehvilainen,  Attorney-in-fact

                                      Address:  Strawinskylaan 3111, 1077
                                      ZX Amsterdam, The Netherlands

                                      With copies to
                                      Nokia Corporation
                                      P.O. Box 226
                                      FIN-00045

                                      NOKIA GROUP
                                      Keilalahdentie 4
                                      FIN-02150
                                      Espoo, Finland
                                      Attn:  Ursula Ranin, Vice President,
                                      General Counsel

                                      and

                                      Nokia Internet Communications
                                      313 Fairchild Drive
                                      Mountain View, California  94043 USA
                                      Attn:  John Robinson, Senior Vice
                                      President and General Manager

                                      Nokia Inc.
                                      6000 Connection Drive

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                                      Irving, Texas  75039 USA
                                      Attn: Richard W. Stimson, Vice President,
                                      Legal Services

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                                                                       EXHIBIT A
                       FORM OF INVESTOR'S RIGHTS AGREEMENT

                                       A-1
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                                                                       EXHIBIT B
                                 FORM OF WARRANT

                                       B-1
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                                                                       EXHIBIT C
                              FORM OF OEM AGREEMENT

                                       C-1
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                                                                       EXHIBIT D

                    FORM OF TECHNOLOGY DEVELOPMENT AGREEMENT

                                       D-1
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                                                                       EXHIBIT E
                         FORM OF COMPANY COUNSEL OPINION

                                       E-1
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                                                                       EXHIBIT F
                       FORM OF INVESTOR'S COUNSEL OPINION<PAGE>   1

                                                                    EXHIBIT 10.2

                          INVESTOR'S RIGHTS AGREEMENT

        THIS INVESTOR'S RIGHTS AGREEMENT is made as of June 26, 2001, by and
among F5 NETWORKS, INC., a Washington corporation (the "Company"), and of NOKIA
FINANCE INTERNATIONAL BV a private company with limited liability (besloten
vennootschap met beperkte aansprakelijkheid), incorporated under the laws of The
Netherlands (the "Investor"), and a subsidiary of Nokia Corporation, a Finnish
corporation.

                                    RECITALS

        WHEREAS, the Company and the Investor are parties to the Common Stock
and Warrant Purchase Agreement of dated June 26, 2001 (the "Purchase
Agreement");

        WHEREAS, in order to induce the Company to approve the issuance of the
Company's common stock, without par value (the "Common Stock"), and to induce
the Investor to invest funds in the Company pursuant to the Purchase Agreement,
the Investor and the Company hereby agree that this Agreement shall govern the
rights of the Investor to cause the Company to register shares of Common Stock
issued or issuable to the Investor under the Purchase Agreement and certain
other matters as set forth herein;

              NOW, THEREFORE, THE PARTIES HEREBY AGREE AS FOLLOWS:

1. REGISTRATION RIGHTS. The Company covenants and agrees as follows:

        1.1 DEFINITIONS. For purposes of this Agreement:

           (a) The term "Securities Act" means the Securities Act of 1933, as
amended.

           (b) The term "Change-in-Control Transaction" means (a) any agreement
to which the Company is a party calling for the merger or consolidation of the
Company or the sale of all or a substantial portion of the assets of the
Company; (b) any acquisition by any third party of beneficial ownership of 50%
or more of the outstanding Common Stock of the Company; or (c) any public
announcement of a tender or exchange offer for 50% or more of the outstanding
Common Stock of the Company.

           (c) The term "Form S-3" means such form under the Securities Act as
in effect on the date hereof, any successor registration form or any other
registration form under the Securities Act subsequently adopted by the SEC that
permits inclusion or incorporation of substantial information by reference to
other documents filed by the Company with the SEC.

           (d) The term "Holder" means the Investor and any other person owning
or having the right to acquire Registrable Securities or any assignee thereof in
accordance with Section 1.11 hereof;

           (e) The term "Exchange Act" means the Securities Exchange Act of
1934, as amended.

<PAGE>   2

           (f) The term "register," "registered," and "registration" refer to a
registration effected by preparing and filing a registration statement or
similar document in compliance with the Securities Act, and the declaration or
ordering of effectiveness of such registration statement or document.

           (g) The term "Registrable Securities" means (i) the Common Stock
originally issued under the Purchase Agreement, (ii) the Common Stock issued
upon exercise of the Warrant (as defined in the Purchase Agreement) and (iii)
any Common Stock of the Company issued as (or issuable upon the conversion or
exercise of any warrant, right or other security that is issued as) a dividend
or other distribution with respect to, or in exchange for, or in replacement of,
the shares referenced in (i) and (ii) above, excluding in all cases, however,
any Registrable Securities sold by the Investor in a transaction in which its
rights under this Section 1 are not assigned; and the number of shares of
"Registrable Securities" outstanding at any time, shall be determined by the
number of shares of Common Stock outstanding that are, and the number of shares
of Common Stock issuable pursuant to then exercisable or convertible securities
that are, Registrable Securities.

           (h) The term "Rule 144" shall mean Rule 144 promulgated under the
Securities Act.

           (i) The term "SEC" shall mean the Securities and Exchange Commission.

           (j) The term "Selling Expenses" shall mean underwriting discounts and
commission and fees of disbursements of counsel for the selling Holder or
Holders.

