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                                                                   EXHIBIT 10.16

                                      IXIA
                                 2000 BONUS PLAN

The Company believes that a portion of each employee's annual compensation
should be directly related to the Company's financial performance. Accordingly,
the fiscal 2000 Bonus Plan is designed to motivate and reward employees for
achieving certain key financial results. The Company believes that the
achievement of these goals and objectives is essential for the Company's success
and for the continued growth of shareholder value.

FINANCIAL MEASURE

Net revenues, as determined in accordance with GAAP, will be the sole financial
measure for determining the level of bonus to be paid to employees. Performance
will be measured relative to the Company's net revenues for fiscal 2000. No
bonus will be payable if the Company's net revenues for fiscal 2000 are less
than $45,700,000.

Eligibility

All employees of Ixia and its subsidiaries are eligible to participate with the
following exclusions:

        1.     Commissioned employees
        2.     Employees hired in December 2000

Employees must be employed by Ixia or one of its subsidiaries on the date of
payment to be eligible to receive a bonus payment.

PARTICIPATION LEVELS

The bonus is to be calculated as a percentage of an employee's actual earnings
during fiscal 2000, excluding certain payments (e.g., reimbursement of moving
expenses, car allowances, bonus payments, sign-on bonuses, gains from stock
option exercises and similar payments). The applicable percentage will be
determined based on the net revenues achieved by the Company for fiscal 2000.
For purposes of determining an employee's bonus, the percentages to be applied
to actual earnings are as follows for the net revenue levels listed below:

<TABLE>
<CAPTION>
-------------------------------------------------------------------------------------------------
  2000 NET REVENUES     PRESIDENT AND     CFO AND OTHER
         ($)             VP WW SALES           VPS              DIRECTORS         ALL OTHERS
-------------------------------------------------------------------------------------------------
<S>                     <C>               <C>                   <C>               <C>
    $45,700,000               75%               40%                15%                10%
-------------------------------------------------------------------------------------------------
     47,985,000               80%               43%                17%                11%
-------------------------------------------------------------------------------------------------
     50,270,000               85%               46%                19%                12%
-------------------------------------------------------------------------------------------------
     52,555,000               90%               49%                21%                13%
-------------------------------------------------------------------------------------------------
     54,840,000               95%               52%                23%                14%
-------------------------------------------------------------------------------------------------
     57,125,000              100%               55%                25%                15%
-------------------------------------------------------------------------------------------------
     59,410,000              105%               58%                26%                15%
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     61,695,000              110%               61%                27%                15%
-------------------------------------------------------------------------------------------------
     63,980,000              115%               64%                28%                15%
-------------------------------------------------------------------------------------------------
     66,265,000              120%               67%                29%                15%
-------------------------------------------------------------------------------------------------
     68,550,000              125%               70%                30%                15%
-------------------------------------------------------------------------------------------------
     70,835,000              130%               73%                30%                15%
-------------------------------------------------------------------------------------------------
     73,120,000              135%               76%                30%                15%
-------------------------------------------------------------------------------------------------
     75,405,000              140%               79%                30%                15%
-------------------------------------------------------------------------------------------------
     77,690,000              145%               82%                30%                15%
-------------------------------------------------------------------------------------------------
     79,975,000              150%               85%                30%                15%
-------------------------------------------------------------------------------------------------
</TABLE>

This Plan was duly adopted and approved by the Board of Directors of the Company
on September 1, 2000.

/S/ RONALD W. BUCKLY
------------------------------------
Ronald W. Buckly, SecretaryExhibit 10.1
                                 PROMISSORY NOTE

                                                                Denver, Colorado

$8,000.00                                                       November 1, 1999

     FOR VALUE RECEIVED, the undersigned, Posteralley.com, Inc., (hereinafter
referred to as the "Maker"), agrees and promises to pay to the order of Scott M.
Thornock (hereinafter referred to as the "Holder"), at 1422 Delgany Street,
Suite #12, Denver, Colorado 80202, or such other place as the Holder may
designate in writing, in coin or currency of the United States of America, which
at the time of payment is legal tender for the payment of public and private
debts, the principal sum of eight thousand dollars ($8,000.00), together with
interest thereon at the rate of eight per cent (8%) per annum, from the date
hereof until maturity, as hereinafter provided.

     This promissory note (hereinafter referred to as the "Note") is due and
payable as follows:

     On November 1, 2000, the sum of $8,000.00, plus interest at the rate
     of 8% per annum ($640.00), for a total sum of $8,640.00.

     Any installment or other payment made by the Maker shall be applied first
to the payment of accrued interest due on the unpaid principal balance and the
remainder of any installment or other payment made by the Maker shall be applied
to the reduction of unpaid principal. This Note may be prepaid in whole or in
part at any time without penalty.

     If default is made in the payment of this Note, as and when the same is or
becomes due, the owner and holder of this Note may, after notice and failure to
cure as hereinafter provided, without additional notice or demand, declare the
entire unpaid principal balance hereof and accrued interest at once due and
payable.

     Except as otherwise specifically set out herein, the Maker waives demand
and presentment for payment, notice of non-payment, protest, notice of protest,
notice of acceleration of the indebtedness due hereunder, bringing of suit and
diligence in taking any action to collect amounts called for hereunder, and
agrees that the time of payments hereof may be extended without notice at any
time and from time-to-time, and for periods of time for a term or terms in
excess of the original term without notice or consideration to, or consent from,
the Maker, without same constituting a waiver of the Holder's rights under this
Note.

     If any payment hereunder is not made when due or in the event of default in
any other covenant, condition or promise under this Note, the principal shall,
at the option of the Holder and without further notice, immediately become due
and payable in full. From and after the date of such default, the principal sum
and all interest, then accrued shall bear interest at the rate of eighteen
percent (18%) per annum until paid.

     If the entire outstanding principal balance becomes due, the Maker agrees
to pay the Holder's reasonable costs (including reasonable attorney's fees and
court costs) in collecting on this Note, including the reasonable costs of
obtaining and enforcing a judgment for any balance due on this Note.

     This Note has been executed in the City identified in the heading and
delivered to the Holder at the address stated herein. It is to be performed, in
whole or in part, in the State of Colorado, and the laws of such state shall

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govern the validity, construction, enforcement and interpretation of this Note.
Jurisdiction and venue for any action hereunder shall be in the County of the
City identified in the heading.

     The Maker represents that it is duly authorized and empowered to enter
into, deliver, perform and be fully bound by all of the terms, provisions and
conditions of this Note. The Maker also represents that the making and delivery
of this Note, and the performance of any agreement or instrument made in
connection herewith, does not conflict with or violate any other agreement to
which the Maker is a party.

     The Holder may transfer this Note to any person, firm or corporation which
shall thereupon become vested with all of the rights and powers herein given to
the Holder and the Holder shall thereafter be forever relieved and discharged
from any liability to the Maker with respect to any matters arising subsequent
to the date of such transfer.

     In the event that any word, phrase, clause, sentence or other provision
hereof shall violate any applicable statute, ordinance or rule of law in any
jurisdiction in which it is used, such provision shall be ineffective to the
extent of such violation without invalidating any other provision hereof.

     IN WITNESS HEREOF, this Note is executed on the date and year above
written.

                                       POSTERALLEY.COM, INC.

                                       By:  /s/  Bruce A. Capra
                                         ---------------------------------------
                                                 Bruce A. Capra,
                                                 Secretary

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