F5 NETWORKS, INC.

                            _________ SHARES(1)

                              COMMON STOCK


                           UNDERWRITING AGREEMENT
                           ----------------------

                                                                 _____ __, 1999
HAMBRECHT & QUIST LLC
BANCBOSTON ROBERTSON STEPHENS INC
DAIN RAUSCHER WESSELS, a division of Dain Rauscher Incorporated
  c/o Hambrecht & Quist LLC
  One Bush Street
  San Francisco, CA 94104

Ladies and Gentlemen:

     F5 Networks, Inc., a Washington corporation (herein called the Company),
proposes to issue and sell _________ shares of its authorized but unissued
Common Stock, no par value (herein called the "Common Stock"), and the
shareholder of the Company named in part A of Schedule II hereto (herein
collectively called the "Primary Selling Securityholder") severally proposes to
sell an aggregate of _________ shares of Common Stock of the Company (said
_________ shares of Common Stock being herein called the "Underwritten Stock").
Certain shareholders of the Company named in Part B of Schedule II hereto
("Additional Selling Securityholders," which term shall include, except where
otherwise noted, the shareholder named as an Affiliated Selling Securityholder
in Schedule II hereto, herein called the "Affiliated Selling Securityholder")
propose to grant to the Underwriters (as hereinafter defined) an option to
purchase up to _________ additional shares of Common Stock, said _____ shares
of Common Stock being herein called "Option Stock" and with the Underwritten
Stock herein collectively called the "Stock."  The Common Stock is more fully
described in the Registration Statement and the Prospectus hereinafter
mentioned.  The Primary Selling Securityholder and the Additional Selling
Securityholders shall collectively be referred to herein as the "Selling
Securityholders."

     The Company and the Selling Securityholders severally hereby confirm the
agreements made with respect to the purchase of the Stock by the several
underwriters, for whom you are acting, named in Schedule I hereto (herein
collectively called the Underwriters, which term shall also include any
underwriter purchasing Stock pursuant to Section 3(b) hereof).  You represent
and warrant that you have been authorized by each of the other Underwriters to
enter into this Agreement on its behalf and to act for it in the manner herein
provided.

     1.   REGISTRATION STATEMENT.  The Company has filed with the Securities
and Exchange Commission (herein called the "Commission") a registration
statement on Form S-1 (No.333-75817), including the related preliminary
prospectus, for the registration under the Securities Act of 1933, as amended
(herein called the "Securities Act") of the Stock.  Copies of such registration
statement and of each amendment thereto, if any, including the related
preliminary prospectus (meeting the requirements of Rule 430A of the rules and
regulations of the Commission) heretofore filed by the Company with the
Commission have been delivered to you.

- -----------------
(1)  Plus an option to purchase from the Additional Selling Securityholders up
     to ______ additional shares to cover over-allotments.



     The term Registration Statement as used in this agreement shall mean such 
registration statement, including all exhibits and financial statements, all 
information omitted therefrom in reliance upon Rule 430A and contained in the 
Prospectus referred to below, in the form in which it became effective, and 
any registration statement filed pursuant to Rule 462(b) of the rules and 
regulations of the Commission with respect to the Stock (herein called a "Rule 
462(b) Registration Statement"), and, in the event of any amendment thereto 
after the effective date of such registration statement (herein called the 
"Effective Date"), shall also mean (from and after the effectiveness of such 
amendment) such registration statement as so amended (including any Rule 
462(b) registration statement).  The term Prospectus as used in this Agreement 
shall mean the prospectus relating to the Stock first filed with the 
Commission pursuant to Rule 424(b) and Rule 430A (or if no such filing is 
required, as included in the Registration Statement) and, in the event of any 
supplement or amendment to such prospectus after the Effective Date, shall 
also mean (from and after the filing with the Commission of such supplement or 
the effectiveness of such amendment) such prospectus as so supplemented or 
amended. The term Preliminary Prospectus as used in this Agreement shall mean 
each preliminary prospectus included in such registration statement prior to 
the time it becomes effective.

     The Registration Statement has been declared effective under the Securities
Act, and no post-effective amendment to the Registration Statement has been
filed as of the date of this Agreement. The Company has caused to be delivered
to you copies of each Preliminary Prospectus and has consented to the use of
such copies for the purposes permitted by the Securities Act.

     2.   REPRESENTATIONS AND WARRANTIES OF THE COMPANY AND THE SELLING
SECURITYHOLDERS.

          (a)  The Company hereby represents and warrants as follows:

               (i)   The Company has been duly incorporated and is validly
existing as a corporation in good standing under the laws of the jurisdiction
of its incorporation, has full corporate power and authority to own or lease
its properties and conduct its business as described in the Registration
Statement and the Prospectus and as being conducted, and is duly qualified as
a foreign corporation and in good standing in all jurisdictions in which the
character of the property owned or leased or the nature of the business
transacted by it makes qualification necessary (except where the failure to be
so qualified would not have a material adverse effect on the business,
properties, financial condition or results of operations of the Company (a
"Material Adverse Effect")).

               (ii)  Since the respective dates as of which information is
given in the Registration Statement and the Prospectus, there has not been any
material adverse change in the business, properties, financial condition or
results of operations of the Company whether or not arising from transactions
in the ordinary course of business, other than as set forth in the
Registration Statement and the Prospectus, and since such dates, except in the
ordinary course of business, the Company has not entered into any material
transaction not referred to in the Registration Statement and the Prospectus.

               (iii) The Commission has not issued any order preventing or
suspending the use of any Preliminary Prospectus relating to the proposed
offering of the Stock nor instituted or threatened instituting proceedings for
that purpose.  The Registration Statement and the Prospectus comply, and on
the Closing Date (as hereinafter defined) and any later date on which Option
Stock is to be purchased, the Prospectus will comply, in all material
respects, with the provisions of the Securities Act and the rules and
regulations of the Commission thereunder; on the Effective Date, the
Registration Statement did not contain any untrue statement of a material fact
and did not omit to state any material fact required to be stated therein or
necessary in order to make the statements therein not misleading; and, on the
Effective Date the Prospectus did not and, on the Closing Date and any later
date on which Option Stock is to be purchased, will not contain any 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, not misleading; PROVIDED, HOWEVER, that none of the
representations and warranties in this subparagraph (iii) shall apply to
statements in, or omissions from, the Registration Statement or the Prospectus
made in reliance upon and in conformity with information herein or otherwise
furnished in writing to the Company by or on behalf of the Underwriters for
use in the Registration Statement or the Prospectus.

               (iv)  The Company's authorized, issued and outstanding
capitalization as of March 31, 1999 is as set forth under the caption
Capitalization in the Prospectus.  The Stock is duly and validly

                                    2


authorized, and, when issued and sold to the Underwriters and upon the
delivery of and payment for such shares of the Stock, as provided herein, will
be duly and validly issued, fully paid and nonassessable, and the Underwriters
will receive good and marketable title thereto, free and clear of all liens,
encumbrances, equities, security interests and claims whatsoever.  The capital
stock conforms in all material respects to the description thereof contained
in the Prospectus. No further approval or authority of the shareholders or the
Board of Directors of the Company will be required for the issuance and sale
of the Stock by the Company as contemplated herein or to the knowledge of the
Company for the transfer and sale of the Stock to be sold by the Selling
Securityholders.  The shares of capital stock outstanding prior to the
issuance of the Underwritten Stock and, if any, the Option Stock have been
duly authorized and are validly issued, fully paid and nonassessable.

               (v)   Prior to the Closing Date, the Stock to be issued and sold
under this Agreement will be authorized for listing by the Nasdaq National
Market (herein called "NNM") upon official notice of issuance of the Stock.

               (vi)  Except as disclosed in the Registration Statement, and
except for stock options and shares of Common Stock granted or purchased in
the ordinary course of business after March 31, 1999 pursuant to the equity
incentive plans disclosed in the Registration Statement ("Option Plans"), the
Company does not have outstanding any options or warrants to purchase, or any
preemptive rights, or other rights to subscribe or to purchase or rights of
co-sale, any securities or obligations convertible or exercisable into, or any
contracts or commitments to issue or sell or register for sale, shares of its
capital stock or any such options, warrants, rights, convertible securities,
exercisable securities or obligations.