        1.2 DEMAND REGISTRATION.

           (a) Subject to the conditions of this Section 1.2, if the Company
shall receive a written request from either the Investor or Holders of a
majority of the Registrable Securities then outstanding (in either case, the
"Initiating Holders") that the Company file a registration statement under the
Securities Act covering the registration of Registrable Securities then
outstanding such that the anticipated aggregate offering price, net of
underwriting discounts and commissions, would exceed $5,000,000 (a "Qualified
Public Offering"), then the Company shall, within ten (10) days of the receipt
thereof, give written notice of such request to all Holders, and subject to the
limitations of this Section 1.2, use its best efforts to effect, as soon as
practicable, the registration under the Securities Act of all Registrable
Securities that the Holders request to be registered; provided that the Company
shall file the registration statement no later than thirty (30) days following
receipt of such notice. Such registration statement may be filed on any
appropriate registration form for which the Company is then eligible (including
Form S-3) that contemplated an offering of the type proposed by the Initiating
Holders in the request made pursuant to the Section 1.2.

           (b) If the Initiating Holders intend to distribute the Registrable
Securities covered by their request by means of an underwriting, they shall so
advise the Company as a part of their request made pursuant to this Section 1.2
or any request pursuant to Section 1.4 and the Company shall include such
information in the written notice referred to in Section 1.2(a) or Section
1.4(a), as applicable. In such event, the right of any Holder to include its
Registrable Securities in such registration shall be conditioned upon such
Holder's participation in such

                                      -2-

<PAGE>   3

underwriting and the inclusion of such Holder's Registrable Securities in the
underwriting to the extent provided herein. The Company and all Holders
proposing to distribute their securities through such underwriting shall enter
into an underwriting agreement in customary form with the underwriter or
underwriters selected for such underwriting by a majority in interest of the
Initiating Holders (which underwriter or underwriters shall be reasonably
acceptable to the Company). Notwithstanding any other provision of this Section
1.2 or Section 1.4, if the underwriter advises the Company that marketing
factors require a limitation of the number of shares to be underwritten
(including Registrable Securities) then the Company shall so advise all Holders
of Registrable Securities which would otherwise be underwritten pursuant hereto,
and the number of shares that may be included in the underwriting shall be
allocated on a pro rata basis based on the total number of Registrable
Securities held by all such Holders. Any Registrable Securities excluded or
withdrawn from such underwriting shall be withdrawn from the registration.

           (c) The Company shall not be required to effect a registration
pursuant to this Section 1.2:

               (i) prior to December 31, 2001;

               (ii) after the Company has effected three (3) registrations
pursuant to this Section 1.2, and such registrations have been declared or
ordered effective;

               (iii) during the period starting 30 days prior to the date of
filing of, and ending on the date ninety (90) days following the effective date
of the registration statement pertaining to a public offering of securities by
the Company; provided that the Company makes reasonable good faith efforts to
cause such registration statement to become effective; or

               (iv) if the Company shall furnish to Holders requesting a
registration statement pursuant to this Section 1.2, a certificate signed by the
Chairman of the Board or Chief Executive Officer of the Company stating that in
the good faith judgment of the Board of Directors of the Company, it would be
seriously detrimental to the Company and its shareholders for such registration
to be effected at such time (it being acknowledged that the Investor's decision
to sell or any direct or perceived impact of that decision on any related
business or commercial relationships between the Investor and the Company shall
not be deemed seriously detrimental within the meaning of this provision), in
which event the Company shall have the right to defer such filing for a period
of not more than ninety (90) days after receipt of the request of the Initiating
Holders; provided, however, that such right to delay a request shall not be
exercised by the Company more than once in any twelve (12) month period.

        1.3 PIGGY-BACK REGISTRATION

           (a) If (but without any obligation to do so) the Company proposes to
register (including for this purpose a registration effected by the Company for
shareholders other than the Holders) any of its stock or other securities under
the Securities Act in connection with the public offering of such securities
(other than a registration relating solely to the sale of securities to
participants in a Company stock plan or a registration relating to a corporate
reorganization or other transaction under Rule 145 of the Securities Act), the
Company shall, at such time,

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<PAGE>   4

promptly give each Holder written notice of such registration. Upon the written
request of each Holder given within twenty (20) days after delivery of such
notice by the Company in accordance with Section 3.5, the Company shall, subject
to the provisions of Section 1.3(c), use all reasonable efforts to cause to be
registered under the Securities Act all of the Registrable Securities that each
such Holder has requested to be registered; provided, however, that the Company
shall not be obligated to include any Registrable Securities in any such
registration, qualification or compliance, pursuant to this Section 1.3 prior to
December 31, 2001.

           (b) RIGHT TO TERMINATE REGISTRATION. The Company shall have the right
to terminate or withdraw any registration initiated by it under this Section 1.3
prior to the effectiveness of such registration whether or not any Holder has
elected to include securities in such registration. The expenses of such
withdrawn registration shall be borne by the Company in accordance with Section
1.7 hereof.

