Document:

<PAGE>

                                                                 Exhibit 10.18

CISCO SYSTEMS
    [LOGO]
   CAPITAL

March 17, 2000

Warren Talbot
Cmerun Inc.
1740 Massachusetts Ave.
Boxboro, MA 01719

Cisco Systems Capital Corporation ("CSC"), a wholly owned subsidiary of Cisco
Systems. Inc. ("Cisco Systems"), specializes in providing innovative finance
solutions for Cisco Systems products and services. We are pleased to present
this proposal ("Proposal") for the transaction described below:

LESSOR:                       Cisco Systems Capital Corporation

LESSEE:                       Cmerun Inc.

EQUIPMENT:                    Cisco Systems products, or other products
                              satisfactory to CSC, as presented in a quotation
                              from the Cisco Systems Sales Team or a Cisco Value
                              Added Reseller, in form satisfactory to CSC.

SOFT COSTS:                   "Soft Costs," such as freight, taxes, maintenance,
                              installation, and software may be included in or
                              financed by the lease, as approved by the Lessor
                              in its discretion.

PROPOSAL CREDIT               In the aggregate, up to $400,000.00, including
LINE:                         Soft Costs not to exceed 33% of the total of this
                              proposal credit line.

PROPOSAL CREDIT               All purchase orders for equipment under this
LINE UTILIZATION              Proposal Credit Line shall be submitted no later
PERIOD:                       than six months after the MLA is agreed upon by
                              both the Lessee and CSC or six months after this
                              Proposal is agreed upon by both the Lessee and
                              CSC, which ever date occurs later.

SHIP TO:                      Location within the U.S. as advised. The equipment
                              may not be shipped to or used in any jurisdiction
                              outside the U.S.

PARTIAL SHIPMENTS:            Please indicate at the bottom of this letter
                              whether Lessee will accept scheduling of partial
                              purchase order shipments. (If not,
<PAGE>

                              please note that Cisco Systems will retain
                              shipments until complete.)

LEASE TYPE:                   Leases with a term equal to or less than 47 months
                              are intended to be a true lease for tax and
                              commercial law purposes. Leases with a term equal
                              to or greater than 48 months are intended to be a
                              lease intended as security for tax and commercial
                              law purposes.

INTERIM RENT:                 There is no interim rent, and commencement of
                              rental payments will occur on the 1st of the month
                              on or after acceptance or deemed acceptance.

NET LEASE:                    This is a net lease transaction under which all
                              costs and liabilities, including without
                              limitation, for insurance, maintenance and taxes,
                              are paid by Lessee for the term of the lease.
                              Transferable manufacturer's guarantees or
                              warranties will be passed on to Lessee, assuming
                              due performance of Lessee obligations.

ADJUSTMENT OF                 The rental amount quoted in this Proposal will be
RENTAL FACTOR:                adjusted prior to the date of preparation of any
                              Equipment Lease Schedule to reflect changes equal
                              to or greater than one quarter of one percent
                              (.25%) in the weekly average of the Three Year
                              Treasury Note interest rate, as specified in
                              Federal Reserve statistical release H.15 from the
                              five banking days preceding the date of this
                              Proposal to the five banking days preceding the
                              invoice date of the final shipment on the
                              Schedule. Changes to the benchmark rate of less
                              than one quarter of one percent (.25%) will not
                              affect the Lease Rate Factor quoted herein. The
                              Three Year Treasury Note H.15 statistic is updated
                              daily by the U.S. Federal Reserve for the
                              preceding day's yield. The statistic is publicly
                              available on the Internet at
                              http://www.bog.frb.fed.us/releases/h15/.