               (vii)  PricewaterhouseCoopers LLP, who have certified the
consolidated financial statements included in the Registration Statement, have
represented to the Company that they are, and the Company has no reason to
believe that such representation is incorrect, independent public accountants
as required by the Securities Act and the rules and regulations of the
Commission thereunder.

               (viii) The financial statements of the Company, together with
related notes and schedules as set forth in the Registration Statement
("Financial Statements"), present fairly the financial position and the results
of operations of the Company, at the indicated dates and for the indicated
periods. The Financial Statements have been prepared in accordance with
generally accepted accounting principles, consistently applied throughout the
periods involved, and all adjustments necessary for a fair presentation of
results for such periods have been made. The selected and summary financial
data contained in the Registration Statement and the financial information set
forth under the caption "Management's Discussion and Analysis of Financial
Condition and Results of Operations" present fairly the information shown
therein and have been compiled on a basis consistent with the Financial
Statements.  As of March 31, 1999, other than as set forth in the Financial
Statements, the Company has no material liabilities, contingent or otherwise,
other than liabilities incurred in the ordinary course of business and
described in the Registration Statement.

               (ix)   The Company has filed all tax returns required to be
filed and has paid or is contesting in good faith all taxes shown thereon as
due, and there is no tax deficiency that has been or might be asserted against
the Company that will or might have a Material Adverse Effect as of the date
hereof, and all tax liabilities are adequately provided for in the Financial
Statements of the Company as of the date thereof.

               (x)    The Company is not in violation or default under any
provision of its Articles of Incorporation or Bylaws as of the Closing Date
and any later date upon which the Option Stock is purchased, or any indenture,
license, mortgage, lease, franchise, permit, deed of trust or other agreement
or instrument to which the Company is a party or by which the Company or any
of its properties is bound or may be affected, except where such violation or
default would not have a Material Adverse Effect.

               (xi)   The Company has full legal right, power and authority to
enter into this Agreement and perform the transactions contemplated hereby.
This Agreement has been duly authorized, executed and delivered by the Company
and is a valid and binding agreement on the part of the Company, enforceable
in accordance with its terms, except as rights to indemnity and contribution
hereunder may be limited by applicable laws and except as the enforcement
hereof may be limited by applicable bankruptcy, insolvency, reorganization,

                                     3


moratorium or other similar laws affecting creditors' rights generally, or by
general equitable principles. The execution and performance of this Agreement
and the consummation of the transactions herein contemplated, including, but
not limited to, the issuance and sale of the Stock by the Company and the sale
of the Stock by the Selling Securityholders do not and will not: (i) conflict
with, or result in a breach of, or violation of, any of the terms or
provisions of, or constitute, either by itself or upon notice or the passage
of time or both, a default under, any indenture, license, mortgage, lease,
franchise, permit, deed of trust or other agreement or instrument to which the
Company is a party or by which the Company or any of its properties is bound
or may be affected, except where such breach, violation or default would not
have a Material Adverse Effect, (ii) violate any of the provisions of the
Articles of Incorporation or Bylaws of the Company in effect as of the Closing
Date and any later date upon which the Option Stock is purchased, (iii) violate
any order, judgment, statute, rule or regulation applicable to the Company or
of any regulatory, administrative or governmental body or agency having
jurisdiction over the Company or any of its properties or assets, or
(iv) result in the creation or imposition of any lien, charge or encumbrance
upon any assets or properties of the Company.

               (xii)  Any consent, approval, authorization, order,
registration, filing, qualification, license or permit of or with any court or
any public, governmental or regulatory agency or body having jurisdiction over
the Company or any of its properties or assets which is required for the
execution, delivery and performance of this Agreement or the consummation of
the transactions contemplated hereby, including the issuance, sale and
delivery of the Stock to be issued, sold and delivered by the Company
hereunder, have been obtained, including the registration of the Stock under
the Securities Act, listing of the shares on the NNM and such consents,
approvals, authorizations, orders, registrations, filings, qualifications,
licenses and permits as may be required under state securities or Blue Sky
laws in connection with the purchase and distribution of the Stock by the
Underwriters.

               (xiii)  There is no pending or, to the Company's knowledge, 
threatened action, suit, claim or proceeding against the Company or any of its 
officers or any of its properties, assets or rights before any court or 
governmental agency or body or otherwise which (i) might have a Material 
Adverse Effect, (ii) might prevent consummation of the transactions 
contemplated hereby or (iii) is required to be disclosed in the Registration 
Statement and not otherwise disclosed; and there are no contracts or documents 
of the Company that are required to be described in the Prospectus or to be 
filed as exhibits to the Registration Statement which have not been fairly and 
accurately described in all material respects in the Prospectus and filed as 
exhibits to the Registration Statement. The contracts so described in the 
Prospectus are in full force and effect on the date hereof, and neither the 
Company nor, to the Company's knowledge, any other party is in breach of or 
default under any of such contracts.

               (xiv)  Other than as set forth in the Registration Statement,
no claim is pending or, to the Company's knowledge, threatened to the effect
that the present or past operations of the Company infringe upon or conflict
with the rights of others with respect to any licenses, patents, patent
rights, patent applications, trademarks, trademark applications, trade names,
copyrights, trade secrets, drawings, schematics, applications, technology,
know-how and other tangible and intangible proprietary information or material
("Intellectual Property") which would impair the ability of the Company to
conduct its businesses as currently conducted; no claim is pending or, to the
Company's knowledge, threatened regarding the Company's ownership or other
interest in, or rights under, any Intellectual Property which is necessary in
any respect to permit the Company to conduct its businesses as currently
conducted; and, no claim is pending or, to the Company's knowledge, threatened
to the effect that any Intellectual Property owned by or licensed to the
Company is invalid or unenforceable. Except as disclosed in the Prospectus,
the Company owns, or has licensed or otherwise has sufficient rights to, all
Intellectual Property used or proposed to be used in the business of the
Company as currently conducted.  Except as otherwise disclosed in the
Prospectus, no contract, agreement or understanding between the Company and
any other party exists which would impede or prevent in any respect the
continued use by the Company of the entire right, title and interest of the
Company in and to any Intellectual Property used in the business of the
Company as currently conducted.

               (xv)   The Company has not taken and will not take, directly or
indirectly, any action designed to or that might be reasonably expected to
cause or result in stabilization or manipulation of the price of the Common
Stock to facilitate the sale or resale of the Stock.

                                     4


               (xvi)  Except as described in the Prospectus, no holder of
securities of the Company has any rights to the registration of securities of
the Company because of the filing of the Registration Statement or otherwise
in connection with the sale of the Stock contemplated hereby, other than those
that have been expressly waived prior to the date hereof.  There are no
registration rights with respect to the sale and issuance of the Stock, other
than those that have been expressly waived prior to the date hereof.

               (xvii) The Company is not an "investment company" or a company
"controlled" by an "investment company" within the meaning of the Investment
Company Act of 1940, as amended, and the rules and regulations thereunder.

          (b)  Each of the Selling Securityholders, severally and not jointly,
hereby represents and warrants as follows:

               (i)    Such Selling Securityholder has good and marketable
title to all the shares of Stock to be sold by such Selling Securityholder
hereunder, free and clear of all liens, encumbrances, equities, security
interests and claims whatsoever, with full right and authority to deliver the
same hereunder, subject, in the case of each Selling Securityholder, to the
rights of American Stock Transfer & Trust Company, as custodian (herein called
the "Custodian"), and that upon the delivery of and payment for such shares of
the Stock hereunder, the Underwriters will receive good and marketable title
thereto, free and clear of all liens, encumbrances, equities, security
interests and claims whatsoever.

