Document:

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                                                                    Exhibit 10.1

                          CHANGE IN CONTROL AGREEMENT

     This Change in Control Agreement (the "Agreement") dated December 1, 2000
is between Riverstone Networks, Inc. (the "Company") and Romulus Pereira,
President of the Company (the "Executive").

     The Company believes that it is desirable, in order to induce the Executive
to remain in the employ of the Company and its direct and indirect subsidiaries
(together, the "Employer") in the event of any actual or threatened change in
control of the Company and to remain in the employ of its parent, Cabletron
Systems, Inc. ("Cabletron") and its direct and indirect subsidiaries (together,
the "Cabletron Companies") in the event of any actual or threatened change in
control of Cabletron Systems, Inc., to provide certain benefits to the Executive
if his employment with the Employer or the Cabletron Companies terminates under
the circumstances described below.  Accordingly, the parties hereto agree as
follows:

     1.  Agreement of the Executive.  As a precondition to the receipt of any
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benefits under this Agreement, the Executive hereby agrees that once any Person
other than the Company, a direct or indirect subsidiary of the Company, or an
employee benefit plan of the Company or any such subsidiary begins a tender or
exchange offer or a solicitation of proxies from the Company's security holders
or takes other actions to effect a "Change in Control" or a "Cabletron Change in
Control," both as hereinafter defined, the Executive will not voluntarily
terminate his employment with the Employer (or the Cabletron Companies, in the
case of a Cabletron Change in Control) until such Person has abandoned or
terminated such efforts to effect a Change in Control (or a Cabletron Change in
Control) or until a Change in Control (or a Cabletron Change in Control) has
occurred.  (For purposes of the Agreement, a "Person" means any individual,
entity or other person, including a group within the meaning of  Sections 13(d)
or 14(d)(2) of the Securities Exchange Act of 1934 ("Exchange Act")).

     2.  Change in Control.  For purposes of the Agreement, a "Change in
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Control" shall be deemed to have occurred upon the occurrence of any of the
events described in subsections (a) or (b) below:

         (a)  Prior to the date, if any, on which Cabletron shall have completed
     a distribution to the Cabletron stockholders of all of the shares of the
     Company held by Cabletron, whether or not preceded by an initial public
     offering of the Company's shares (a "spin-off"), Cabletron shall sell or
     otherwise dispose of (including, without limitation, by merger) all or
     substantially all of the stock of the Company that Cabletron owns, or the
     Company shall sell or otherwise dispose of all or substantially all of its
     assets, to an unrelated Person or to one or more unrelated Persons acting
     as a group; provided that, for the avoidance of doubt, none of the
     following shall constitute a Change in Control under this paragraph (a):
     (i) a spin-off; (ii) a liquidation or merger of the Company into Cabletron
     or into another subsidiary of Cabletron; (iii) any other reorganization of
     the Company or other transaction that results in Cabletron's continuing to
     own, directly or indirectly, a majority of the combined voting power of all
     outstanding shares of stock or other equity interests of the Company or of
     the entity resulting from such reorganization
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or other transaction; or (iv) a disposition by Cabletron of stock of the
Company, or by the Company of its stock, in a public offering.

     (b)  Following a spin-off by Cabletron of the Company,

          (i)  any Person acquires beneficial ownership (within the meaning of
     Rule 13d-3 promulgated under the Exchange Act) of 30% or more of either (A)
     the then outstanding shares of common stock of the Company (the
     "Outstanding Company Common Stock") or (B) the combined voting power of the
     then outstanding voting securities of the Company entitled to vote
     generally in the election of directors (the "Outstanding Company Voting
     Securities"); provided, that for purposes of this subsection (b)(i) the
     following acquisitions shall not constitute a Change in Control: (1) any
     acquisition directly from the Company, (2) any acquisition by the Company,
     (3) any acquisition by an employee benefit plan (or related trust)
     sponsored or maintained by the Company, or (4) any Business Combination
     (but except as provided in subsection (iii) of this Section 2(b) a Business
     Combination may nevertheless constitute a Change in Control under Section
     2(b)(iii)); and provided further, that an acquisition by a Person of 30% or
     more but less than 50% of the Outstanding Company Common Stock or of the
     combined voting power of the Outstanding Company Voting Securities shall
     not constitute a Change in Control under this subsection (b)(i) if within
     15 days of the date the Board of Directors of the Company (the "Board") is
     advised that such ownership level has been reached, a majority of the
     "Incumbent Directors" (as hereinafter defined) then in office adopt a
     resolution approving the acquisition of that level of securities ownership
     by such Person; or

          (ii)  Individuals who, as of the first date following the spin-off
     (the "Spin Date"), constituted the Board (the "Incumbent Directors") cease
     for any reason to constitute at least a majority of the Board; provided,
     that any individual who becomes a member of the Board subsequent to the
     Spin Date and whose election or nomination for election was approved by a
     vote of at least two-thirds of the Incumbent Directors shall be treated as
     an Incumbent Director unless he or she assumed office as a result of an
     actual or threatened election contest with respect to the election or
     removal of directors; or

          (iii) There is consummated a reorganization, merger or consolidation
     involving the Company, or a sale or other disposition of all or
     substantially all of the assets of the Company (a "Business Combination"),
     in each case unless, following such Business Combination, (A) the Persons
     who were the beneficial owners, respectively, of the Outstanding Company
     Common Stock and of the combined voting power of the Outstanding Company
     Voting Securities immediately prior to the Business Combination
     beneficially own, directly or indirectly, more than 50% of, respectively,
     the then outstanding shares of common stock and the combined voting power
     of the then outstanding voting securities entitled to vote generally in the
     election of directors, as the case may be, of the entity resulting from
     such Business Combination in substantially the same proportions as their
     ownership immediately prior to such

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     Business Combination of the Outstanding Company Common Stock and of the
     combined voting power of the Outstanding Company Voting Securities, as the
     case may be, (B) no Person (excluding any entity resulting from such
     Business Combination or any employee benefit plan (or related trust) of the
     Company or of such corporation resulting from such Business Combination)
     beneficially owns, directly or indirectly, 30% or more of, respectively,
     the then outstanding shares of common stock of the corporation resulting
     from such Business Combination or the combined voting power of the then
     outstanding voting securities of such corporation entitled to vote
     generally in the election of directors, except to the extent that such
     ownership existed prior to the Business Combination and (C) at least a
     majority of the members of the Board resulting from such Business
     Combination were Incumbent Directors at the time of the execution of the
     initial agreement, or of the action of the Board, providing for such
     Business Combination; or

          (iv)  The stockholders of the Company approve a complete liquidation
     or dissolution of the Company.