EQUIPMENT                     Purchase orders for equipment shall be placed by
PROCUREMENT:                  Lessee with Cisco Systems, Inc., or a Cisco Value
                              Added Reseller, with all rights assigned to Lessor
                              upon Lessor's election to fund. All such purchase
                              orders shall he subject to the standard Terms and
                              Conditions of Sale of Cisco Systems, Inc. or such
                              Cisco Value Added Reseller, including the "net 30"
                              payment terms commencing from date of shipment. No
                              funding shall occur prior to execution by the
                              parties of CSC's standard Master Agreement to
                              Lease Equipment ("Master Lease Agreement"). If,
                              for any reason, Lessor does not fund any equipment
                              or lease, or any contemplated lease is otherwise
                              not consummated, Lessee shall be solely
                              responsible for payment in full of the purchase
                              price (together with ancillary costs and expenses)
                              associated with any outstanding orders.
<PAGE>

ECONOMIC                      All purchase orders that are related to the
UTILIZATION DATE:             approved pricing scenarios on this document must
                              be received within 90 days.

PRICING SCENARIO              In accordance with the pricing and configuration
#20067                        in this pricing scenario, the monthly rental
                              payment made in Advance for each Rental Period
Pricing Scenario Accepted:    ("Rent") will be payable on the 1st day of payment
                              period. The Rental Period (Rent") on the lease
------                        would be the total Equipment Cost multiplied by
                              the Lease Rate Factor. Assuming that Soft Costs
Pricing Scenario Declined:    make up less than 10% of the total Equipment Cost.
                              Soft Costs will be included in the Equipment Lease
------                        Rate Factor. If Soft Costs are greater than 10%,
                              CSC will recalculate the rental to reflect the
                              stated Soft Costs Factors.

                              Cisco Equipment: Lease Rate Factor of 2.8900% for
                              36 months

                              Cisco Main/Services: Lease Rate Factor of
                              2.778000% for 36 months

                              Cisco Software: Lease Rate Factor of 3.3900% for
                              36 months

                              Notwithstanding the foregoing, CSC is not
                              responsible for maintenance, software or ancillary
                              services relating to the equipment, nor for
                              ensuring that any necessary maintenance or
                              services agreements or software licenses with
                              Cisco Systems or any other third party are in
                              effect at any time.

Rental Factor:                The rental amount expressed, as a percentage of
                              the total equipment cost (including all costs
                              defined in the pricing scenario) is 2.8900% per
                              the payment frequency defined in the pricing
                              scenarios accepted both the lessee and CSC.

End of Lease Options:         At the end of the Original Term of the Lease,
                              Lessee may select one of the following options:
                              (1) purchase the equipment for the then Fair
                              Market Value (to be defined in the Lease
                              documentation) or (2) subject to the consent of
                              Lessor, renew the lease of the equipment on a
                              month-to-month basis for the daily equivalent of
                              the original Rent, payable monthly in advance, or
                              (3) return the Equipment to the Lessor.

CREDIT APPROVAL:              This Proposal includes only a brief description of
                              the substantive terms and conditions of the
                              contemplated lease transactions and is not
                              intended as a formal commitment of credit by CSC
                              or Cisco Systems. Any funding by CSC for the
                              purchase of equipment is subject to the credit
                              approval of CSC (including the absence of any
                              material adverse change, in the judgment of CSC,
                              in the business or financial condition or
                              prospects of Lessee) and to satisfactory
                              documentation including as described below. You
                              agree to provide two years' audited financial
                              statements, bank

<PAGE>

                              references, a completed credit application and any
                              other required credit information along with the
                              signed copy of this Proposal. You hereby authorize
                              CSC and/or its agents to make a complete credit
                              investigation and to relate this information to
                              others as necessary to secure credit approval.

The parties acknowledge that the financing contemplated by this Proposal is
subject to the above-referenced conditions and the execution and delivery of all
appropriate documents (in form and substance satisfactory to CSC), including
without limitation, to the extent applicable, the Master Lease Agreement, any
Schedule, certificate of acceptance, lease assignment of purchase order, UCC
financing statements, legal opinion and other documents and agreements
reasonably required by CSC. You agree to execute and return to CSC, within 10
days of receipt, the Master Lease Agreement.

This Proposal, if not acknowledged and agreed to by the lessee, will expire 30
days from the date of this document. This Proposal is confidential and may not
be disclosed to any person or entity without our consent.