               (ii)   Certificates in negotiable form for the shares of the
Stock to be sold by such Selling Securityholder have been placed in custody
under a Custody Agreement for delivery under this Agreement with the
Custodian; such Selling Securityholder specifically agrees that the shares of
the Stock represented by the certificates so held in custody for such Selling
Securityholder are subject to the interests of the Underwriters and the
Company, that the arrangements made by such Selling Securityholder for such
custody, including the Power of Attorney provided for in such Custody
Agreement, are to that extent irrevocable, and that the obligations of such
Selling Securityholder shall not be terminated by any act of such Selling
Securityholder or by operation of law, whether by the death or incapacity of
such Selling Securityholder (or, in the case of a Selling Securityholder that
is not an individual, the dissolution or liquidation of such Selling
Securityholder) or the occurrence of any other event; if any such death,
incapacity, dissolution, liquidation or other such event should occur before
the delivery of such shares of the Stock hereunder, certificates for such
shares of the Stock shall be delivered by the Custodian in accordance with the
terms and conditions of this Agreement as if such death, incapacity,
dissolution, liquidation or other event had not occurred, regardless of
whether the Custodian shall have received notice of such death, incapacity,
dissolution, liquidation or other event.

          (c)  The Affiliated Selling Securityholder hereby represents and
warrants that such Affiliated Selling Securityholder has reviewed the
Registration Statement and Prospectus and, although such Affiliated Selling
Securityholder has not independently verified the accuracy or completeness of
all the information contained therein, nothing has come to the attention of
such Affiliated Selling Securityholder that would lead such Affiliated Selling
Securityholder to believe that on the Effective Date, the Registration
Statement contained any untrue statement of a material fact or omitted to
state any material fact required to be stated therein or necessary in order to
make the statements therein not misleading; and, on the Effective Date the
Prospectus contained and, on the Closing Date and any later date on which
Option Stock is to be purchased, contains any untrue statement of a material
fact or omitted or omits to state any material fact necessary in order to make
the statements therein, in the light of the circumstances under which they
were made, not misleading; PROVIDED, HOWEVER, that none of the representations
and warranties in this paragraph (c) shall apply to statements in, or omissions
from, the Registration Statement or the Prospectus made in reliance upon and
in conformity with information herein or otherwise furnished in writing to the
Company by or on behalf of the Underwriters for use in the Registration
Statement or the Prospectus.

     3.   PURCHASE OF THE STOCK BY THE UNDERWRITERS.

          (a)  On the basis of the representations and warranties and subject
to the terms and conditions herein set forth, the Company agrees to issue and
sell 2,860,000 shares of the Underwritten Stock to the

                                     5


Underwriters, the Primary Selling Securityholder agrees to sell to the
Underwriters the number of shares of the Underwritten Stock set forth in
Schedule II opposite the name of such Primary Selling Securityholder, and each
of the Underwriters agrees to purchase from the Company and the Primary
Selling Securityholder the respective aggregate number of shares of
Underwritten Stock set forth opposite its name in Schedule I.  The price at
which such shares of Underwritten Stock shall be sold by the Company and the
Primary Selling Securityholder and purchased by the Underwriters shall be
$_______ per share.  The obligation of each Underwriter to the Company and the
Primary Selling Securityholder shall be to purchase from the Company and the
Primary Selling Securityholder that number of shares of the Underwritten Stock
which represents the same proportion of the total number of shares of the
Underwritten Stock to be sold by each of the Company and the Primary Selling
Securityholder pursuant to this Agreement as the number of shares of the
Underwritten Stock set forth opposite the name of such Underwriter in
Schedule I hereto represents of the total number of shares of the Underwritten
Stock to be purchased by all Underwriters pursuant to this Agreement, as
adjusted by Hambrecht & Quist LLC in such manner as Hambrecht & Quist LLC
deems advisable to avoid fractional shares.  In making this Agreement, each
Underwriter is contracting severally and not jointly; except as provided in
paragraphs (b) and (c) of this Section 3, the agreement of each Underwriter is
to purchase only the respective number of shares of the Underwritten Stock
specified in Schedule I.

          (b)  If for any reason one or more of the Underwriters shall fail or
refuse (otherwise than for a reason sufficient to justify the termination of
this Agreement under the provisions of Section 8 or 9 hereof) to purchase and
pay for the number of shares of the Stock agreed to be purchased by such
Underwriter or Underwriters, the Company or the Selling Securityholders shall
immediately give notice thereof to you, and the non-defaulting Underwriters
shall have the right within 24 hours after the receipt by you of such notice to
purchase, or procure one or more other Underwriters to purchase, in such
proportions as may be agreed upon between you and such purchasing Underwriter
or Underwriters and upon the terms herein set forth, all or any part of the
shares of the Stock which such defaulting Underwriter or Underwriters agreed
to purchase.  If the non-defaulting Underwriters fail so to make such
arrangements with respect to all such shares and portion, the number of shares
of the Stock which each non-defaulting Underwriter is otherwise obligated to
purchase under this Agreement shall be automatically increased on a pro rata
basis to absorb the remaining shares and portion which the defaulting
Underwriter or Underwriters agreed to purchase; PROVIDED, HOWEVER, that the
non-defaulting Underwriters shall not be obligated to purchase the shares and
portion which the defaulting Underwriter or Underwriters agreed to purchase if
the aggregate number of such shares of the Stock exceeds 10% of the total
number of shares of the Stock which all Underwriters agreed to purchase
hereunder.  If the total number of shares of the Stock which the defaulting
Underwriter or Underwriters agreed to purchase shall not be purchased or
absorbed in accordance with the two preceding sentences, the Company and the
Selling Securityholders shall have the right, within 24 hours next succeeding
the 24-hour period above referred to, to make arrangements with other
underwriters or purchasers satisfactory to you for purchase of such shares and
portion on the terms herein set forth.  In any such case, either you or the
Company and the Selling Securityholders shall have the right to postpone the
Closing Date determined as provided in Section 5 hereof for not more than seven
business days after the date originally fixed as the Closing Date pursuant to
said Section 5 in order that any necessary changes in the Registration
Statement, the Prospectus or any other documents or arrangements may be made.
If neither the non-defaulting Underwriters nor the Company and the Selling
Securityholders shall make arrangements within the 24-hour periods stated
above for the purchase of all the shares of the Stock which the defaulting
Underwriter or Underwriters agreed to purchase hereunder, this Agreement shall
be terminated without further act or deed and without any liability on the
part of the Company or the Selling Securityholders to any non-defaulting
Underwriter and without any liability on the part of any non-defaulting
Underwriter to the Company or the Selling Securityholders. Nothing in this
paragraph (b), and no action taken hereunder, shall relieve any defaulting
Underwriter from liability in respect of any default of such Underwriter under
this Agreement.

          (c)  On the basis of the representations, warranties and covenants
herein contained, and subject to the terms and conditions herein set forth,
the Additional Selling Securityholders grant an option to the several
Underwriters to purchase, severally and not jointly, up to 450,000 shares in
the aggregate of the Option Stock from such Additional Selling Securityholders
at the same price per share as the Underwriters shall pay for the Underwritten
Stock.  Said option may be exercised only to cover over-allotments in the sale
of the Underwritten Stock by the Underwriters and may be exercised in whole or
in part at any time (but not more than once) on or before the thirtieth day
after the date of this Agreement upon written or telegraphic notice by you to
the Company setting forth the aggregate number of shares of the Option Stock
as to which the several Underwriters are exercising

                                     6



the option.  Delivery of certificates for the shares of Option Stock, and
payment therefor, shall be made as provided in Section 5 hereof.  The number of
shares of the Option Stock to be purchased by each Underwriter shall be the
same percentage of the total number of shares of the Option Stock to be
purchased by the several Underwriters as such Underwriter is purchasing of the
Underwritten Stock, as adjusted by you in such manner as you deem advisable to
avoid fractional shares.

     4.   OFFERING BY UNDERWRITERS.

          (a)  The terms of the initial public offering by the Underwriters of
the Stock to be purchased by them shall be as set forth in the Prospectus.
The Underwriters may from time to time change the public offering price after
the closing of the initial public offering and increase or decrease the
concessions and discounts to dealers as they may determine.