     3.  Severance Benefit. If, during the period of eighteen (18) months
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following a Change in Control, either (i) the employment of the Executive is
terminated by the Employer for any reason other than for "Cause" (as defined in
Section 6 below), or (ii) the Executive terminates his employment with the
Employer for "Good Reason" (as defined in Section 7 below):

         (a) The Company shall pay to the Executive in cash, within five (5)
     days of the date of termination, the sum of (i) all salary earned by the
     Executive as of the date of termination but not yet paid, (ii) the
     Executive's accrued vacation earned through the date of termination, and
     (iii) an amount equal to the Executive's target incentive bonus, if any,
     for the fiscal year in which termination occurs, multiplied times a
     fraction, the numerator of which is the number of days elapsed between the
     beginning of such year and the date of termination reduced by any periods
     (expressed in days) for which amounts under such incentive bonus
     arrangement have already been paid in such year and the denominator of
     which is 365.

         (b) The Company shall also pay to the Executive in cash, within ten
     (10) days of the date of termination, the sum of the Executive's Base
     Salary and Bonus. "Base Salary" for this purpose means the Executive's
     annual rate of base salary as determined immediately prior to the date of
     termination (or, if higher, his annual rate of base salary as determined
     immediately prior to the Change in Control), and "Bonus" means the highest
     aggregate amount of bonus or incentive compensation paid in cash to the
     Executive (or that would have been so paid absent deferral) by the Company
     (or Cabletron) for any one of the three most recent fiscal years ended
     prior to such termination (or, if higher, the Executive's target incentive
     bonus for the fiscal year in which the Change in Control occurs).

         (c) The Executive, together with his dependents, will continue for the
     duration of the "coverage continuation period" (as hereinafter defined) to
     be eligible to participate at the Company's expense (subject to any
     applicable waiting periods or similar requirements to

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     the extent such requirements had not been satisfied prior to the date of
     termination, and subject to the payment by the Executive or his dependents
     of premiums, co-pays or similar amounts at rates not greater than those
     applicable immediately prior to the Change in Control to active employees
     and their dependents) in all medical, dental and life insurance plans or
     programs maintained or sponsored by the Company immediately prior to the
     Change in Control; provided, that if such continued participation is
     impracticable, the Company may provide the Executive with the full value of
     the cost of such coverage paid promptly in cash. For purposes of this
     subsection, the "coverage continuation period" means the one (1) year
     period following the Executive's termination of employment; provided, that
     if the plan or program in question, or applicable law, provides for a
     longer period of coverage following termination of employment, such longer
     period shall constitute the "coverage continuation period" with respect to
     that plan or program. If the coverage continuation period with respect to a
     plan or program exceeds one (1) year following the Executive's termination
     of employment, the terms and conditions of coverage following the first-
     year anniversary of the date of the Executive's termination of employment
     shall be as set forth in the plan or program or as prescribed by applicable
     law. Notwithstanding the foregoing provisions of this subsection, if the
     Executive becomes reemployed by another employer and is eligible (together
     with his dependents) for medical, dental or life insurance coverage that is
     substantially equivalent to the coverage of the same type that he (and his
     dependents) were entitled to receive under this subsection, the Company's
     obligation to the Executive and his dependents under this subsection shall
     cease with respect to that type of coverage.

         (d) Each Company stock option or other stock-based award held by the
     Executive prior to the Change in Control (an "affected award") shall be
     vested (and, in the case of an award requiring exercise, exercisable)
     (vesting and exercisability of such awards being referred to for purposes
     of this subsection (d), without distinction, as "vesting"), immediately
     prior to the termination of employment, for the "applicable number of
     shares" as hereinafter defined. In the event the Executive holds an
     affected award requiring exercise, the Company shall give the Executive
     adequate notice and opportunity to exercise any portion of the affected
     award that becomes exercisable by reason of this subsection. For purposes
     of this subsection (d), the term "applicable number of shares" means, in
     the case of any award, that number of shares for which the award, but for
     the operation of any limitation deferring scheduled vesting until the date
     of a spin-off, would have been vested by the end of the seven (7) month
     period following the termination of employment had the Executive holding
     the award immediately prior to the termination of employment continued in
     service during such seven (7) month period.

     4.  Cabletron Change in Control. For purposes of the Agreement, a
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"Cabletron Change in Control" shall be deemed to have occurred upon the
occurrence, prior to the earlier of a spin-off by Cabletron of the Company or a
Change in Control described in Section 2(a) above, of any of the events
described in subsections (a), (b), (c) and (d) below:

         (a) Any Person acquires beneficial ownership (within the meaning of
     Rule 13d-3 promulgated under the Exchange Act) of 30% or more of either (i)
     the then outstanding shares of common stock of Cabletron (the "Outstanding
     Cabletron Common Stock") or

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     (ii) the combined voting power of the then outstanding voting securities of
     Cabletron entitled to vote generally in the election of directors (the
     "Outstanding Cabletron Voting Securities"); provided, that for purposes of
     this subsection (a) the following acquisitions shall not constitute a
     Cabletron Change in Control: (I) any acquisition directly from Cabletron,
     (II) any acquisition by Cabletron, (III) any acquisition by an employee
     benefit plan (or related trust) sponsored or maintained by Cabletron or its
     subsidiary, or (IV) any Cabletron Business Combination (but except as
     provided in subsection (c) of this Section 4 a Cabletron Business
     Combination may nevertheless constitute a Cabletron Change in Control under
     that subsection); and provided further, that an acquisition by a Person of
     30% or more but less than 50% of the Outstanding Cabletron Common Stock or
     of the combined voting power of the Outstanding Cabletron Voting Securities
     shall not constitute a Cabletron Change in Control under this subsection
     (a) if within 15 days of being advised that such ownership level has been
     reached, a majority of the "Incumbent Directors" (as hereinafter defined)
     then in office adopt a resolution approving the acquisition of that level
     of securities ownership by such Person; or