Thank you for the opportunity to present this Proposal. We look forward to doing
business with you. If you have any questions, please do not hesitate to contact
me.

Sincerely.

CISCO SYSTEMS CAPITAL CORPORATION         ACKNOWLEDGED AND AGREED:

                                          Cmerun Inc.
By: /s/ Susan Wood
    ------------------
    Susan Wood                            By: /s/ Gerald J. McGovern
                                              ----------------------------------
                                              (Authorized  Signature)

                                          Name: Gerald J. McGovern
                                                --------------------------------

                                          Title: CFO
                                                 -------------------------------

                                          Dated: 3/21/00
                                                 -------------------------------

                                          Lessee is willing to accept scheduling
                                          of partial purchase order shipments
                                          [Note. Failure to circle either
                                          option, shall be deemed an instruction
                                          not to schedule partial purchase order
                                          shipments.]<PAGE>

                                                                 Exhibit 10.19

                              SCHEDULE NO. 001-000

Master Agreement No. 2760

THIS SCHEDULE NO. 001-000 (this "Schedule") dated as of July 6, 2000, by and
between CISCO SYSTEMS CAPITAL CORPORATION ("Lessor"), having its principal place
of business at 170 West Tasman Drive, San Jose, California 95134, fax number
408-527-1632, and C Me Run Corp. ("Lessee") having its principal place of
business at 1740 Massachusetts Avenue, , Boxboro, MA 01719, supplements that
certain Master Agreement to Lease Equipment No. 2760 dated as of March 21, 2000
(the "Agreement," and together with this Schedule, the "Lease") between Lessor
and Lessee, incorporated herein by this reference. Capitalized terms not
otherwise defined herein have the meanings specified in the Agreement.

1. EQUIPMENT DESCRIPTION. Quantity, manufacturer, and model of the Equipment
subject to this Schedule are as specified at Annex A hereto, and the serial
number is as specified at Annex A or in the applicable Certificate of
Acceptance. Unless otherwise specified at Annex A, the Equipment is new.

2. EQUIPMENT LOCATION. The Equipment shall at all times be installed or located
at the location specified in Annex A or in the applicable Certificate of
Acceptance, or such other location as is permitted under the Agreement.

3. EQUIPMENT COST. The "Equipment Cost" for any item of Equipment is the sum of
(a) the equipment purchase price specified in the invoice now or hereafter
issued by the Vendor in relation to the Equipment, plus (b) all taxes, shipping,
insurance, installation, cabling, maintenance, software and related expenses to
the extent paid or financed by Lessor in its discretion (collectively, "Soft
Costs") and as may be reflected in Annex A hereto. The aggregate Equipment Cost
for all Equipment under this Schedule is $386,150.00.

4. RENTAL PAYMENT AMOUNT. Based on the aggregate Equipment Cost above and the
lease payment factor(s) set forth below, the monthly rental payment in respect
of the Equipment is $11,159.74 ("Rent"):

            Equipment Rental Factor:                  0.0289

5. LEASE TERM. The "Lease Term" of this Lease shall begin on the Commencement
Date and shall consist of an "Original Term" equal to thirty-six (36) months
and, if this is an FMV Lease (as defined in Paragraph 8), the Original Term
shall automatically be extended on a month-to-month basis (each, an "Extended
Term") unless either party notifies the other not later than 30 days prior to
the end of the Lease Term or any extension thereof of its election not to extend
such lease term or extended term. If this is not an FMV Lease, the Lease Term
shall end at the end of the Original Term. The "Commencement Date" of this Lease
shall be the earlier to occur of (a) the execution date specified in the
certificate of acceptance, if any, delivered by Lessee ("Certificate of
Acceptance") relating to the Equipment, or if the Equipment is delivered in
multiple shipments, relating to the last item of Equipment delivered to Lessee,
or (b) 08/01/2000. Notwithstanding any provision to the contrary contained in
any Lease Document, Lessee shall be deemed to have irrevocably accepted, for
purposes of the Lease, the Equipment on the Commencement Date. Lessee agrees to
complete, sign and return to Lessor any Certificate of Acceptance

                                       2.
<PAGE>

sent to Lessee, within five days of Lessee's receipt and acceptance, or deemed
acceptance, of the relevant Equipment, and, if Lessee fails to do so, Lessee
shall (i) be deemed to have accepted and ratified such Certificate of Acceptance
and (ii) be deemed to have authorized Lessor as attorney-in-fact, coupled with
an interest, to complete and sign the Certificate of Acceptance on behalf and in
the name of Lessee.