          (b)  The information set forth in the last paragraph on the front
cover page and under "Underwriting" in the Registration Statement, any
Preliminary Prospectus and the Prospectus relating to the Stock filed by the
Company (insofar as such information relates to the Underwriters) constitutes
the only information furnished by the Underwriters to the Company for
inclusion in the Registration Statement, any Preliminary Prospectus, and the
Prospectus, and you on behalf of the respective Underwriters represent and
warrant to the Company that the statements made therein are correct.

     5.   DELIVERY OF AND PAYMENT FOR THE STOCK.

          (a)  Delivery of certificates for the shares of the Underwritten
Stock and the Option Stock (if the option granted by Section 3(c) hereof shall
have been exercised not later than 7:00 A.M., San Francisco time, on the date
two business days preceding the Closing Date), and payment therefor, shall be
made at the office of Cooley Godward LLP, 4205 Carillon Point, Kirkland, WA
98033-7355, at 7:00a.m., San Francisco time, on the fourth business day after
the date of this Agreement, or at such time on such other day, not later than
seven full business days after such fourth business day, as shall be agreed
upon in writing by the Company, the Selling Securityholders and you.  The date
and hour of such delivery and payment (which may be postponed as provided in
Section 3(b) hereof) are herein called the Closing Date.

          (b)  If the option granted by Section 3(c) hereof shall be exercised
after 7:00 a.m., San Francisco time, on the date two business days preceding
the Closing Date, delivery of certificates for the shares of Option Stock, and
payment therefor, shall be made at the office of Cooley Godward LLP,
4205 Carillon Point, Kirkland, WA 98033-7355, at 7:00a.m., San Francisco time,
on the third business day after the exercise of such option.

          (c)  Payment for the Stock purchased from the Company shall be made
to the Company or its order and payment for the Stock purchased from the
Selling Securityholders shall be made to the Custodian, for the account of the
Selling Securityholders, in each case by wire transfer of immediately
available funds. Such payment shall be made upon delivery of certificates for
the Stock to you for the respective accounts of the several Underwriters
against receipt therefor signed by you.  Certificates for the Stock to be
delivered to you shall be registered in such name or names and shall be in
such denominations as you may request at least one business day before the
Closing Date, in the case of Underwritten Stock, and at least one business day
prior to the purchase thereof, in the case of the Option Stock.  Such
certificates will be made available to the Underwriters for inspection,
checking and packaging at the offices of Lewco Securities Corporation,
2 Broadway, New York, New York 10004 on the business day prior to the Closing
Date or, in the case of the Option Stock, by 3:00 p.m., New York time, on the
business day preceding the date of purchase.

     It is understood that you, individually and not on behalf of the
Underwriters, may (but shall not be obligated to) make payment to the Company
and the Selling Securityholders for shares to be purchased by any Underwriter
whose check shall not have been received by you on the Closing Date or any
later date on which Option Stock is purchased for the account of such
Underwriter.  Any such payment by you shall not relieve such Underwriter from
any of its obligations hereunder.

                                    7



     6.   FURTHER AGREEMENTS OF THE COMPANY.  The Company covenants and agrees
as follows:

          (a)  The Company will (i) prepare and timely file with the Commission
under Rule 424(b) a Prospectus containing information previously omitted at the
time of effectiveness of the Registration Statement in reliance on Rule 430A
and (ii) not file any amendment to the Registration Statement or supplement to
the Prospectus of which you shall not previously have been advised and
furnished with a copy or to which you shall have reasonably objected in
writing or which is not in compliance with the Securities Act or the rules and
regulations of the Commission.

          (b)  The Company will promptly notify each Underwriter in the event
of (i) the request by the Commission for amendment of the Registration
Statement or for supplement to the Prospectus or for any additional
information, (ii) the issuance by the Commission of any stop order suspending
the effectiveness of the Registration Statement, (iii) the institution or
notice of intended institution of any action or proceeding for that purpose,
(iv) the receipt by the Company of any notification with respect to the
suspension of the qualification of the Stock for sale in any jurisdiction, or
(v) the receipt by it of notice of the initiation or threatening of any
proceeding for such purpose.  The Company will make every reasonable effort to
prevent the issuance of such a stop order and, if such an order shall at any
time be issued, to obtain the withdrawal thereof at the earliest possible
moment.

          (c)  The Company will (i) on or before the Closing Date, deliver to
you a signed copy of the Registration Statement as originally filed and of
each amendment thereto filed prior to the time the Registration Statement
becomes effective and, promptly upon the filing thereof, a signed copy of each
post-effective amendment, if any, to the Registration Statement (together
with, in each case, all exhibits thereto unless previously furnished to you)
and will also deliver to you, for distribution to the Underwriters, a
sufficient number of additional conformed copies of each of the foregoing (but
without exhibits) so that one copy of each may be distributed to each
Underwriter, (ii) as promptly as possible deliver to you and send to the
several Underwriters, at such office or offices as you may designate, as many
copies of the Prospectus as you may reasonably request, and (iii) thereafter
from time to time during the period in which a prospectus is required by law
to be delivered by an Underwriter or dealer, likewise send to the Underwriters
as many additional copies of the Prospectus and as many copies of any
supplement to the Prospectus and of any amended prospectus, filed by the
Company with the Commission, as you may reasonably request for the purposes
contemplated by the Securities Act.

          (d)  If at any time during the period in which a prospectus is
required by law to be delivered by an Underwriter or dealer any event relating
to or affecting the Company, or of which the Company shall be advised in
writing by you, shall occur as a result of which it is necessary, in the
opinion of counsel for the Company or of counsel for the Underwriters, to
supplement or amend the Prospectus in order to make the Prospectus not
misleading in the light of the circumstances existing at the time it is
delivered to a purchaser of the Stock, the Company will forthwith prepare and
file with the Commission a supplement to the Prospectus or an amended
prospectus so that the Prospectus as so supplemented or amended will not
contain any 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 existing at the time such Prospectus is delivered to such
purchaser, not misleading.  If, after the initial public offering of the Stock
by the Underwriters and during such period, the Underwriters shall propose to
vary the terms of offering thereof by reason of changes in general market
conditions or otherwise, you will advise the Company in writing of the
proposed variation, and, if in the opinion either of counsel for the Company
or of counsel for the Underwriters such proposed variation requires that the
Prospectus be supplemented or amended, the Company will forthwith prepare and
file with the Commission a supplement to the Prospectus or an amended
prospectus setting forth such variation.  The Company authorizes the
Underwriters and all dealers to whom any of the Stock may be sold by the
several Underwriters to use the Prospectus, as from time to time amended or
supplemented, in connection with the sale of the Stock in accordance with the
applicable provisions of the Securities Act and the applicable rules and
regulations thereunder for such period.

          (e)  Prior to the filing thereof with the Commission, the Company
will submit to you, for your information, a copy of any post-effective
amendment to the Registration Statement and any supplement to the Prospectus
or any amended prospectus proposed to be filed.

          (f)  The Company will cooperate, when and as requested by you, in
the qualification of the Stock for offer and sale under the securities or blue
sky laws of such jurisdictions as you may designate and, during

                                     8


the period in which a prospectus is required by law to be delivered by an
Underwriter or dealer, in keeping such qualifications in good standing under
said securities or blue sky laws; PROVIDED, HOWEVER, that the Company shall
not be obligated to file any general consent to service of process or to
qualify as a foreign corporation in any jurisdiction in which it is not so
qualified.  The Company will, from time to time, prepare and file such
statements, reports, and other documents as are or may be required to continue
such qualifications in effect for so long a period as you may reasonably
request for distribution of the Stock.

          (g)  During a period of five years commencing with the date hereof,
the Company will furnish to you, and to each Underwriter who may so request in
writing, copies of all periodic and special reports furnished to shareholders
of the Company and of all information, documents and reports filed with the
Commission.

          (h)  Not later than the 45th day following the end of the fiscal
quarter first occurring after the first anniversary of the Effective Date, the
Company will make generally available to its security holders an earnings
statement in accordance with Section 11(a) of the Securities Act and Rule 158
thereunder.