         (b) Individuals who, as of the date of this Agreement, constituted the
     Cabletron Board of Directors (the "Cabletron Incumbent Directors") cease
     for any reason to constitute at least a majority of the Board; provided,
     that any individual who becomes a member of the Cabletron Board of
     Directors subsequent to the date of this Agreement and whose election or
     nomination for election was approved by a vote of at least two-thirds of
     the Incumbent Directors shall be treated as a Cabletron Incumbent Director
     unless he or she assumed office as a result of an actual or threatened
     election contest with respect to the election or removal of directors; or

         (c) There is consummated a reorganization, merger or consolidation
     involving Cabletron, or a sale or other disposition of all or substantially
     all of the assets of Cabletron (a "Cabletron Business Combination"), in
     each case unless, following such Cabletron Business Combination, (i) the
     Persons who were the beneficial owners, respectively, of the Outstanding
     Cabletron Common Stock and of the combined voting power of the Outstanding
     Cabletron Voting Securities immediately prior to the Cabletron Business
     Combination beneficially own, directly or indirectly, more than 50% of,
     respectively, the then outstanding shares of common stock and the combined
     voting power of the then outstanding voting securities entitled to vote
     generally in the election of directors, as the case may be, of the entity
     resulting from such Cabletron Business Combination in substantially the
     same proportions as their ownership immediately prior to such Cabletron
     Business Combination of the Outstanding Cabletron Common Stock and of the
     combined voting power of the Outstanding Cabletron Voting Securities, as
     the case may be, (ii) no Person (excluding any entity resulting from such
     Cabletron Business Combination or any employee benefit plan (or related
     trust) of Cabletron or its subsidiary or of such corporation resulting from
     such Cabletron Business Combination) beneficially owns, directly or
     indirectly, 30% or more of, respectively, the then outstanding shares of
     common stock of the corporation resulting from such Cabletron Business
     Combination or the combined voting power of the then outstanding voting
     securities of such corporation entitled to vote generally in the election
     of directors, except to the extent that such ownership existed prior to the
     Cabletron Business Combination and (iii) at least a

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     majority of the members of the Cabletron Board of Directors resulting from
     such Cabletron Business Combination were Cabletron Incumbent Directors at
     the time of the execution of the initial agreement, or of the action of the
     Cabletron Board of Directors, providing for such Cabletron Business
     Combination; or

         (d) The stockholders of Cabletron approve a complete liquidation or
     dissolution of Cabletron.

     5.  Cabletron-related Severance Benefit.  If, in the eighteen (18) months
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following a Cabletron Change in Control, either (i) the employment of the
Executive is terminated by the Cabletron Companies for any reason other than for
"Cause" (as defined in Section 6 below), or (ii) the Executive terminates his
employment with the Cabletron Companies for "Good Reason" (as defined in Section
7 below):

         (a) The Company shall pay to the Executive in cash, within five (5)
     days of the date of termination, the sum of (i) all salary earned by the
     Executive as of the date of termination but not yet paid, (ii) the
     Executive's accrued vacation earned through the date of termination, and
     (iii) an amount equal to the Executive's target incentive bonus, if any,
     for the fiscal year in which termination occurs, multiplied times a
     fraction, the numerator of which is the number of days elapsed between the
     beginning of such year and the date of termination reduced by any periods
     (expressed in days) for which amounts under such incentive bonus
     arrangement have already been paid in such year and the denominator of
     which is 365.

         (b) The Company shall pay to the Executive in cash, within ten (10)
     days of the date of termination, the sum of the Executive's Base Salary and
     Bonus. "Base Salary" for this purpose means the Executive's annual rate of
     base salary as determined immediately prior to the date of termination (or,
     if higher, his annual rate of base salary as determined immediately prior
     to the Cabletron Change in Control), and "Bonus" means the highest
     aggregate amount of bonus or incentive compensation paid in cash to the
     Executive (or that would have been so paid absent deferral) by the Company
     (or Cabletron) for any one of the three most recent fiscal years ended
     prior to such termination (or, if higher, the Executive's target incentive
     bonus for the fiscal year in which the Cabletron Change in Control occurs).

         (c) The Executive, together with his dependents, will continue for the
     duration of the "coverage continuation period" (as hereinafter defined) to
     be eligible to participate at the Company's expense (subject to any
     applicable waiting periods or similar requirements to the extent such
     requirements had not been satisfied prior to the date of termination, and
     subject to the payment by the Executive or his dependents of premiums, co-
     pays or similar amounts at rates not greater than those applicable
     immediately prior to the Cabletron Change in Control to active employees
     and their dependents) in all medical, dental and life insurance plans or
     programs maintained or sponsored by the Company immediately prior to the
     Cabletron Change in Control; provided, that if such continued participation
     is impracticable, the Company may provide the Executive with the full value
     of the cost of such coverage paid promptly in cash. For purposes of this
     subsection,

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     the "coverage continuation period" means the one (1) year period following
     the Executive's termination of employment; provided, that if the plan or
     program in question, or applicable law, provides for a longer period of
     coverage following termination of employment, such longer period shall
     constitute the "coverage continuation period" with respect to that plan or
     program. If the coverage continuation period with respect to a plan or
     program exceeds one (1) year following the Executive's termination of
     employment, the terms and conditions of coverage following the first-year
     anniversary of the date of the Executive's termination of employment shall
     be as set forth in the plan or program or as prescribed by applicable law.
     Notwithstanding the foregoing provisions of this subsection, if the
     Executive becomes reemployed by another employer and is eligible (together
     with his dependents) for medical, dental or life insurance coverage that is
     substantially equivalent to the coverage of the same type that he (and his
     dependents) were entitled to receive under this subsection, the Company's
     obligation to the Executive and his dependents under this subsection shall
     cease with respect to that type of coverage.

         (d) Each Company stock option or other stock-based award held by the
     Executive prior to the Cabletron Change in Control (an "affected award")
     shall be vested (and, in the case of an award requiring exercise,
     exercisable) (vesting and exercisability of such awards being referred to
     for purposes of this subsection (d), without distinction, as "vesting"),
     immediately prior to the termination of employment, for the "applicable
     number of shares" as hereinafter defined. In the event the Executive holds
     an affected award requiring exercise, the Company shall give the Executive
     adequate notice and opportunity to exercise any portion of the affected
     award that becomes exercisable by reason of this subsection. For purposes
     of this subsection (d), the term "applicable number of shares" means, in
     the case of any award, that number of shares for which the award, but for
     the operation of any limitation deferring scheduled vesting until the date
     of a spin-off, would have been vested by the end of the eighteen (18) month
     period following the termination of employment had the Executive holding
     the award immediately prior to the termination of employment continued in
     service during such eighteen (18) month period.