           (c) UNDERWRITING REQUIREMENTS. In connection with any offering
involving an underwriting of shares of the Company's capital stock, the Company
shall not be required under this Section 1.3 to include any of the Holders'
securities in such underwriting unless they accept the customary terms of the
underwriting as reasonably agreed upon between the Company and the underwriters
selected by it (or by other persons entitled to select the underwriters) and
enter into an underwriting agreement in customary form with an underwriter or
underwriters selected by the Company, provided that if the underwriters
determine in good faith that marketing factors require a limitation on the
number of shares to be underwritten, then the Company shall be required to
include in the offering only that number of such securities, including
Registrable Securities, that the underwriters determine in good faith will not
jeopardize the success of the offering (the securities so included to be
apportioned pro rata among the selling Holders and any other selling
shareholders having similar rights according to the total amount of securities
proposed to be included therein by each selling Holder and any other selling
shareholder holding similar rights or in such other proportions as shall
mutually be agreed to by such selling Holders), but in no event shall the amount
of securities of the selling Holders included in the offering be reduced below
twenty-five percent (25%) of the total amount of securities included in such
offering. In no event will shares of any other selling shareholder be included
in such registration if such inclusion would reduce the number of shares which
may be included by Holders without the written consent of Holders of not less
than a majority of the Registrable Securities proposed to be sold in the
offering. If any Holder disapproves of the terms of any such underwriting, such
Holder may elect to withdraw therefrom by written notice to the Company and the
underwriter, delivered at least ten (10) business days prior to the effective
date of the registration statement. Any Registrable Securities excluded or
withdrawn from such underwriting shall be excluded and withdrawn from the
registration. For any Holder which is a partnership or corporation, the
partners, retired partners and shareholders of such Holder, or the estates and
family members of any such partners and retired partners and any trusts for the
benefit of any of the foregoing person shall be deemed to be a single "Holder",
and any pro rata reduction with respect to such "Holder" shall be based upon the
aggregate amount of shares carrying registration rights owned by all entities
and individuals included in such "Holder", as defined in this sentence.

        1.4 FORM S-3 REGISTRATION. In case the Company shall receive from the
Holders of Registrable Securities a written request or requests that the Company
effect a registration on

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<PAGE>   5

Form S-3 and any related qualification or compliance with respect to all or a
part of the Registrable Securities owned by such Holder or Holders, the Company
shall:

           (a) promptly give written notice of the proposed registration, and
any related qualification or compliance, to all other Holders; and

           (b) effect, as soon as practicable, such registration and all such
qualifications and compliances as may be so requested and as would permit or
facilitate the sale and distribution of all or such portion of such Holders'
Registrable Securities as are specified in such request, together with all or
such portion of the Registrable Securities of any other Holders joining in such
request as are specified in a written request given within fifteen (15) days
after receipt of such written notice from the Company; provided, however, that
the Company shall not be obligated to effect any such registration,
qualification or compliance, pursuant to this Section 1.4:

               (i) prior to December 31, 2001;

               (ii) if Form S-3 is not available for such offering by the
Holders;

               (iii) if the Holders, together with the holders of any other
securities of the Company entitled to inclusion in such registration, propose to
sell Registrable Securities and such other securities (if any) at an aggregate
price to the public of less than $5,000,000;

               (iv) if the Company shall furnish to the Holders a certificate
signed by the Chief Executive Officer or Chairman of the Board of the Company
stating that in the good faith judgment of the Board of Directors of the
Company, it would be seriously detrimental to the Company and its shareholders
for such registration to be effected at such time (it being acknowledged that
the Investor's decision to sell or any direct or perceived impact of that
decision on any related business or commercial relationships between the
Investor and the Company shall not be deemed seriously detrimental within the
meaning of this provision), in which event the Company shall have the right to
defer the filing of the Form S-3 registration statement for a period of not more
than ninety (90) days after receipt of the request of the Holder or Holders
under this Section 1.4; provided, however, that the Company shall not use this
right more than once in any twelve month period; or

               (v) if the Company has, within the twelve (12) month period
preceding the date of such request, already effected two registrations on Form
S-3 for the Holders pursuant to this Section 1.4.

           (c) Subject to the foregoing, the Company shall file a registration
statement covering the Registrable Securities and other securities so requested
to be registered as soon as practicable after receipt of the request or requests
of the Holders. Registrations effected pursuant to this Section 1.4 shall not be
counted as demands for registration or registrations effected pursuant to
Sections 1.2 or 1.3.

        1.5 OBLIGATIONS OF THE COMPANY. Whenever required under this Section 1
to effect the registration of any Registrable Securities, the Company shall, as
expeditiously as reasonably possible:

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<PAGE>   6

           (a) prepare and file with the SEC a registration statement with
respect to such Registrable Securities and use all reasonable efforts to cause
such registration statement to become effective, and, upon the request of the
Holders of a majority of the Registrable Securities registered thereunder, keep
such registration statement effective for a period of up to one hundred twenty
(120) days or, if earlier, until the distribution contemplated in the
Registration Statement has been completed;

           (b) prepare and file with the SEC such amendments and supplements to
such registration statement and the prospectus used in connection with such
registration statement as may be necessary to comply with the provisions of the
Securities Act with respect to the disposition of all securities covered by such
registration statement;

           (c) furnish to the Holders such numbers of copies of a prospectus,
including a preliminary prospectus, in conformity with the requirements of the
Securities Act, and such other documents as they may reasonably request in order
to facilitate the disposition of Registrable Securities owned by them;

           (d) use all reasonable efforts to register and qualify the securities
covered by such registration statement under such other securities or Blue Sky
laws of such jurisdictions as shall be reasonably requested by the Holders,
provided that the Company shall not be required in connection therewith or as a
condition thereto to qualify to do business or to file a general consent to
service of process in any such states or jurisdictions;