          (i)  The Company agrees to pay all costs and expenses incident to
the performance of the obligations of the Company and the Selling
Securityholders under this Agreement, including all costs and expenses
incident to (i) the preparation, printing and filing with the Commission and
the National Association of Securities Dealers, Inc. ("NASD") of the
Registration Statement, any Preliminary Prospectus and the Prospectus, (ii) the
furnishing to the Underwriters of copies of any Preliminary Prospectus and of
the several documents required by paragraph (c) of this Section 6 to be so
furnished, (iii) the printing of this Agreement and related documents delivered
to the Underwriters, (iv) the preparation, printing and filing of all
supplements and amendments to the Prospectus referred to in paragraph (d) of
this Section 6, (v) the furnishing to you and the Underwriters of the reports
and information referred to in paragraph (g) of this Section 6 and (vi) the
printing and issuance of stock certificates, including the transfer agents
fees.  The Selling Securityholders will pay any transfer taxes incident to the
transfer to the Underwriters of the shares of Stock being sold by the Selling
Securityholders.

          (j)  The Company agrees to reimburse you, for the account of the
several Underwriters, for blue sky fees and related disbursements (including
counsel fees and disbursements and cost of printing memoranda for the
Underwriters) paid by or for the account of the Underwriters or their counsel
in qualifying the Stock under state securities or blue sky laws and in the
review of the offering by the NASD.

          (k)  The Company hereby agrees that, without the prior written
consent of Hambrecht & Quist LLC on behalf of the Underwriters, the Company
will not, for a period of 180 days following the effective date of the
Registration Statement, directly or indirectly, sell, offer, contract to sell,
transfer the economic risk of ownership in, make any short sale, pledge or
otherwise dispose of any shares of Common Stock or any securities convertible
into or exchangeable or exercisable for or any rights to purchase or acquire
Common Stock.  The foregoing sentence shall not apply to (A) the Stock to be
sold to the Underwriters pursuant to this Agreement, (B) Common Stock or
options to purchase Common Stock or other equity incentives granted under the
Option Plans, (C) shares of Common Stock issued by the Company upon the
exercise of options granted under the Option Plans or upon the exercise of
warrants outstanding as of the date hereof, and (D) capital stock issued in
connection with acquisitions entered into by the Company, provided that the
Company shall notify Hambrecht & Quist LLC of such proposed acquisitions at
least five (5) business days prior to entering into a legally binding letter
of intent or a definitive agreement with respect to such acquisitions.

          (l)  If at any time during the 25-day period after the Registration
Statement becomes effective any rumor, publication or event relating to or
affecting the Company shall occur as a result of which in your opinion the
market price for the Stock has been or is likely to be materially affected
(regardless of whether such rumor, publication or event necessitates a
supplement to or amendment of the Prospectus), the Company will, after written
notice from you advising the Company to the effect set forth above, forthwith
prepare, consult with you concerning the substance of, and disseminate a press
release or other public statement, reasonably satisfactory to you, responding
to or commenting on such rumor, publication or event.

          (m)  The Company is familiar with the Investment Company Act of
1940, as amended, and has in the past conducted its affairs, and will in the
future conduct its affairs, in such a manner to ensure that the Company was
not and will not be an "investment company" or a company "controlled" by an
"investment

                                     9


company" within the meaning of the Investment Company Act of 1940, as amended,
and the rules and regulations thereunder.

     7.   INDEMNIFICATION AND CONTRIBUTION.

          (a)  The Company agrees to indemnify and hold harmless each
Underwriter and each person (including each partner or officer thereof) who
controls any Underwriter within the meaning of Section 15 of the Securities Act
from and against any and all losses, claims, damages or liabilities, joint or
several, to which such indemnified parties or any of them may become subject
under the Securities Act, the Securities Exchange Act of 1934, as amended
(herein called the Exchange Act), or the common law or otherwise, and the
Company agrees to reimburse each such Underwriter and controlling person for
any legal or other expenses (including, except as otherwise hereinafter
provided, reasonable fees and disbursements of counsel) incurred by the
respective indemnified parties in connection with defending against any such
losses, claims, damages or liabilities or in connection with any investigation
or inquiry of, or other proceeding which may be brought against, the
respective indemnified parties, in each case arising out of or based upon
(i) any untrue statement or alleged untrue statement of a material fact
contained in the Registration Statement (including the Prospectus as part
thereof and any Rule 462(b) registration statement) or any post-effective
amendment thereto (including any Rule 462(b) registration statement), or 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
(ii) any untrue statement or alleged untrue statement of a material fact
contained in any Preliminary Prospectus or the Prospectus (as amended or as
supplemented if the Company shall have filed with the Commission any amendment
thereof or supplement thereto) or the omission or alleged omission to state
therein a material fact necessary in order to make the statements therein, in
the light of the circumstances under which they were made, not misleading;
PROVIDED, HOWEVER, that (1) the indemnity agreements of the Company contained
in this paragraph (a) shall not apply to any such losses, claims, damages,
liabilities or expenses if such statement or omission was made in reliance
upon and in conformity with information furnished as herein stated or
otherwise furnished in writing to the Company by or on behalf of any
Underwriter for use in any Preliminary Prospectus or the Registration
Statement or the Prospectus or any such amendment thereof or supplement
thereto and (2) the indemnity agreement contained in this paragraph (a) with
respect to any Preliminary Prospectus shall not inure to the benefit of any
Underwriter from whom the person asserting any such losses, claims, damages,
liabilities or expenses purchased the Stock which is the subject thereof (or
to the benefit of any person controlling such Underwriter) if at or prior to
the written confirmation of the sale of such Stock a copy of the Prospectus
(or the Prospectus as amended or supplemented) was not sent or delivered to
such person and the untrue statement or omission of a material fact contained
in such Preliminary Prospectus was corrected in the Prospectus (or the
Prospectus as amended or supplemented) unless the failure is the result of
noncompliance by the Company with paragraph (c) of Section 6 hereof.  The
indemnity agreements of the Company contained in this paragraph (a) and the
representations and warranties of the Company contained in Section 2 hereof
shall remain operative and in full force and effect regardless of any
investigation made by or on behalf of any indemnified party and shall survive
the delivery of and payment for the Stock.

          (b)  Subject to the provisions of paragraph (g) of this Section 7, the
Selling Securityholders severally and not jointly agree to indemnify and hold
harmless each Underwriter and each person (including each partner or officer
thereof) who controls any Underwriter within the meaning of Section 15 of the
Securities Act from and against any and all losses, claims, damages or
liabilities, joint or several, to which such indemnified parties or any of
them may become subject under the Securities Act, the Exchange Act or the
common law or otherwise, and the Selling Securityholders severally and not
jointly agree to reimburse each such Underwriter and each person (including
each partner or officer thereof) who controls any Underwriter within the
meaning of Section 15 of the Securities Act for any legal or other expenses
(including, except as otherwise hereinafter provided, reasonable fees and
disbursements of counsel) incurred by the respective indemnified parties in
connection with defending against any such losses, claims, damages or
liabilities or in connection with any investigation or inquiry of, or other
proceeding which may be brought against, the respective indemnified parties,
in each case arising out of or based upon (i) information pertaining to such
Selling Securityholder furnished by or on behalf of such Selling
Securityholder expressly for use in any Preliminary Prospectus or the
Registration Statement or the Prospectus or any such amendment thereof or
supplement thereto, (ii) facts that would constitute a breach of any
representation or warranty of such Selling Securityholder set forth in
Section 2(b) hereof, or (iii) in the case of the Affiliated Selling
Securityholder, facts that would constitute a breach of any representation or
warranty of such Affiliated Selling Securityholder set forth in Section 2(c)
hereof. The indemnity agreements of the Selling Securityholders contained 

                                     10


in this paragraph (b) and the representations and warranties of the Selling
Securityholders contained in Section 2 hereof shall remain operative and in full
force and effect regardless of any investigation made by or on behalf of any
indemnified party and shall survive the delivery of and payment for the Stock.