For purposes of this Section 5, a termination of the Executive's employment with
the Cabletron Companies shall not be deemed to have occurred solely by reason of
the fact that the Company ceases to be a direct or indirect subsidiary of
Cabletron, but a termination of the Executive's employment with the Company
(other than for "Cause"), or a termination by the Executive of his employment
with the Company for "Good Reason," in either case occurring within eighteen
(18) months following a Cabletron Change in Control, shall be treated as a
termination described in the first sentence of this Section 5 whether or not, at
the time of such termination, the Company is still a direct or indirect
subsidiary of Cabletron.

     6.  Cause. "Cause" means only: (a) the Executive's conviction of, or a plea
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of nolo contendere with respect to, a crime involving moral turpitude or a
felony; (b) the Executive's refusal to perform, or gross negligence in the
performance of, his duties to the Employer; or (c) an act of willful misfeasance
by the Executive that is intended to result in substantial personal enrichment
of the Executive at the expense of the Employer.

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     7.  Voluntary Termination for Good Reason.  The Executive shall be deemed
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to have voluntarily terminated his employment for Good Reason if he leaves the
employ of the Employer (or the Cabletron Companies, in the case of a Cabletron
Change in Control) for any of the following reasons:

         (a) Any action by the Company which results in a material diminution in
     the Executive's position, authority, duties or responsibilities immediately
     prior to the Change in Control (or Cabletron Change in Control), excluding
     for this purpose an isolated, insubstantial and inadvertent action not
     taken in bad faith and which is remedied by the Company promptly after
     receipt of notice thereof given by the Executive; provided, however, that a
     sale or transfer of some or all of the business of the Company or Cabletron
     or any of their subsidiaries or other reduction in their business or that
     of their subsidiaries, or the fact that the Company or Cabletron shall
     become a subsidiary of another company or the securities of the Company or
     Cabletron shall no longer be publicly traded, shall not constitute "Good
     Reason" hereunder; or

         (b) Any reduction in the Executive's rate of annual base salary for any
     fiscal year to less than the greater of 100% of the rate of annual base
     salary paid to him in the completed fiscal year immediately preceding the
     Change in Control (or Cabletron Change in Control) or 100% of the rate at
     which annual base salary was being paid to the Executive immediately prior
     to such reduction; or

         (c) Any failure of the Company to continue or cause to be continued in
     effect any retirement, life, medical, dental, disability, accidental death
     or travel insurance plan in which the Executive was participating
     immediately prior to the Change in Control (or Cabletron Change in Control)
     unless the Company provides the Executive with a plan or plans that provide
     substantially equivalent benefits, or the taking of any action by the
     Company that would adversely effect the Executive's participation in or
     materially reduce the Executive's benefits under any such plan or deprive
     the Executive of any material fringe benefit enjoyed by the Executive
     immediately prior to the Change in Control (or Cabletron Change in
     Control), other than an isolated, insubstantial and inadvertent failure not
     occurring in bad faith and which is remedied by the Company promptly after
     receipt of notice thereof given by the Executive; or

         (d) The Company requires the Executive to be based at any office or
     location that is more than 50 miles distant from his base office or work
     location immediately prior to the Change in Control (or Cabletron Change in
     Control).

     8.  Certain Tax-Related Payments.
         ----------------------------

         (a) If any "payment in the nature of compensation" (hereinafter
     "Payment") as that term is used in Section 280G of the Internal Revenue
     Code of 1986, as amended (the "Code"), including but not limited to
     payments and benefits under the Agreement (other than payments pursuant to
     this Section 8) and any "Cabletron CIC program" (as defined in Section 13
     below), made with respect to the Executive, is determined to be subject to
     the excise tax imposed by Section 4999 of the Code (the "Section 4999
     tax"), the

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     Company will pay to the Executive an additional amount in cash (the "Gross-
     Up Payment") which, after reduction for all taxes (including, but not
     limited to, the Section 4999 tax with respect to such Additional Amount),
     is sufficient to pay the Section 4999 tax and all related interest and
     penalties, if any, with respect to the Payment. All determinations under
     this section shall be made at the Company's expense by a nationally
     recognized accounting firm selected by the Company.

         (b) If there is a determination by the Internal Revenue Service (the
     "IRS") with respect to the Executive that is inconsistent with a
     determination pursuant to Section 8(a) and that if sustained would result
     in a Section 4999 tax (or a greater Section 4999 tax) or in interest or
     penalties (or increased interest or penalties) with respect to any such tax
     (an "initial IRS determination"), the determination under Section 8(a)
     shall be deemed automatically modified to conform to the initial IRS
     determination and the Company, upon receipt from the IRS of the initial IRS
     determination or of written notice from the Executive setting forth the
     initial IRS determination, shall promptly pay to the Executive the
     additional Gross-Up Payment required by such modification (the "Additional
     Gross-Up Payment"). The Company may elect to contest at its expense any
     initial IRS determination in respect of which the Company has made an
     Additional Gross-Up Payment, in which case such Additional Gross-Up Payment
     shall be considered an interest-free loan (the "Loan") to Executive until
     such time as the IRS's determination is withdrawn or modified or otherwise
     becomes final (a "final IRS determination"). Upon a final IRS determination
     that is no longer subject to modification or judicial review and that
     results in a Section 4999 tax and related interest and penalties lower than
     those in respect of which the Additional Gross-Up Payment was made, the
     Executive shall repay to the Company so much of the Loan, if any, as shall
     leave the Executive on an after-tax basis in the same position he would
     have been in had the initial IRS determination never been made. The
     Executive shall cooperate reasonably with the Company in any effort by the
     Company to contest an IRS determination under this paragraph, including by
     the making of such filings and appeals as the Company may reasonably
     require, but nothing herein shall be construed as requiring Executive to
     bear any cost or expense of such a contest or in connection therewith to
     compromise any tax item (including without limitation any deduction or
     credit) other than the Section 4999 tax and related interest and penalties,
     if any, that are the subject of the contested IRS determination.

     9.  Binding Effect on Successor Entity.  If the Company is merged or
         ----------------------------------
consolidated into or with any other entity (whether or not the Company is the
surviving entity), or if substantially all of the assets of the Company are
transferred to another entity, the provisions of the Agreement will be binding
upon and inure to the benefit of the entity resulting from such merger or
consolidation or the acquirer of such assets (the "Successor Entity").  The
Company will require any such Successor Entity to assume expressly and agree to
perform the provisions of the Agreement in the same manner and to the same
extent that the Company would have been required to perform if no such
transaction had taken place.