           (e) in the event of any underwritten public offering, enter into and
perform its obligations under an underwriting agreement, in usual and customary
form, with the managing underwriter of such offering;

           (f) notify each Holder of Registrable Securities covered by such
registration statement at any time when a prospectus relating thereto is
required to be delivered under the Securities Act of the happening of any event
as a result of which the prospectus included in such registration statement, as
then in effect, includes an untrue statement of a material fact or omits to
state a material fact required to be stated therein or necessary to make the
statements therein not misleading in the light of the circumstances then
existing;

           (g) furnish, at the request of a majority of the Holders
participating in the registration, on the date that such Registrable Securities
are delivered to the underwriters for sale, if such securities are being sold
through underwriters, or, if such securities are not being sold through
underwriters, on the date that the registration statement with respect to such
securities becomes effective, (i) an opinion, dated as of such date, of the
recognized securities counsel representing the Company for the purposes of such
registration, in form and substance as is customarily given to underwriters in
an underwritten public offering and reasonably satisfactory to a majority in
interest of the Holders requesting registration, addressed to the underwriters,
if any, and to the Holders requesting registration of Registrable Securities and
(ii) a letter dated as of such date, from the independent certified public
accountants of the Company, in form and customarily given by independent
certified public accountants to underwriters in an underwritten public offering
and reasonably satisfactory to a majority in interest of the Holders requesting
registration, addressed to the underwriters, if any, and if permitted by
applicable accounting standards, to the Holders requesting registration of
Registrable Securities.

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<PAGE>   7

           (h) cause all such Registrable Securities registered pursuant
hereunder to be listed on each securities exchange on which similar securities
issued by the Company are then listed; and

           (i) provide a transfer agent and registrar for all Registrable
Securities registered pursuant hereunder and a CUSIP number for all such
Registrable Securities, in each case not later than the effective date of such
registration.

        1.6 INFORMATION FROM HOLDER. It shall be a condition precedent to the
obligations of the Company to take any action pursuant to this Section 1 with
respect to the Registrable Securities of any selling Holder that such Holder
shall furnish to the Company such information regarding itself, the Registrable
Securities held by it, and the intended method of disposition of such securities
as shall be required to effect the registration of such Holder's Registrable
Securities.

        1.7 EXPENSES OF REGISTRATION. All expenses other than Selling Expenses
incurred in connection with registrations, filings or qualifications pursuant to
Sections 1.2, 1.3 and 1.4, including (without limitation) all registration,
filing and qualification fees, printers' and accounting fees, fees and
disbursements of counsel for the Company shall be borne by the Company. All
Selling Expenses incurred in connection with any registration hereunder, shall
be borne by the holders of the securities so registered pro rata on the basis of
the number of shares so registered. Notwithstanding anything else in this
Section 1.7 to the contrary, in the event a Holder demands registration pursuant
to Sections 1.2 or 1.4 after such time at which all Registrable Securities held
by such Holder (and any affiliate of the Holder with whom such Holder must
aggregate its sales under Rule 144) can in the written opinion of securities
counsel for the Company provided to such Holder be sold in any three (3) month
period without registration in compliance with Rule 144, all registration,
filing and qualification fees, printers' and accounting fees, fees and
disbursements of counsel for the Company incurred in connection with such
registration, filing or qualification shall be borne by such Holder; provided
that such Holder will not bear accounting fees or fees and disbursements of
counsel to the Company that, in the aggregate, exceed $50,000.

        1.8 INDEMNIFICATION. In the event any Registrable Securities are
included in a registration statement under this Section 1:

           (a) The Company will indemnify and hold harmless each Holder, the
partners or officers, directors and shareholders of each Holder, legal counsel
and accountants for each Holder, any underwriter (as defined in the Securities
Act) for such Holder and each person, if any, who controls such Holder or
underwriter within the meaning of the Securities Act or the Exchange Act,
against any losses, claims, damages or liabilities (joint or several) to which
they may become subject under the Securities Act, the Exchange Act or any state
securities laws, insofar as such losses, claims, damages, or liabilities (or
actions in respect thereof) arise out of or are based upon any of the following
statements, omissions or violations (collectively a "Violation"): (i) any untrue
statement or alleged untrue statement of a material fact contained in such
registration statement, including any preliminary prospectus or final prospectus
contained therein or any amendments or supplements thereto, (ii) 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, or (iii) any
violation or alleged violation by the Company of the Securities Act, the
Exchange Act, any state securities laws or any rule or regulation promulgated
under the

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Securities Act, the Exchange Act or any state securities laws; and the Company
will reimburse each such Holder or controlling person as incurred for any legal
or other expenses reasonably incurred by them in connection with investigating
or defending any such loss, claim, damage, liability or action; provided,
however, that the indemnity agreement contained in this subsection l.8(a) shall
not apply to amounts paid in settlement of any such loss, claim, damage,
liability or action if such settlement is effected without the consent of the
Company (which consent shall not be unreasonably withheld), nor shall the
Company be liable in any such case for any such loss, claim, damage, liability
or action to the extent that it arises out of or is based upon a Violation that
occurs in reliance upon and in conformity with written information furnished
expressly for use in connection with such registration by any such Holder,
underwriter or controlling person; provided further, however, that the foregoing
indemnity agreement with respect to any preliminary prospectus shall not inure
to the benefit of any Holder or underwriter, or any person controlling such
Holder or underwriter, from whom the person asserting any such losses, claims,
damages or liabilities purchased shares in the offering, if a copy of the
prospectus (as then amended or supplemented if the Company shall have furnished
any amendments or supplements thereto) was not sent or given by or on behalf of
such Holder or underwriter to such person, if required by law so to have been
delivered, at or prior to the written confirmation of the sale of the shares to
such person, and if the prospectus (as so amended or supplemented) would have
cured the defect giving rise to such loss, claim, damage or liability.