          (c)  Each Underwriter severally agrees to indemnify and hold
harmless the Company and the Selling Securityholder, each of its officers who
signs the Registration Statement on his own behalf or pursuant to a power of
attorney, each of its directors, each other Underwriter and each person
(including each partner or officer thereof) who controls the Company or any
such other Underwriter within the meaning of Section 15 of the Securities Act
and the Selling Securityholders, from and against any and all losses, claims,
damages or liabilities, joint or several, to which such indemnified parties or
any of them may become subject under the Securities Act, the Exchange Act, or
the common law or otherwise and to reimburse each of them for any legal or
other expenses (including, except as otherwise hereinafter provided,
reasonable fees and disbursements of counsel) incurred by the respective
indemnified parties in connection with defending against any such losses,
claims, damages or liabilities or in connection with any investigation or
inquiry of, or other proceeding which may be brought against, the respective
indemnified parties, in each case arising out of or based upon (i) any untrue
statement or alleged untrue statement of a material fact contained in the
Registration Statement (including the Prospectus as part thereof and any
Rule 462(b) registration statement) or any post-effective amendment thereto
(including any Rule 462(b) registration statement) or 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 (ii) any untrue
statement or alleged untrue statement of a material fact contained in the
Prospectus (as amended or as supplemented if the Company shall have filed with
the Commission any amendment thereof or supplement thereto) or the omission or
alleged omission to state therein a material fact necessary in order to make
the statements therein, in the light of the circumstances under which they
were made, not misleading, if such statement or omission was made in reliance
upon and in conformity with information furnished as herein stated or
otherwise furnished in writing to the Company by or on behalf of such
indemnifying Underwriter for use in the Registration Statement or the
Prospectus or any such amendment thereof or supplement thereto.  The indemnity
agreement of each Underwriter contained in this paragraph (c) shall remain
operative and in full force and effect regardless of any investigation made by
or on behalf of any indemnified party and shall survive the delivery of and
payment for the Stock.

          (d)  Each party indemnified under the provisions of paragraphs (a),
(b) and (c) of this Section 7 agrees that, upon the service of a summons or
other initial legal process upon it in any action or suit instituted against
it or upon its receipt of written notification of the commencement of any
investigation or inquiry of, or proceeding against, it in respect of which
indemnity may be sought on account of any indemnity agreement contained in
such paragraphs, it will promptly give written notice (herein called the
Notice) of such service or notification to the party or parties from whom
indemnification may be sought hereunder.  No indemnification provided for in
such paragraphs shall be available to any party who shall fail so to give the
Notice if the party to whom such Notice was not given was unaware of the
action, suit, investigation, inquiry or proceeding to which the Notice would
have related and was prejudiced by the failure to give the Notice, but the
omission so to notify such indemnifying party or parties of any such service
or notification shall not relieve such indemnifying party or parties from any
liability which it or they may have to the indemnified party for contribution
or otherwise than on account of such indemnity agreement.  Any indemnifying
party shall be entitled at its own expense to participate in the defense of
any action, suit or proceeding against, or investigation or inquiry of, an
indemnified party.  Any indemnifying party shall be entitled, if it so elects
within a reasonable time after receipt of the Notice by giving written notice
(herein called the Notice of Defense) to the indemnified party, to assume
(alone or in conjunction with any other indemnifying party or parties) the
entire defense of such action, suit, investigation, inquiry or proceeding, in
which event such defense shall be conducted, at the expense of the
indemnifying party or parties, by counsel chosen by such indemnifying party or
parties and reasonably satisfactory to the indemnified party or parties;
PROVIDED, HOWEVER, that (i) if the indemnified party or parties reasonably
determine that there may be a conflict between the positions of the
indemnifying party or parties and of the indemnified party or parties in
conducting the defense of such action, suit, investigation, inquiry or
proceeding or that there may be legal defenses available to such indemnified
party or parties different from or in addition to those available to the
indemnifying party or parties, then counsel for the indemnified party or
parties shall be entitled to conduct the defense to the extent reasonably
determined by such counsel to be necessary to protect the interests of the 
indemnified party or parties and (ii) in any event, the indemnified party or 
parties shall be entitled to have counsel chosen by such indemnified party or 
parties participate in, but not conduct, the defense.  If, within a 
reasonable time after receipt of the Notice, an indemnifying party gives a 
Notice of Defense and the counsel chosen by the indemnifying party or parties 
is reasonably 

                                     11



satisfactory to the indemnified party or parties, the indemnifying party or
parties will not be liable under paragraphs (a) through (d) of this Section 7
for any legal or other expenses subsequently incurred by the indemnified
party or parties in connection with the defense of the action, suit,
investigation, inquiry or proceeding, except that (A) the indemnifying party
or parties shall bear the legal and other expenses incurred in connection
with the conduct of the defense as referred to in clause (i) of the proviso
to the preceding sentence and (B) the indemnifying party or parties shall
bear such other expenses as it or they have authorized to be incurred by the
indemnified party or parties. If, within a reasonable time after receipt of
the Notice, no Notice of Defense has been given, the indemnifying party or
parties shall be responsible for any legal or other expenses incurred by the
indemnified party or parties in connection with the defense of the action,
suit, investigation, inquiry or proceeding.

         (e)  If the indemnification provided for in this Section 7 is
unavailable or insufficient to hold harmless an indemnified party under
paragraph (a), (b) or (c) of this Section 7, then each indemnifying party, in
lieu of indemnifying such indemnified party, shall contribute to the amount
paid or payable by such indemnified party as a result of the losses, claims,
damages or liabilities referred to in paragraph (a), (b) or (c) of this
Section 7(i) in such proportion as is appropriate to reflect the relative
benefits received by each indemnifying party from the offering of the Stock
or (ii) if the allocation provided by clause (i) above is not permitted by
applicable law, in such proportion as is appropriate to reflect not only the
relative benefits referred to in clause (i) above but also the relative fault
of each indemnifying party in connection with the statements or omissions
that 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 Securityholders on
the one hand and the Underwriters on the other shall be deemed to be in the
same respective proportions as the total net proceeds from the offering of
the Stock received by the Company and the Selling Securityholders and the
total underwriting discount received by the Underwriters, as set forth in the
table on the cover page of the Prospectus, bear to the aggregate public
offering price of the Stock.  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 each indemnifying party and the parties'
relative intent, knowledge, access to information and opportunity to correct
or prevent such untrue statement or omission.

    The parties agree that it would not be just and equitable if
contributions pursuant to this paragraph (e) were to be 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 into
account the equitable considerations referred to in the first sentence of
this paragraph (e).  The amount paid by an indemnified party as a result of
the losses, claims, damages or liabilities, or actions in respect thereof,
referred to in the first sentence of this paragraph (e) shall be deemed to
include any legal or other expenses reasonably incurred by such indemnified
party in connection with investigation, preparing to defend or defending
against any action or claim which is the subject of this paragraph (e).
Notwithstanding the provisions of this paragraph (e), no Underwriter shall be
required to contribute any amount in excess of the underwriting discount
applicable to the Stock purchased by such Underwriter. No person guilty of
fraudulent misrepresentation (within the meaning of Section 11(f) of the
Securities Act) shall be entitled to contribution from any person who was not
guilty of such fraudulent misrepresentation.  The Underwriters' obligations in
this paragraph (e) to contribute are several in proportion to their
respective underwriting obligations and not joint.

    Each party entitled to contribution agrees that upon the service of a
summons or other initial legal process upon it in any action instituted
against it in respect of which contribution may be sought, it will promptly
give written notice of such service to the party or parties from whom
contribution may be sought, but the omission so to notify such party or
parties of any such service shall not relieve the party from whom
contribution may be sought from any obligation it may have hereunder or
otherwise (except as specifically provided in paragraph (d) of this
Section 7).

         (f)  Neither the Company nor the Selling Securityholders will,
without the prior written consent of each Underwriter, settle or compromise
or consent to the entry of any judgment in any pending or threatened claim,
action, suit or proceeding in respect of which indemnification may be sought
hereunder (whether or not such Underwriter or any person who controls such
Underwriter within the meaning of Section 15 of the Securities Act or Section
20 of the Exchange Act is a party to such claim, action, suit or proceeding)
unless such settlement, compromise or consent includes an unconditional
release of such Underwriter and each such controlling person from all
liability arising out of such claim, action, suit or proceeding.