     10. Payment Obligations Absolute.  Upon termination of employment described
         ----------------------------
in Section 3 or 5, the Company's obligations to pay the Severance Benefits
described in Section 3 or 5 shall be absolute and unconditional and shall not be
affected by any circumstances,

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including, without limitation, any set-off, counterclaim, recoupment, defense or
other right which the Company may have against the Executive. In no event shall
the Executive be obligated to seek other employment or take any other action by
way of mitigation of the amounts payable to the Executive under any of the
provisions of the Agreement and, except as otherwise provided in Section 3(c) or
5(c), in no event shall the amount of any payment hereunder be reduced by any
compensation earned by the Executive as a result of employment by another
employer.

     11. Limited Effect.  Nothing herein shall be construed as giving the
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Executive a right of continued employment or as limiting the Company's right to
terminate the Executive's employment, subject, in the case of any such
termination described in Section 3 or 5, to the payment of the benefits
described in Section 3 or 5.

     12. Amendment and Termination.  This Agreement may be amended at any time
         -------------------------
and from time to time and may be terminated at any time upon written consent of
both parties hereto.

     13. No Duplication of Benefits.  For the avoidance of doubt and
         --------------------------
notwithstanding any provision of the Plan to the contrary, under no
circumstances shall the Executive be entitled to receive cash severance benefits
under both Section 3(a), (b), and (c) and Section 5(a), (b), and (c). In any
case in which the Agreement might otherwise be construed to entitle the
Executive to receive cash severance benefits under both such sets of provisions,
the Executive shall be entitled to receive cash severance benefits only under
Section 3(a), (b), and (c). Also, the benefits and rights to benefits under this
Agreement are in lieu of any and all benefits (other than the acceleration of
stock options) that may become due to the Executive under any change in control
plan or program of Cabletron (any such plan or program, a "Cabletron CIC
program"), and the Executive, for himself and his heirs, beneficiaries and
assigns, hereby expressly waives and relinquishes any right that he may have to
any such benefits under any Cabletron CIC program. The parties hereto
acknowledge and agree that the Executive does not hereby waive any right or
entitlement to the acceleration of stock option awards to the extent such
acceleration may be provided under any Cabletron CIC program.

     14. Withholding.  All payments and benefits hereunder shall be subject to
         -----------
reduction for applicable tax withholdings.

     15. Indemnification.  The Company agrees to pay all costs and expenses
         ---------------
incurred by the Executive in connection with efforts to enforce his rights under
this Agreement and will indemnify and hold harmless the Executive from and
against any damages, liabilities and expenses (including without limitation
reasonable fees and expenses of counsel) incurred by the Executive in connection
with any litigation or threatened litigation, including any regulatory
proceedings, arising out of the making, performance or enforcement of this
Agreement.

     16. Source of Payment.  Nothing herein shall be construed as establishing a
         -----------------
trust or as requiring the Company to set aside funds to meet its obligations
hereunder.  Notwithstanding the foregoing, if the Board in its discretion so
determines the Company may establish a so-called "rabbi trust" or similar
arrangement to assist it in meeting any such obligations that it may have.

                                      -10-
<PAGE>

     17. Governing Law.  The Agreement shall be governed by the laws of the
         -------------
State of New Hampshire.

     IN WITNESS WHEREOF, the Company has caused this Agreement to be executed by
its duly authorized officer and the Executive has executed this Agreement as of
the date first written above.

                                          RIVERSTONE NETWORKS, INC.

                                          By:  /s/  Piyush Patel
                                             -----------------------------

                                          ROMULUS PEREIRA

                                             /s/  Romulus S. Pereira
                                             -----------------------------

                                      -11-<PAGE>

                                                                    Exhibit 10.2
                                                                    ------------

                     APRISMA MANAGEMENT TECHNOLOGIES, INC.

                      Change-in-Control Severance Benefit
                            Plan for Key Employees

     Aprisma Management Technologies, Inc. (including any "Successor Entity" as
defined in Section 10, the "Company") adopts this plan (the "Plan") with the
intent of assuring that it and its direct and indirect subsidiaries (together
with the Company, the "Employer") will have the benefit of continuity of
management in the event of any actual or threatened change in control.

     1.   Eligibility. The Board of Directors of the Company (the "Board") or
its designee shall from time to time designate participants in the Plan
("Participants") from among the Employer's key employees. An employee once
designated a Participant shall continue to be a Participant (subject to
satisfaction of the requirements set forth in Section 2 below) until the earlier
of (a) the date (not later than the 180th day preceding a "Change in Control" or
a "Cabletron Change in Control," both as hereinafter defined) on which the Board
determines that he or she is no longer eligible to participate in the Plan (as
evidenced by written notice thereof), and (b) the date he or she ceases to be
employed by the Employer (or by Cabletron Systems, Inc. ("Cabletron") and its
direct and indirect subsidiaries (together, the "Cabletron Companies"), in the
case of a Cabletron Change in Control); provided, that a Participant who ceases
to be employed by the Employer under circumstances giving rise to benefits under
the Plan shall continue to be treated as a Participant with respect to such
benefits until they have been paid or provided in full.

     2.   Agreement of Participants. As a precondition to participation in the
Plan, each individual who is designated a Participant must enter into a written
agreement (each, a "Plan Agreement") in accordance with procedures prescribed by
and in a form acceptable to the Board. Each Plan Agreement shall contain:

          (a)  the Participant's binding commitment to the effect that once any
     Person other than the Company, a direct or indirect subsidiary of the
     Company, or an employee benefit plan of the Company or any such subsidiary
     begins a tender or exchange offer or a solicitation of proxies from the
     Company's security holders or takes other actions to effect a "Change in
     Control" or a "Cabletron Change in Control," both as hereinafter defined,
     the Participant will not voluntarily terminate his or her employment with
     the Employer (or the Cabletron Companies, in the case of a Cabletron Change
     in Control) until such Person has abandoned or terminated such efforts to
     effect a Change in Control (or a Cabletron Change in Control) or until a
     Change in Control (or a Cabletron Change in Control) has occurred (for
     purposes of the Plan, a "Person" means any individual, entity or other
     person, including a group within the meaning of Sections 13(d) or 14(d)(2)
     of the Securities Exchange Act of 1934 ("Exchange Act")); and
<PAGE>

          (b)  such other terms, if any, as the Board may specify, which may (if
     the Board so provides) deviate from the terms generally set forth in the
     Plan.