6. RENT PAYMENTS. Rent for the Original Term shall be payable in thirty-six (36)
consecutive, equal monthly payments in advance, on the first day of each such
period, commencing with the first day of the calendar month immediately
following the Commencement Date (unless the Commencement Date is the first day
of the month and rent is payable in advance, in which case the first Rent
payment shall be due on such date). Lessor agrees that no Rent shall be payable
for any period prior to the Commencement Date or for the period from the
Commencement Date (provided such date is not the first day of the month) until,
but not including, the first day of the calendar month immediately following the
Commencement Date. Unless otherwise agreed in writing by the Lessor at such
time, the Rent for any Extended Term shall be payable monthly, in advance, and
shall be in a daily-equivalent amount equal to that of the original Rent,
adjusted, as applicable, for Soft Costs.

7. END OF TERM PURCHASE OPTION PRICE. Lessee may or shall, as the case may be,
purchase the Equipment in accordance with the terms of Paragraph 8 for the
following amount (as checked and completed by Lessor):

      |_| (a)     $_______

       X  (b)     Fair Market Value (as defined in Paragraph 8)

8. END OF TERM PURCHASE OPTION.

      (a) If option (b) is selected at Paragraph 7, this Lease shall be deemed
      an "FMV Lease" and Lessee shall have an end of term purchase option as
      follows. (If no option is selected at Paragraph 7, option (b) shall be
      deemed to apply.) Provided this Lease has not been terminated earlier and
      there exists no Event of Default or event which with notice, lapse of time
      or both, would be an Event of Default, not earlier than 90 days and not
      later than 30 days before the end of the Original Term, Lessee may deliver
      to Lessor an irrevocable notice electing to purchase some, but not
      necessarily all of the Equipment at the end of the Original Term for an
      amount equal to the amount specified in the provision selected (or deemed
      selected) in Paragraph 7, which amount Lessee shall pay to Lessor on the
      last day of the Original Term. Such notice shall set forth a description
      of the Equipment to be purchased and the Equipment to be returned. If no
      such notice is delivered by Lessee to Lessor within such period, Lessee
      shall be deemed to have waived any right to purchase such Equipment.

      (b) If option (a) of Paragraph 7 is selected, Lessee shall pay Lessor the
      amount specified in such option on the last day of the Original Term.

      (c) Upon full payment to it of the amount specified in clause (a) or (b)
      of this Paragraph 8, Lessor shall transfer its right, title and interest
      in and to such Equipment to Lessee without recourse or warranty, except
      that Lessor shall warrant that such Equipment is free and clear of any
      lien or encumbrance arising by or through Lessor.

      (d) "Fair Market Value" shall mean the value which would obtain in an
      arm's-length transaction between an informed and willing buyer-user (other
      than a lessee currently in possession or a used equipment dealer) under no
      compulsion to buy, and an informed and willing seller under no

                                       3.
<PAGE>

      compulsion to sell and, in such determination, costs of removal from the
      location of current use shall not be a deduction from such value. Fair
      Market Value shall be determined by the mutual agreement of Lessor and
      Lessee in accordance with the preceding sentence or, if Lessee and Lessor
      cannot agree within 20 days after Lessee's notice of election to purchase
      under clause (a) of this Paragraph 8, by a qualified independent equipment
      appraiser selected by Lessor, at Lessee's cost.

9. CASUALTY VALUE. The Casualty Value of the Equipment shall at any time be the
greater of (a) Fair Market Value at such time; or (b) as of the date of shipment
from the manufacturer, 1.10% of Equipment Cost, such amount to decrease from
month to month thereafter by 1.69% of Equipment Cost.