                                      12




         (g)  The liability of each Selling Securityholder under such Selling
Securityholder's representations and warranties contained in paragraphs (b)
and (c) of Section 2 hereof and under the indemnity and reimbursement
agreements contained in the provisions of this Section 7 and Section 11
hereof shall be limited to an amount equal to the initial public offering
price of the stock sold by such Selling Securityholder to the Underwriters.
In addition, no Selling Securityholder shall be liable under the indemnity
and reimbursement agreements of Sections 7 and 11 hereof unless and until the
Underwriters have made written demand on the Company for payment under such
Sections which shall not have been paid or agreed to be paid by the Company
within 45 days after receipt by the Company of such demand.  A copy of such
demand when made to the Company shall be provided to the Selling
Securityholders.  The Company and the Selling Securityholders may agree, as
among themselves and without limiting the rights of the Underwriters under
this Agreement, as to the respective amounts of such liability for which they
each shall be responsible.

    8.   TERMINATION.  This Agreement may be terminated by you at any time
prior to the Closing Date by giving written notice to the Company and the
Selling Securityholders if after the date of this Agreement trading in the
Common Stock shall have been suspended, or if there shall have occurred (i)
the engagement in hostilities or an escalation of major hostilities by the
United States or the declaration of war or a national emergency by the United
States on or after the date hereof, (ii) any outbreak of hostilities or other
national or international calamity or crisis or change in economic or
political conditions if the effect of such outbreak, calamity, crisis or
change in economic or political conditions in the financial markets of the
United States would, in the Underwriters' reasonable judgment, make the
offering or delivery of the Stock impracticable, (iii) suspension of trading
in securities generally or a material adverse decline in value of securities
generally on the New York Stock Exchange, the American Stock Exchange, The
Nasdaq Stock Market, or limitations on prices (other than limitations on
hours or numbers of days of trading) for securities on either such exchange
or system, (iv) the enactment, publication, decree or other promulgation of
any federal or state statute, regulation, rule or order of, or commencement
of any proceeding or investigation by, any court, legislative body, agency or
other governmental authority which in the Underwriters' reasonable opinion
materially and adversely affects or will materially or adversely affect the
business or operations of the Company, (v) declaration of a banking
moratorium by either federal or New York State authorities or (vi) the taking
of any action by any federal, state or local government or agency in respect
of its monetary or fiscal affairs which in the Underwriters' reasonable
opinion has a material adverse effect on the securities markets in the United
States.  If this Agreement shall be terminated pursuant to this Section 8,
there shall be no liability of the Company or the Selling Securityholders to
the Underwriters and no liability of the Underwriters to the Company or the
Selling Securityholders; PROVIDED, HOWEVER, that in the event of any such
termination the Company and the Selling Securityholders agree to indemnify
and hold harmless the Underwriters from all costs or expenses incident to the
performance of the obligations of the Company and the Selling Securityholders
under this Agreement, including all costs and expenses referred to in
paragraphs (i) and (j) of Section 6 hereof.

    9.   CONDITIONS OF UNDERWRITERS' OBLIGATIONS.  The obligations of the
several Underwriters to purchase and pay for the Stock shall be subject to
the performance by the Company and by the Selling Securityholders of all
their respective obligations to be performed hereunder at or prior to the
Closing Date or any later date on which Option Stock is to be purchased, as
the case may be, and to the following further conditions:

         (a)  The Registration Statement shall have become effective; and no
stop order suspending the effectiveness thereof shall have been issued and no
proceedings therefor shall be pending or threatened by the Commission.

         (b)  The legality and sufficiency of the sale of the Stock hereunder
and the validity and form of the certificates representing the Stock, all
corporate proceedings and other legal matters incident to the foregoing, and
the form of the Registration Statement and of the Prospectus (except as to
the financial statements contained therein), shall have been approved at or
prior to the Closing Date by Gunderson Dettmer Stough Villeneuve Franklin &
Hachigian, LLP, counsel for the Underwriters.

         (c)  You shall have received from Cooley Godward LLP, counsel for
the Company and the Affiliated Selling Securityholders, an opinion, addressed
to the Underwriters and dated the Closing Date, covering the matters set
forth in Annex A hereto, and if Option Stock is purchased at any date after
the Closing Date, an additional opinion from such counsel, addressed to the
Underwriters and dated such later date, confirming that the statements
expressed as of the Closing Date in such opinion remain valid as of such
later date.

                                      13




         (d)  You shall have received from Garvey, Schubert & Barer, counsel
for Michael D. Almquist, an opinion, addressed to the Underwriters and dated
the Closing Date, covering the matters set forth in Annex B hereto.

         (e)  You shall have received from _________, counsel for Brittania
Holdings Limited, an opinion, addressed to the Underwriters and dated
[_________] covering the matters set forth in Annex C hereto.

         (f)  You shall be satisfied that (i) as of the Effective Date, the
statements made in the Registration Statement and the Prospectus were true
and correct and neither the Registration Statement nor the Prospectus omitted
to state any material fact required to be stated therein or necessary in
order to make the statements therein, respectively, not misleading, (ii)
since the Effective Date, no event has occurred which should have been set
forth in a supplement or amendment to the Prospectus which has not been set
forth in such a supplement or amendment, (iii) since the respective dates as
of which information is given in the Registration Statement in the form in
which it originally became effective and the Prospectus contained therein,
there has not been any material adverse change or any development involving a
prospective material adverse change in or affecting the business, properties,
financial condition or results of operations of the Company, whether or not
arising from transactions in the ordinary course of business, and, since such
dates, except in the ordinary course of business, Company has not entered
into any material transaction not referred to in the Registration Statement
in the form in which it originally became effective and the Prospectus
contained therein, (iv) the Company does not have any material contingent
obligations which are not disclosed in the Registration Statement and the
Prospectus, (v) there are not any pending or known threatened legal
proceedings to which the Company is a party or of which property of the
Company is the subject which are material and which are not disclosed in the
Registration Statement and the Prospectus, (vi) there are not any franchises,
contracts, leases or other documents which are required to be filed as
exhibits to the Registration Statement which have not been filed as required,
(vii) the representations and warranties of the Company herein are true and
correct in all material respects as of the Closing Date or any later date on
which Option Stock is to be purchased, as the case may be, and (viii) there
has not been any material change in the market for securities in general or
in political, financial or economic conditions from those reasonably
foreseeable as to render it impracticable in your reasonable judgment to make
a public offering of the Stock, or a material adverse change in market levels
for securities in general (or those of companies in particular) or financial
or economic conditions which render it inadvisable to proceed.

         (g)  You shall have received on the Closing Date and on any later
date on which Option Stock is purchased a certificate, dated the Closing Date
or such later date, as the case may be, and signed by the President and the
Chief Financial Officer of the Company, stating that the respective signers
of said certificate have carefully examined the Registration Statement in the
form in which it originally became effective and the Prospectus contained
therein and any supplements or amendments thereto, and that the statements
included in clauses (i) through (vii) of paragraph (f) of this Section 9 are
true and correct.

         (h)  You shall have received from PricewaterhouseCoopers LLP, a
letter or letters, addressed to the Underwriters and dated the Closing Date
and any later date on which Option Stock is purchased, confirming that they
are independent public accountants with respect to the Company within the
meaning of the Securities Act and the applicable published rules and
regulations thereunder and based upon the procedures described in their
letter delivered to you concurrently with the execution of this Agreement
(herein called the Original Letter), but carried out to a date not more than
three business days prior to the Closing Date or such later date on which
Option Stock is purchased (i) confirming, to the extent true, that the
statements and conclusions set forth in the Original Letter are accurate as
of the Closing Date or such later date, as the case may be, and (ii) setting
forth any revisions and additions to the statements and conclusions set forth
in the Original Letter which are necessary to reflect any changes in the
facts described in the Original Letter since the date of the Original Letter
or to reflect the availability of more recent financial statements, data or
information.  The letters shall not disclose any change, or any development
involving a prospective change, in or affecting the business or properties of
the Company which, in your sole judgment, makes it impractical or inadvisable
to proceed with the public offering of the Stock or the purchase of the
Option Stock as contemplated by the Prospectus.