As applied to any Participant, the term "Plan" means the terms and provisions of
the Plan set forth herein as modified by the terms and provisions of the
Participant's Plan Agreement.

     3.   Change in Control.  For purposes of the Plan, a "Change in Control"
          -----------------
shall be deemed to have occurred upon the occurrence of any of the events
described in subsections (a) or (b) below:

          (a)  Prior to the date, if any, on which Cabletron shall have
     completed a distribution to the Cabletron stockholders of all of the shares
     of the Company held by Cabletron, whether or not preceded by an initial
     public offering of the Company's shares (a "spin-off"), Cabletron shall
     sell or otherwise dispose of (including, without limitation, by merger) all
     or substantially all of the stock of the Company that Cabletron owns, or
     the Company shall sell or otherwise dispose of all or substantially all of
     its assets, to an unrelated Person or to one or more unrelated Persons
     acting as a group; provided that, for the avoidance of doubt, none of the
     following shall constitute a Change in Control under this paragraph (a):
     (i) a spin-off; (ii) a liquidation or merger of the Company into Cabletron
     or into another subsidiary of Cabletron; (iii) any other reorganization of
     the Company or other transaction that results in Cabletron's continuing to
     own, directly or indirectly, a majority of the combined voting power of all
     outstanding shares of stock or other equity interests of the Company or of
     the entity resulting from such reorganization or other transaction; or (iv)
     a disposition by Cabletron of stock of the Company, or by the Company of
     its stock, in a public offering.

          (b)  Following a spin-off by Cabletron of the Company,

               (i)  any Person acquires beneficial ownership (within the meaning
          of Rule 13d-3 promulgated under the Exchange Act) of 30% or more of
          either (A) the then outstanding shares of common stock of the Company
          (the "Outstanding Company Common Stock") or (B) the combined voting
          power of the then outstanding voting securities of the Company
          entitled to vote generally in the election of directors (the
          "Outstanding Company Voting Securities"); provided, that for purposes
          of this subsection (b)(i) the following acquisitions shall not
          constitute a Change in Control: (1) any acquisition directly from the
          Company, (2) any acquisition by the Company, (3) any acquisition by an
          employee benefit plan (or related trust) sponsored or maintained by
          the Employer, or (4) any Business Combination (but except as provided
          in subsection (iii) of this Section 3(b) a Business Combination may
          nevertheless constitute a Change in Control under Section 3(b)(iii));
          and provided further, that an acquisition by a Person of 30% or more
          but less than 50% of the Outstanding Company Common Stock or of the
          combined voting power of the Outstanding Company Voting Securities
          shall not constitute a Change in Control under this subsection (b)(i)
          if within 15 days of the Board's being advised that such ownership
          level has been reached, a majority of the "Incumbent Directors" (as

                                      -2-
<PAGE>

          hereinafter defined) then in office adopt a resolution approving the
          acquisition of that level of securities ownership by such Person; or

               (ii)   Individuals who, as of the first date following the spin-
          off (the "Spin Date"), constituted the Board (the "Incumbent
          Directors") cease for any reason to constitute at least a majority of
          the Board; provided, that any individual who becomes a member of the
          Board subsequent to the Spin Date and whose election or nomination for
          election was approved by a vote of at least two-thirds of the
          Incumbent Directors shall be treated as an Incumbent Director unless
          he or she assumed office as a result of an actual or threatened
          election contest with respect to the election or removal of directors;
          or

               (iii)  There is consummated a reorganization, merger or
          consolidation involving the Company, or a sale or other disposition of
          all or substantially all of the assets of the Company (a "Business
          Combination"), in each case unless, following such Business
          Combination, (A) the Persons who were the beneficial owners,
          respectively, of the Outstanding Company Common Stock and of the
          combined voting power of the Outstanding Company Voting Securities
          immediately prior to the Business Combination beneficially own,
          directly or indirectly, more than 50% of, respectively, the then
          outstanding shares of common stock and the combined voting power of
          the then outstanding voting securities entitled to vote generally in
          the election of directors, as the case may be, of the entity resulting
          from such Business Combination in substantially the same proportions
          as their ownership immediately prior to such Business Combination of
          the Outstanding Company Common Stock and of the combined voting power
          of the Outstanding Company Voting Securities, as the case may be, (B)
          no Person (excluding any entity resulting from such Business
          Combination or any employee benefit plan (or related trust) of the
          Employer or of such corporation resulting from such Business
          Combination) beneficially owns, directly or indirectly, 30% or more
          of, respectively, the then outstanding shares of common stock of the
          corporation resulting from such Business Combination or the combined
          voting power of the then outstanding voting securities of such
          corporation entitled to vote generally in the election of directors,
          except to the extent that such ownership existed prior to the Business
          Combination and (C) at least a majority of the members of the Board
          resulting from such Business Combination were Incumbent Directors at
          the time of the execution of the initial agreement, or of the action
          of the Board, providing for such Business Combination; or

               (iv)   The stockholders of the Company approve a complete
          liquidation or dissolution of the Company.

     4.   Severance Benefit. If, during the period of eighteen (18) months
          -----------------
following a Change in Control, either (i) the employment of a Participant is
terminated by the Employer for any reason other than for "Cause" (as defined in
Section 7 below), or (ii) the Participant terminates his or her employment with
the Employer for "Good Reason" (as defined in Section 8 below):

                                      -3-
<PAGE>

          (a)  The Company shall pay to the Participant in cash, within five (5)
     days of the date of termination, the sum of (i) all salary earned by the
     Participant as of the date of termination but not yet paid, (ii) the
     Participant's accrued vacation earned through the date of termination, and
     (iii) an amount equal to the Participant's target incentive bonus, if any,
     for the fiscal year in which termination occurs, multiplied times a
     fraction, the numerator of which is the number of days elapsed between the
     beginning of such year and the date of termination reduced by any periods
     (expressed in days) for which amounts under such incentive bonus
     arrangement have already been paid in such year and the denominator of
     which is 365.