           (b) Each selling Holder will indemnify and hold harmless the Company,
each of its directors, each of its officers who has signed the registration
statement, each person, if any, who controls the Company within the meaning of
the Securities Act, legal counsel and accountants for the Company, any
underwriter, any other Holder selling securities in such registration statement
and any controlling person of any such underwriter or other Holder, against any
losses, claims, damages or liabilities (joint or several) to which any of the
foregoing persons may become subject, under the Securities Act, the Exchange Act
or any state securities laws, insofar as such losses, claims, damages or
liabilities (or actions in respect thereto) arise out of or are based upon any
Violation, in each case to the extent (and only to the extent) that such
Violation occurs in reliance upon and in conformity with written information
furnished by such Holder expressly for use in connection with such registration;
and each such Holder will reimburse any person intended to be indemnified
pursuant to this subsection l.8(b), for any legal or other expenses reasonably
incurred by such person in connection with investigating or defending any such
loss, claim, damage, liability or action; provided, however, that the indemnity
agreement contained in this subsection l.8(b) shall not apply to amounts paid in
settlement of any such loss, claim, damage, liability or action if such
settlement is effected without the consent of the Holder (which consent shall
not be unreasonably withheld), provided that in no event shall any indemnity
under this subsection l.8(b) exceed the gross proceeds from the offering
received by such Holder.

           (c) Promptly after receipt by an indemnified party under this Section
1.8 of notice of the commencement of any action (including any governmental
action), such indemnified party will, if a claim in respect thereof is to be
made against any indemnifying party under this Section 1.8, deliver to the
indemnifying party a written notice of the commencement thereof and the
indemnifying party shall have the right to participate in, and, to the extent
the indemnifying party so desires, jointly with any other indemnifying party
similarly noticed, to assume the defense thereof with counsel mutually
satisfactory to the parties; provided, however,

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<PAGE>   9

that an indemnified party (together with all other indemnified parties that may
be represented without conflict by one counsel) shall have the right to retain
one separate counsel, with the fees and expenses to be paid by the indemnifying
party, if representation of such indemnified party by the counsel retained by
the indemnifying party would be inappropriate due to actual or potential
differing interests between such indemnified party and any other party
represented by such counsel in such proceeding. The failure to deliver written
notice to the indemnifying party within a reasonable time of the commencement of
any such action, if (but only if) prejudicial to its ability to defend such
action, shall relieve such indemnifying party of any liability to the
indemnified party under this Section 1.8, but the omission so to deliver written
notice to the indemnifying party will not relieve it of any liability that it
may have to any indemnified party otherwise than under this Section 1.8.

           (d) If the indemnification provided for in this Section 1.8 is
unavailable to an indemnified party or is insufficient to hold to such
indemnified party harmless against any such loss with respect to any loss,
liability, claim, damage or expense referred to herein, then the indemnifying
party, in lieu of indemnifying such indemnified party hereunder, shall
contribute to the amount paid or payable by such indemnified party as a result
of such loss, liability, claim, damage or expense in such proportion as is
appropriate to reflect the relative fault of the indemnifying party on the one
hand and of the indemnified party on the other in connection with the statements
or omissions that resulted in such loss, liability, claim, damage or expense, as
well as any other relevant equitable considerations. The relative fault of the
indemnifying party and of the indemnified party shall be determined by reference
to, among other things, whether the untrue or alleged untrue statement of a
material fact or the omission to state a material fact relates to information
supplied by the indemnifying party or by the indemnified party and the parties'
relative intent, knowledge, access to information, and opportunity to correct or
prevent such statement or omission; provided that in no event shall any Holder
be required to contribute an amount that exceeds the proceeds received by such
Holder from the Offering.

           (e) Notwithstanding the foregoing, to the extent that the provisions
on indemnification and contribution contained in any underwriting agreement
entered into in connection with an underwritten public offering are in conflict
with the foregoing provisions, the provisions in the underwriting agreement
shall control.

           (f) The obligations of the Company and Holders under this Section 1.8
shall survive the completion of any offering of Registrable Securities in a
registration statement under this Section 1, and the termination of this
agreement. No Indemnifying Party, in the defense of any such claim or
litigation, shall, except with the consent of each Indemnified Party, consent to
entry of any judgment or enter into any settlement which does not include as an
unconditional term thereof the giving by the claimant or plaintiff to such
Indemnified Party of a release from all liability in respect to such claim or
litigation.