IN WITNESS WHEREOF, Lessor and Lessee have caused this Schedule to be duly
executed by their authorized representatives as of the date first above written.
Each signatory of the Lessee represents that he or she is authorized to execute
and deliver this Schedule on behalf of Lessee.

CISCO SYSTEMS CAPITAL CORPORATION,        C Me Run Corp., Lessee
Lessor

By:                                       By: /s/ Gerald J. McGovern
    ------------------------------            ------------------------------

Title:                                    Title: Treasurer & CFO
       ---------------------------               ---------------------------

                                          By: /s/ David W. Myers
                                              ------------------------------

                                          Title: President
                                                 ---------------------------

                                       4.
<PAGE>

                                    ANNEX A
                                       TO
                                 SCHEDULE NO. 1
                                       TO
                           MASTER AGREEMENT NO. 2760

               EQUIPMENT INVOICES, DESCRIPTION, COST AND LOCATION

Lessor: Cisco Systems Capital Corporation
Lessee: C ME RUN CORP.

                        As set forth below:

<TABLE>
<CAPTION>

Cust P0#    P.O. Amount       Vendor       Invoice #   Invoice Date
-------------------------------------------------------------------
<S>         <C>           <C>                <C>        <C>
CSC-10319   $388,150.00   Dimension Data     33000      06/22/2000
                            is the VAR

<CAPTION>
                          Equipment               Shipping/     Invoice       Ship to City/State   Installed Location if
        Description        Subtotal    Taxes      Handling      Amount             Location              different
------------------------------------------------------------------------------------------------------------------------
<S>                       <C>              <C>           <C>    <C>               <C>           <C>
   Cisco Cataylist 6509   386,150.00       0.00          0.00   $386,150.00       Huston, MA
                          -------------------------------------------------                     ------------------------
           Totals         386,150.00       0.00          0.00    386,150.00          01719
===========================================================================

        LEASE PAYMENTS:
       Equipment Total:   386,150.00   X LRF  =    $11,159.74
 Monthly Lease Payment:    11,159.74
        Total Financed:  $386,150.00
 Total Monthly Payment:   $11,159.74

                  Term:    36 months
                  Type:          FMV
   Final Shipment Date:   06/22/2000
Deemed Acceptance Date:   07/06/2000
     Commencement Date:   08/01/2000
</TABLE>

                                     Page 1
<PAGE>

135 Newbury Street
Framingham, MA 01701
                                ------------------------------------
                                PG          INV NO          INV DATE
Sales & Admin  (508) 620-1800   ------------------------------------
Service & Rtns (508) 620-1120    1        INV00033000        6/22/00    [LOGO]
--------------------------------------------------------------------------------
                                                                      DIMENSION
                                                                      _____ DATA

SOLD  CISCO SYSTEMS CAPITAL CORP                    SHIP cMeRun
TO:   170 WEST TASMAN DRIVE                         TO:  ONE CABOT STREET
      MS SJC2/3                                          HUDSON, MA 01719
      SAN JOSE, CA 95134-1706
      ATTN: BARBARA KLENNER