          (b)  The Company shall also pay to the Participant in cash, within ten
     (10) days of the date of termination, the sum of the Participant's Base
     Salary and Bonus. "Base Salary" for this purpose means the Participant's
     annual rate of base salary as determined immediately prior to the date of
     termination (or, if higher, his or her annual rate of base salary as
     determined immediately prior to the Change in Control), and "Bonus" means
     the highest aggregate amount of bonus or incentive compensation paid in
     cash to the Participant (or that would have been so paid absent deferral)
     by the Company (or Cabletron) for any one of the three most recent fiscal
     years ended prior to such termination (or, if higher, the Participant's
     target incentive bonus for the fiscal year in which the Change in Control
     occurs).

          (c)  The Participant, together with his or her dependents, will
     continue for the duration of the "coverage continuation period" (as
     hereinafter defined) to be eligible to participate at the Employer's
     expense (subject to any applicable waiting periods or similar requirements
     to the extent such requirements had not been satisfied prior to the date of
     termination, and subject to the payment by the Participant or his or her
     dependents of premiums, co-pays or similar amounts at rates not greater
     than those applicable immediately prior to the Change in Control to active
     employees and their dependents) in all medical, dental and life insurance
     plans or programs maintained or sponsored by the Employer immediately prior
     to the Change in Control; provided, that if such continued participation is
     impracticable, the Company may provide the Participant with the full value
     of the cost of such coverage paid promptly in cash. For purposes of this
     subsection, the "coverage continuation period" means the one (1) year
     period following the Participant's termination of employment; provided,
     that if the plan or program in question, or applicable law, provides for a
     longer period of coverage following termination of employment, such longer
     period shall constitute the "coverage continuation period" with respect to
     that plan or program. If the coverage continuation period with respect to a
     plan or program exceeds one (1) year following the Participant's
     termination of employment, the terms and conditions of coverage following
     the first-year anniversary of the date of the Participant's termination of
     employment shall be as set forth in the plan or program or as prescribed by
     applicable law. Notwithstanding the foregoing provisions of this
     subsection, if the Participant becomes reemployed by another employer and
     is eligible (together with his or her dependents) for medical, dental or
     life insurance coverage that is substantially equivalent to the coverage of
     the same type that he or she (and his or her dependents) were entitled to
     receive under this subsection, the

                                      -4-
<PAGE>

     Employer's obligation to the Participant and his or her dependents under
     this subsection shall cease with respect to that type of coverage.

          (d)  Each Company stock option or other stock-based award held by the
     Participant prior to the Change in Control (an "affected award") shall be
     vested (and, in the case of an award requiring exercise, exercisable)
     (vesting and exercisability of such awards being referred to for purposes
     of this subsection (d), without distinction, as "vesting"), immediately
     prior to the termination of employment, for the "applicable number of
     shares" as hereinafter defined.  In the event a Participant holds an
     affected award requiring exercise, the Company shall give the Participant
     adequate notice and opportunity to exercise any portion of the affected
     award that becomes exercisable by reason of this subsection.  For purposes
     of this subsection (d), the term "applicable number of shares" means, in
     the case of any award, that number of shares for which the award, but for
     the operation of any limitation deferring scheduled vesting until the date
     of a spin-off, would have been vested by the end of the seven (7) month
     period following the termination of employment had the Participant holding
     the award immediately prior to the termination of employment continued in
     service during such seven (7) month period.

     5.   Cabletron Change in Control. For purposes of the Plan, a "Cabletron
          ---------------------------
Change in Control" shall be deemed to have occurred upon the occurrence, prior
to the earlier of a spin-off by Cabletron of the Company or a Change in Control
described in Section 3(a) above, of any of the events described in subsections
(a), (b), (c) and (d) below:

          (a)  Any Person acquires beneficial ownership (within the meaning of
     Rule 13d-3 promulgated under the Exchange Act) of 30% or more of either (i)
     the then outstanding shares of common stock of Cabletron (the "Outstanding
     Cabletron Common Stock") or (ii) the combined voting power of the then
     outstanding voting securities of Cabletron entitled to vote generally in
     the election of directors (the "Outstanding Cabletron Voting Securities");
     provided, that for purposes of this subsection (a) the following
     acquisitions shall not constitute a Cabletron Change in Control: (A) any
     acquisition directly from Cabletron, (B) any acquisition by Cabletron, (C)
     any acquisition by an employee benefit plan (or related trust) sponsored or
     maintained by Cabletron or its subsidiary, or (D) any Cabletron Business
     Combination (but except as provided in subsection (c) of this Section 3 a
     Cabletron Business Combination may nevertheless constitute a Cabletron
     Change in Control under that subsection); and provided further, that an
     acquisition by a Person of 30% or more but less than 50% of the Outstanding
     Cabletron Common Stock or of the combined voting power of the Outstanding
     Cabletron Voting Securities shall not constitute a Cabletron Change in
     Control under this subsection (a) if within 15 days of being advised that
     such ownership level has been reached, a majority of the "Incumbent
     Directors" (as hereinafter defined) then in office adopt a resolution
     approving the acquisition of that level of securities ownership by such
     Person; or

          (b)  Individuals who, as of the Effective Date of this Plan,
     constituted the Cabletron Board of Directors (the "Cabletron Incumbent
     Directors") cease for any reason to

                                      -5-
<PAGE>

     constitute at least a majority of the Board; provided, that any individual
     who becomes a member of the Cabletron Board of Directors subsequent to the
     Effective Date of this Plan and whose election or nomination for election
     was approved by a vote of at least two-thirds of the Incumbent Directors
     shall be treated as a Cabletron Incumbent Director unless he or she assumed
     office as a result of an actual or threatened election contest with respect
     to the election or removal of directors; or