        1.9 REPORTS UNDER SECURITIES EXCHANGE ACT OF 1934. With a view to making
available to the Holders the benefits of Rule 144 and any other rule or
regulation of the SEC that may at any time permit a Holder to sell securities of
the Company to the public without registration or pursuant to a registration on
Form S-3, the Company agrees to:

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<PAGE>   10

           (a) make and keep public information available, as those terms are
understood and defined in Rule 144, at all times while the Company is a
reporting issuer under the Exchange Act;

           (b) file with the SEC in a timely manner all reports and other
documents required of the Company under the Securities Act and the Exchange Act;
and

           (c) furnish to any Holder, so long as the Holder owns any Registrable
Securities, forthwith upon request (i) a written statement by the Company that
it has complied with the reporting requirements of Rule 144, the Securities Act
and the Exchange Act (at all times it remains subject to such reporting
requirements), or that it qualifies as a registrant whose securities may be
resold pursuant to Form S-3, (ii) a copy of the most recent annual or quarterly
report of the Company and such other reports and documents so filed by the
Company, and (iii) such other information as may be reasonably requested in
availing any Holder of any rule or regulation of the SEC that permits the
selling of any such securities without registration or pursuant to such form.

        1.10 ASSIGNMENT OF REGISTRATION RIGHTS. The rights to cause the Company
to register Registrable Securities pursuant to Sections 1.2, 1.3 and 1.4 hereof
may be assigned by a Holder to a transferee or assignee of such securities that
is a subsidiary of the Investor or the ultimate parent of the Investor or any
other subsidiary of such parent. The right to cause the Company to register
Registrable Securities under Section 1.3 hereof may be assigned by the Holder to
one or more unaffiliated transferees that after such assignment or transfer,
hold at least that number of shares of Registrable Securities equal to one
percent (1%) of the outstanding capital stock of the Company (as measured at the
time of such transfer); provided: (a) the Company shall, within a reasonable
time after such transfer, be furnished with written notice of the name and
address of such transferee or assignee and the securities with respect to which
such registration rights are being assigned; and (b) such transferee or assignee
shall agree in writing to be bound by and subject to the terms and conditions of
Section 1 of this Agreement. The rights to cause the Company to register
Registrable Securities pursuant to Section 1.2 may not be assigned by the
Investor to an unaffiliated transferee.

2. COVENANTS OF THE COMPANY AND THE INVESTOR.

        2.1 COVENANTS OF THE COMPANY

           (a) Pre-emptive Right . Until such time as the Investor has sold
shares in the Company such that the Investor owns not less than five percent
(5%) of the outstanding capital stock of the Company, subject to the terms and
conditions specified in this Section 2.1(a) the Investor shall be entitled to a
pre-emptive right with respect to future sales by the Company of its Shares (as
hereinafter defined). Each time the Company proposes to offer any shares of, or
securities convertible into or exchangeable or exercisable for any shares of,
any class of its capital stock ("Shares"), the Company shall notify the Investor
in accordance with the following provisions.

               (i) The Company shall deliver a notice in accordance with Section
3.5 ("Notice") to the Investor stating (1) its bona fide intention to offer such
Shares, (2) the number

                                      -10-

<PAGE>   11

of such Shares to be offered, and (3) the price and terms upon which it proposes
to offer such Shares.

               (ii) By written notification received by the Company, within
twenty (20) calendar days after receipt of the Notice, the Investor may elect to
purchase or obtain, at the price and on the terms specified in the Notice, up to
that portion of such Shares that equals the proportion that the number of shares
of Registrable Securities issued and held by the Investor bears to the total
number of shares of Common Stock of the Company then outstanding (assuming full
conversion of all convertible securities).

               (iii) If all Shares that the Investor is entitled to obtain
pursuant to subsection 2.1(a)(ii) are not elected to be obtained as provided in
subsection 2.1(a)(ii) hereof, the Company may, during the ninety (90) day period
following the expiration of the period provided in subsection 2.1(a)(ii) hereof,
offer the remaining unsubscribed portion of such Shares either: (1) in a private
offering to any person or persons at a price not less than, and upon terms no
more favorable to the offeree than those specified in the Notice, or (2)
pursuant to a registered offering. If the Company does not either enter into an
agreement for the issue and sale of the Shares within such period, the right
provided hereunder shall be deemed to be revived and such Shares shall not be
offered unless first reoffered to the Investor in accordance herewith.

               (iv) The right of first offer in this paragraph 2.1(a) shall not
be applicable to (1) the issuance or sale of shares of Common Stock (or options
therefor) to employees, directors and consultants for the primary purpose of
soliciting or retaining their services, (2) the issuance of securities pursuant
to the conversion or exercise of convertible or exercisable securities, (3) the
issuance of securities in connection with a bona fide business acquisition of or
by the Company, whether by merger, consolidation, sale of assets, sale or
exchange of stock or otherwise or (4) the issuance of stock, warrants or other
securities or rights to persons or entities with which the Company has business
relationships provided such issuances are for other than primarily equity
financing purposes.

               (v) In the event of an issue or sale of Common Stock contemplated
by clause (iv) above after the close of business on June 25, 2001, the Investor
shall have the right exercisable during the initial ten Business Days after the
end of each fiscal quarter, commencing September 30, 2001 to purchase additional
shares of Common Stock sufficient to retain its percentage ownership interest in
the Company's outstanding common stock at a price per share equal to the Average
Closing Price in effect on the last trading day of such fiscal quarter. For
purposes of this clause (v), the "Average Closing Price" means as of any date
the average of the last reported sales prices of the shares of Common Stock on
the Nasdaq National Market (or other exchange in which the shares are then
listed) for the ten (10) consecutive trading days ending on the date specified,
or if such date is not a trading day, on the previous trading day and "Business
Day" means any day other than a Saturday or Sunday or any on which commercial
banks in Seattle, Washington or Helsinki, Finland are authorized or obligated by
law to close.