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------
ORDER   ORDER   CUST.       SALES                        SHIP              SHIP          TERMS
 NO     DATE     NO         PERSON          P0#          VIA               DATE
---------------------------------------------------------------------------------------------------
                                          CSC-10319                                     NET 30 DAYS
---------------------------------------------------------------------------------------------------
 QTY ORDERED                                                            PRICE UNIT     UNIT PRICE
 -----------                ITEM NO.                     ITEM           ---------------------------
 QTY SHIPPED            QUANTITY BACK ORD.            DESCRIPTION       ITEM DISC    EXTENDED PRICE
---------------------------------------------------------------------------------------------------
<S>                     <C>                                                           <C>
     2.0000             CISCO CATAYLIST 6509 W/MSFC.PFC SUPERVISORY                    $83,823.00
     2.0000             MODULE, MEMORY, SOFTWARE & POWER SUPPLY                       $167,646.00
     2.0000             CISCO 21620 ROUTER W/ TI INTERFACE CARD                         $4,860.00
     2.0000                                                                             $9,720.00
     2.0000             CISCO PIX FIREWALL                                             $20,250.00
     2.0000                                                                            $40,500.00
     2.0000             LOCAL DIRECTOR 430 W/ FAIL OVER CABLE                          $18,850.00
     2.0000                                                                            $37,700.00
     2.0000             CISCO SECURE IDS FAST ETHERNET SENSER                          $14,250.00
     2.0000                                                                            $28,500.00
     1.0000             CISCO SWITCHPROBE                                              $13,498.00
     1.0000                                                                            $13,498.00
     4.0000             COISCO GIGABIT ETHERNET ADAPTER FOR                               $800.00
     4.0000             LOCAL DIRECTOR                                                  $3,200.00
     1.0000             CWSI CAMPUS 2.4 BUNDLED W/ESSENTIALS 2.2                        $7,496.00
     1.0000             FOR NT                                                          $7,496.00
     1.0000             CISCO SECURE SCANNER                                              $495.00
     1.0000                                                                               $495.00
     1.0000             CISCO SECURE MANAGER                                            $4,995.00
     1.0000                                                                             $4,995.00
---------------------------------------------------------------------------------------------------

                                                                          TOTAL       $313,750.00
     Remit to:                                                     MISC CHARGES
     DIMENSION DATA                                                     FREIGHT
     135 NEWBURY STREET                                    SALES TAX AT
     FRAMINGHAM, MA 01701                                                TOTAL        $313,750.00
                                                                   PAYMENT REC'D
                                                                     BALANCE DUE
                                                           ----------------------------------------
</TABLE>
<PAGE>

135 Newbury Street
Framingham, MA 01701
                                ------------------------------------
                                PG          INV NO          INV DATE
Sales & Admin  (508) 620-1800   ------------------------------------
Service & Rtns (508) 620-1120    2        INV00033000        6/22/00    [LOGO]
--------------------------------------------------------------------------------
                                                                      DIMENSION
                                                                      _____ DATA

SOLD  CISCO SYSTEMS CAPITAL CORP                    SHIP cMeRun
TO:   170 WEST TASMAN DRIVE                         TO:  ONE CABOT STREET
      MS SJC2/3                                          HUDSON, MA 01719
      SAN JOSE, CA 95134-1706
      ATTN: BARBARA KLENNER

<TABLE>
<CAPTION>
---------------------------------------------------------------------------------------------------
ORDER   ORDER   CUST.       SALES                        SHIP              SHIP          TERMS
 NO     DATE     NO         PERSON          P0#          VIA               DATE
---------------------------------------------------------------------------------------------------
                                          CSC-10319                                     NET 30 DAYS
---------------------------------------------------------------------------------------------------
 QTY ORDERED                                                            PRICE UNIT     UNIT PRICE
 -----------                ITEM NO.                     ITEM           ---------------------------
 QTY SHIPPED            QUANTITY BACK ORD.            DESCRIPTION       ITEM DISC    EXTENDED PRICE
---------------------------------------------------------------------------------------------------
<S>                     <C>                                                           <C>
                        BALANCE FORWARD                                               $313,750.00
     2.0000             ATLIGA VPN GATEWAY                                             $15,200.00
     2.0000                                                                            $30,400.00
     1.0000             SITE INSTALLATION                                              $42,000.00
     1.0000                                                                            $42,000.00
---------------------------------------------------------------------------------------------------

                                                                          TOTAL       $386,150.00
     Remit to:                                                     MISC CHARGES
     DIMENSION DATA                                                     FREIGHT
     135 NEWBURY STREET                                    SALES TAX AT
     FRAMINGHAM, MA 01701                                                TOTAL        $386,150.00
                                                                   PAYMENT REC'D
                                                                     BALANCE DUE
                                                           ----------------------------------------
</TABLE>

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