         (i)  You shall have received from PricewaterhouseCoopers LLP a
letter stating that their review of the Company's system of internal
accounting controls, to the extent they deemed necessary in establishing

                                      14




the scope of their examination of the Companys financial statements as at
March 31, 1999, did not disclose any weakness in internal controls that they
considered to be material weaknesses.

         (j)  You shall have been furnished evidence in usual written or
telegraphic form from the appropriate authorities of the several
jurisdictions, or other evidence satisfactory to you, of the qualification
referred to in paragraph (f) of Section 6 hereof.

         (k)  Prior to the Closing Date, the Stock to be issued and sold by
the Company shall have been duly authorized for listing by the NNM upon
official notice of issuance.

         (l)  On or prior to the Closing Date, you shall have received from
all directors and officers of the Company, and shareholders, comprising at
least 98% of the outstanding shares of capital stock in the aggregate,
agreements, in form reasonably satisfactory to Hambrecht & Quist LLC, stating
that without the prior written consent of Hambrecht & Quist LLC on behalf of
the Underwriters, such person or entity will not, for a period of 180 days
following the effective date of the Registration Statement, directly or
indirectly, sell, offer, contract to sell, transfer the economic risk of
ownership in, make any short sale, pledge, or otherwise dispose of any shares
of Common Stock or any securities convertible into or exchangeable or
exercisable for or any other rights to purchase or acquire Common Stock.

    All the agreements, opinions, certificates and letters mentioned above or
elsewhere in this Agreement shall be deemed to be in compliance with the
provisions hereof only if Gunderson Dettmer Stough Villeneuve Franklin &
Hachigian, LLP, counsel for the Underwriters, shall be reasonably satisfied
that they comply in form and scope.

    In case any of the conditions specified in this Section 9 shall not be
fulfilled, this Agreement may be terminated by you by giving notice to the
Company.  Any such termination shall be without liability of the Company or
Selling Securityholders to the Underwriters and without liability of the
Underwriters to the Company or the Selling Securityholders; PROVIDED,
HOWEVER, that (i) in the event of such termination, the Company and the
Selling Securityholders agree to indemnify and hold harmless the Underwriters
from all costs or expenses incident to the performance of the obligations of
the Company and the Selling Securityholders under this Agreement, including
all costs and expenses referred to in paragraphs (i) and (j) of Section 6
hereof, and (ii) if this Agreement is terminated by you because of any
refusal, inability or failure on the part of the Company or the Selling
Securityholders to perform any agreement herein, to fulfill any of the
conditions herein, or to comply with any provision hereof other than by
reason of a default by any of the Underwriters, the Company will reimburse
the Underwriters severally upon demand for all out-of-pocket expenses
(including reasonable fees and disbursements of counsel) that shall have been
incurred by them in connection with the transactions contemplated hereby.

     10. CONDITIONS OF THE OBLIGATION OF THE COMPANY AND THE SELLING
SECURITYHOLDERS. The obligation of the Company and the Selling
Securityholders to deliver the Stock shall be subject to the conditions that
(a) the Registration Statement shall have become effective and (b) no stop
order suspending the effectiveness thereof shall be in effect and no
proceedings therefor shall be pending or threatened by the Commission.

     In case either of the conditions specified in this Section 10 shall not
be fulfilled, this Agreement may be terminated by the Company and the Selling
Securityholders by giving notice to you.  Any such termination shall be
without liability of the Company and the Selling Securityholders to the
Underwriters and without liability of the Underwriters to the Company or the
Selling Securityholders; PROVIDED, HOWEVER, that in the event of any such
termination the Company and the Selling Securityholders jointly and severally
agree to indemnify and hold harmless the Underwriters from all costs or
expenses incident to the performance of the obligations of the Company and the
Selling Securityholders under this Agreement, including all costs and expenses
referred to in paragraphs (i) and (j) of Section 6 hereof.

         11. REIMBURSEMENT OF CERTAIN EXPENSES.  In addition to its other
obligations under Section 7 of this Agreement, the Company hereby agrees to
reimburse on a quarterly basis the Underwriters for all reasonable legal and
other expenses incurred in connection with investigating or defending any
claim, action, investigation, inquiry or other proceeding arising out of or
based upon any statement or omission, or any alleged statement or omission,
described in paragraph (a) of Section 7 of this Agreement, notwithstanding
the absence of a judicial determination as to the propriety and
enforceability of the obligations under this Section 11 and the possibility
that such payments

                                      15




might later be held to be improper; PROVIDED, HOWEVER, that (i) to the extent
any such payment is ultimately held to be improper, the persons receiving
such payments shall promptly refund them and (ii) such persons shall provide
to the Company, upon request, reasonable assurances of their ability to
effect any refund, when and if due.

    12. PERSONS ENTITLED TO BENEFIT OF AGREEMENT. This Agreement shall inure
to the benefit of the Company, the Selling Securityholders and the several
Underwriters and, with respect to the provisions of Section 7 hereof, the
several parties (in addition to the Company, the Selling Securityholders and
the several Underwriters) indemnified under the provisions of said Section 7,
and their respective personal representatives, successors and assigns.
Nothing in this Agreement is intended or shall be construed to give to any
other person, firm or corporation any legal or equitable remedy or claim
under or in respect of this Agreement or any provision herein contained.  The
term successors and assigns as herein used shall not include any purchaser,
as such purchaser, of any of the Stock from any of the several Underwriters.

    13.  NOTICES.  Except as otherwise provided herein, all communications
hereunder shall be in writing or by telegraph and, if to the Underwriters,
shall be mailed, telegraphed or delivered to Hambrecht & Quist LLC, One Bush
Street, San Francisco, California 94104; and if to the Company, shall be
mailed, telegraphed or delivered to it at its office, 200 First Avenue West,
Suite 500, Seattle, Washington 98119, Attention: Chief Financial Officer; and
if to the Selling Securityholders, shall be mailed, telegraphed or delivered
to the Selling Securityholders in care of F5 Networks, Inc., 200 First Avenue
West, Suite 500, Seattle, WA, 98119, Attention: Chief Financial Officer.
All notices given by telegraph shall be promptly confirmed by letter.

    14. MISCELLANEOUS.  The reimbursement, indemnification and contribution
agreements contained in this Agreement and the representations, warranties
and covenants in this Agreement shall remain in full force and effect
regardless of (a) any termination of this Agreement, (b) any investigation
made by or on behalf of any Underwriter or controlling person thereof, or by
or on behalf of the Company or the Selling Securityholders or their
respective directors or officers, and (c) delivery and payment for the Stock
under this Agreement; PROVIDED, HOWEVER, that if this Agreement is terminated
prior to the Closing Date, the provision of paragraph (k) of Section 6 hereof
shall be of no further force or effect.

    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.

    This Agreement shall be governed by, and construed in accordance with,
the laws of the State of California.

                                      16




Please sign and return to the Company and to the Selling Securityholders in
care of the Company the enclosed duplicates of this letter, whereupon this
letter will become a binding agreement among the Company, the Selling
Securityholders and the several Underwriters in accordance with its terms.


                                       Very truly yours,

                                       F5 NETWORKS, INC.



                                       By
                                         --------------------------------------
                                          Jeffrey S. Hussey
                                          President and Chief Executive Officer



                                       Michael D. Almquist

                                       By:
                                         --------------------------------------
                                          Jeffrey S. Hussey
                                          Attorney-in-Fact


                                       ----------------------------------------
                                       Jeffrey S. Hussey



                                       Britannia Holdings Limited

                                       By:
                                         --------------------------------------
                                          Jeffrey S. Hussey
                                          Attorney-in-Fact


The foregoing Agreement is hereby confirmed
and accepted as of the date first above written.

HAMBRECHT & QUIST LLC
BANCBOSTON ROBERTSON STEPHENS INC
DAIN RAUSCHER WESSELS, a division of Dain Rauscher Incorporated



By
   ------------------------------------------------
   Managing Director
   Acting on behalf of the several Underwriters,
   including themselves, named in Schedule I hereto