               (b) Reservation of Common Stock. The Company will at all times
reserve and keep available, solely for issuance and delivery upon the exercise
of the Warrant, all Common Stock issuable from time to time upon such exercise.

                                      -11-

<PAGE>   12

               (c) Board Representation. Promptly following the execution and
delivery of this Agreement, the Company shall take all necessary steps to
appoint the Investor's designee as a member of the Company's Board of Directors,
to serve until the Company's next annual shareholders' meeting at which time the
Company will nominate such designee in its proxy statement to be elected by the
shareholders to serve for a full term as a member of the Board of Directors. As
long as the Investor has not sold shares such that the Investor holds less than
five percent (5%) of the outstanding capital stock of the Company, the Company
shall use its best efforts to cause and maintain the election to the Board of
Directors of a representative designated by the Investor.

               (d) Reimbursement of Expenses For Attending Board Meetings. The
Company will reimburse the director nominated by the Investor for reasonable
expenses (including airfare, lodging and other travel expenses) incurred in
connection with attending meetings of the Company's Board of Directors. The
director nominated by the Investor shall waive any director's fees, options or
similar compensation payable by the Company to members of the Board of Directors
for service as a director.

               (e) Inspection Rights; Confidentiality. The Investor will have
the right to receive all business information provided to the Company's Board of
Directors in connection with each meeting of the Board of Directors promptly
following the meeting at which such information is furnished to the Board of
Directors. The Investor shall have the right to discuss the affairs, finances
and accounts of the Company or any of its subsidiaries with the Company's
executive officers, and to review such information as is reasonably requested
all at such reasonable times and as often as may be reasonably requested, but
not more than once each calendar quarter; provided, however, that the Company
shall not be obligated under this Section 2.1(e) to furnish information to the
extent that the Board of Directors determines in good faith that furnishing such
information would be a violation of the Board's fiduciary duties

        2.2 COVENANTS OF THE INVESTOR.

               (a) Business Combination. The Investor covenants to and agrees
with the Company that, for a period of two years from the date of this
Agreement, the Investor will not act in concert with another party to effect a
business combination involving, or sale of material assets of, the Company
(including any soliciting of proxies designed to achieve such a transaction),
except in the event of a third party Change-in-Control Transaction.

               (b) Accumulation of Shares. The Investor covenants to and agrees
with the Company that, for a period of two years from the date of this
Agreement, the Investor shall not, without the prior written consent of the
Company, increase its ownership interest in the Company, directly or indirectly,
other than as a result of: (i) the Investor exercising the Warrant in whole in
part, (ii) stock splits, dividends, rights offerings and recapitalizations;
(iii) any decrease in the total number of outstanding shares of the Company; and
(iv) a Change-in-Control Transaction; provided, however, the Investor may
acquire additional shares of the Company's capital stock in the event any third
party or group acquires an ownership interest in the Company that would exceed
the Investor's, provided that the Investor shall only be allowed to acquire that
number of shares necessary to have an equal ownership interest as such third
party or group.

                                      -12-

<PAGE>   13

               (c) Exception. Nothing in Section 2.2(a) or 2.2(b) or elsewhere
in this Agreement, shall be deemed in any way to prohibit or limit: (i) any
lawful action taken by the Investor in direct competition with any bona fide
offer by a third party seeking a Change-in-Control Transaction with the Company,
(ii) any lawful action of any director nominated by the Investor and serving as
a member of the Company's Board of Directors acting in such capacity; and (iii)
any lawful action by the Investor or any of its affiliates, officers, directors
or employees in connection with ongoing or prospective business relationships
with or affecting the business relationships with or affecting the Company or
any of its affiliates.

               (d) Private Sale of Shares to Third Party. The Investor shall
not, without the prior written consent of the Company's Board of Directors,
transfer any Registrable Securities in a private sale to a third-party investor
or "group" (as defined for purposes of Section 13(d) of the Exchange Act) if, as
a result of such transfer, any individual or "group" would acquire more than two
percent (2%) of the outstanding capital stock of the Company.

               (e) Sale of Shares to the Public. In the event the Investor sells
shares of the Company's Common Stock in the public market other than pursuant to
Sections 1.2, 1.3 or 1.4 hereof, the Investor shall limit those sales to either
(i) sales in "brokers' transactions" within the meaning of Rule 144; or (ii) the
sale of shares to a third-party investor or "group", provided that any
individual investor or "group" would not acquire more than two percent (2%) of
the outstanding capital stock of the Company.

               (f) Change-in-Control Transactions. In the event the Warrant is
accelerated in connection with a Change-in-Control Transaction, and the Investor
exercises the Warrant upon such accelerated vesting, any shares acquired by the
Investor upon such exercise shall be voted, at any shareholder vote on such
Change-in-Control Transaction, in proportion to the other outstanding shares
entitled to vote, such that those shares held by the Investor shall not impact
the outcome of such shareholder vote. Notwithstanding the above, shares held by
the Investors other than as a result of the exercise of an accelerated Warrant,
may be voted at the sole discretion of the Investor.

               (g) Confidentiality. The Investor acknowledges that the Company
may pursuant to Section 2.1(e), above, provide it with information that is
confidential or proprietary to the Company and agrees that all such information
designated as confidential will be held and treated by it in confidence and it
will not disclose such information in any manner whatsoever, in whole or in
part, to any person (other than an agent, attorney or employee of the Investor)
without the Company's prior written consent. The Investor agrees that any
confidential information may be used by the Investor and its agents, attorneys
and employees only in connection with the Investor's investment in the Company
and any commercial arrangements between them. None of the following will
constitute confidential information for purposes of this agreement: (i)
information already in the Investor's possession and not received in confidence
from the Company; (ii) information that now or in the future is made available
to the Investor by a third party which, to the Investor's knowledge, has no
obligation of confidentiality to the Company with respect to such information;
(iii) information which is or becomes publicly available through no fault of the
Investor or (iv) information that is independently developed by Nokia without
reference to, or use of, any confidential information.

                                      -13-

<PAGE>   14

3. MISCELLANEOUS.

        3.1 SUCCESSORS AND ASSIGNS. Except as otherwise provided herein, the
terms and conditions of this Agreement shall inure to the benefit of and be
binding upon the respective successors and assigns of the parties (including
transferees of any shares of Registrable Securities). Nothing in this Agreement,
express or implied, is intended to confer upon any party other than the parties
hereto or their respective successors and assigns any rights, remedies,
obligations, or liabilities under or by reason of this Agreement, except as
expressly provided in this Agreement.

        3.2 GOVERNING LAW. This Agreement shall be governed by and construed
under the laws of the State of New York as applied to agreements among New York
residents entered into and to be performed entirely within New York.

        3.3 COUNTERPARTS. This Agreement may be executed in two or more
counterparts, each of which shall be deemed an original, but all of which
together shall constitute one and the same instrument.

        3.4 TITLES AND SUBTITLES. The titles and subtitles used in this
Agreement are used for convenience only and are not to be considered in
construing or interpreting this Agreement.

        3.5 NOTICES. Unless otherwise provided, any notice required or permitted
under this Agreement shall be given in writing and shall be deemed effectively
given upon personal delivery to the party to be notified or upon delivery by
confirmed facsimile transmission, nationally recognized overnight courier
service, or upon deposit with the United States Post Office, by registered or
certified mail, postage prepaid and addressed to the party to be notified at the
address indicated for such party on the signature page hereof, or at such other
address as such party may designate by ten (10) days' advance written notice to
the other parties.

        3.6 EXPENSES. If any action at law or in equity is necessary to enforce
or interpret the terms of this Agreement, the prevailing party shall be entitled
to reasonable attorneys' fees, costs and necessary disbursements in addition to
any other relief to which such party may be entitled.

        3.7 ENTIRE AGREEMENT: AMENDMENTS AND WAIVERS. This Agreement constitutes
the full and entire understanding and agreement among the parties with regard to
the subjects hereof. Any term of this Agreement may be amended and the
observance of any term of this Agreement may be waived (either generally or in a
particular instance and either retroactively or prospectively), only with the
written consent of the Company and the holders of a majority of the Registrable
Securities. Any amendment or waiver effected in accordance with this paragraph
shall be binding upon each holder of any Registrable Securities, each future
holder of all such Registrable Securities, and the Company.

        3.8 SEVERABILITY. If one or more provisions of this Agreement are held
to be unenforceable under applicable law, such provision shall be excluded from
this Agreement and the balance of the Agreement shall be interpreted as if such
provision were so excluded and shall be enforceable in accordance with its
terms.

        3.9 TERMINATION. This Agreement shall terminate on the latest of (i) the
second anniversary hereof, (ii) the termination of the OEM Agreement (as defined
in the Purchase

                                      -14-

<PAGE>   15

Agreement) or (iii) the termination of the Technology Agreement (as defined in
the Purchase Agreement).

        IN WITNESS WHEREOF, the parties have executed this Investor's Rights
Agreement as of the date first above written.

COMPANY                           F5 NETWORKS, INC.

                                  BY: /s/  John McAdam
                                      ------------------------------------------
                                  John McAdam, President

                         Address: 401 Elliott Avenue West
                                  Seattle, Washington  98119

INVESTOR                          NOKIA FINANCE INTERNATIONAL BV

                                  BY: /s/ Mika Vehvilainen
                                      ------------------------------------------
                                  Mika Vehvilainen,  Attorney-in-fact

                         Address: Strawinskylaan 3111, 1077 ZX
                                  Amsterdam, The Netherlands

                                  With copies to
                                  Nokia Corporation
                                  P.O. Box 226
                                  FIN-00045
                                  NOKIA GROUP
                                  Keilalahdentie 4
                                  FIN-02150
                                  Espoo, Finland
                                  Attn:  Ursula Ranin, Vice President,
                                  General Counsel

                                  and

                                  Nokia Internet Communications
                                  313 Fairchild Drive
                                  Mountain View, California  94043 USA
                                  Attn:  John Robinson, Senior Vice President
                                  and General Manager

                                  Nokia Inc.
                                  6000 Connection Drive
                                  Irving, Texas  75039 USA

                                      -15-

<PAGE>   16

                                  Attn: Richard W. Stimson, Vice President,
                                  Legal Services

                                      -16-

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