          (c)  There is consummated a reorganization, merger or consolidation
     involving Cabletron, or a sale or other disposition of all or substantially
     all of the assets of Cabletron (a "Cabletron Business Combination"), in
     each case unless, following such Cabletron Business Combination, (i) the
     Persons who were the beneficial owners, respectively, of the Outstanding
     Cabletron Common Stock and of the combined voting power of the Outstanding
     Cabletron Voting Securities immediately prior to the Cabletron Business
     Combination beneficially own, directly or indirectly, more than 50% of,
     respectively, the then outstanding shares of common stock and the combined
     voting power of the then outstanding voting securities entitled to vote
     generally in the election of directors, as the case may be, of the entity
     resulting from such Cabletron Business Combination in substantially the
     same proportions as their ownership immediately prior to such Cabletron
     Business Combination of the Outstanding Cabletron Common Stock and of the
     combined voting power of the Outstanding Cabletron Voting Securities, as
     the case may be, (ii) no Person (excluding any entity resulting from such
     Cabletron Business Combination or any employee benefit plan (or related
     trust) of Cabletron or its subsidiary or of such corporation resulting from
     such Cabletron Business Combination) beneficially owns, directly or
     indirectly, 30% or more of, respectively, the then outstanding shares of
     common stock of the corporation resulting from such Cabletron Business
     Combination or the combined voting power of the then outstanding voting
     securities of such corporation entitled to vote generally in the election
     of directors, except to the extent that such ownership existed prior to the
     Cabletron Business Combination and (iii) at least a majority of the members
     of the Cabletron Board of Directors resulting from such Cabletron Business
     Combination were Cabletron Incumbent Directors at the time of the execution
     of the initial agreement, or of the action of the Cabletron Board of
     Directors, providing for such Cabletron Business Combination; or

          (d)  The stockholders of Cabletron approve a complete liquidation or
     dissolution of Cabletron.

     6.   Cabletron-related Severance Benefit.  If, in the eighteen (18) months
          -----------------------------------
following a Cabletron Change in Control, either (i) the employment of a
Participant is terminated by the Cabletron Companies for any reason other than
for "Cause" (as defined in Section 7 below), or (ii) the Participant terminates
his or her employment with the Cabletron Companies for "Good Reason" (as defined
in Section 8 below):

          (a)  The Company shall pay to the Participant in cash, within five (5)
     days of the date of termination, the sum of (i) all salary earned by the
     Participant as of the date of termination but not yet paid, (ii) the
     Participant's accrued vacation earned through the

                                      -6-
<PAGE>

     date of termination, and (iii) an amount equal to the Participant's target
     incentive bonus, if any, for the fiscal year in which termination occurs,
     multiplied times a fraction, the numerator of which is the number of days
     elapsed between the beginning of such year and the date of termination
     reduced by any periods (expressed in days) for which amounts under such
     incentive bonus arrangement have already been paid in such year and the
     denominator of which is 365.

          (b)  The Company shall also pay to the Participant in cash, within ten
     (10) days of the date of termination, the sum of the Participant's Base
     Salary and Bonus. "Base Salary" for this purpose means the Participant's
     annual rate of base salary as determined immediately prior to the date of
     termination (or, if higher, his or her annual rate of base salary as
     determined immediately prior to the Change in Control), and "Bonus" means
     the highest aggregate amount of bonus or incentive compensation paid in
     cash to the Participant (or that would have been so paid absent deferral)
     by the Company (or Cabletron) for any one of the three most recent fiscal
     years ended prior to such termination (or, if higher, the Participant's
     target incentive bonus for the fiscal year in which the Change in Control
     occurs).

          (c)  The Participant, together with his or her dependents, will
     continue for the duration of the "coverage continuation period" (as
     hereinafter defined) to be eligible to participate at the Employer's
     expense (subject to any applicable waiting periods or similar requirements
     to the extent such requirements had not been satisfied prior to the date of
     termination, and subject to the payment by the Participant or his or her
     dependents of premiums, co-pays or similar amounts at rates not greater
     than those applicable immediately prior to the Change in Control to active
     employees and their dependents) in all medical, dental and life insurance
     plans or programs maintained or sponsored by the Employer immediately prior
     to the Change in Control; provided, that if such continued participation is
     impracticable, the Company may provide the Participant with the full value
     of the cost of such coverage paid promptly in cash. For purposes of this
     subsection, the "coverage continuation period" means the one (1) year
     period following the Participant's termination of employment; provided,
     that if the plan or program in question, or applicable law, provides for a
     longer period of coverage following termination of employment, such longer
     period shall constitute the "coverage continuation period" with respect to
     that plan or program. If the coverage continuation period with respect to a
     plan or program exceeds one (1) year following the Participant's
     termination of employment, the terms and conditions of coverage following
     the first-year anniversary of the date of the Participant's termination of
     employment shall be as set forth in the plan or program or as prescribed by
     applicable law. Notwithstanding the foregoing provisions of this
     subsection, if the Participant becomes reemployed by another employer and
     is eligible (together with his or her dependents) for medical, dental or
     life insurance coverage that is substantially equivalent to the coverage of
     the same type that he or she (and his or her dependents) were entitled to
     receive under this subsection, the Employer's obligation to the Participant
     and his or her dependents under this subsection shall cease with respect to
     that type of coverage.

                                      -7-
<PAGE>

          (d)  Each Company stock option or other stock-based award held by the
     Participant prior to the Cabletron Change in Control (an "affected award")
     shall be vested (and, in the case of an award requiring exercise,
     exercisable) (vesting and exercisability of such awards being referred to
     for purposes of this subsection (d), without distinction, as "vesting"),
     immediately prior to the termination of employment, for the "applicable
     number of shares" as hereinafter defined. In the event the Participant
     holds an affected award requiring exercise, the Company shall give the
     Participant adequate notice and opportunity to exercise any portion of the
     affected award that becomes exercisable by reason of this subsection. For
     purposes of this subsection (d), the term "applicable number of shares"
     means, in the case of any award, that number of shares for which the award,
     but for the operation of any limitation deferring scheduled vesting until
     the date of a spin-off, would have been vested by the end of the twelve
     (12) month period following the termination of employment had the
     Participant holding the award immediately prior to the termination of
     employment continued in service during such twelve (12) month period.

For purposes of this Section 6, a termination of a Participant's employment with
the Cabletron Companies shall not be deemed to have occurred solely by reason of
the fact that the Company ceases to be a direct or indirect subsidiary of
Cabletron, but a termination of a Participant's employment by the Company (other
than for "Cause"), or a termination by a Participant of his or her employment
with the Company for "Good Reason," in either case occurring within eighteen
(18) months following a Cabletron Change in Control, shall be treated as a
termination described in the first sentence of this Section 6 whether or not, at
the time of such termination, the Company is still a direct or indirect
subsidiary of Cabletron.

     7.   Cause. "Cause" means only: (a) the Participant's conviction of, or a
          -----
plea of nolo contendere with respect to, a crime involving moral turpitude or a
felony; (b) the Participant's refusal to perform, or gross negligence in the
performance of, his or her duties to the Employer; or (c) an act of willful
misfeasance by the Participant that is intended to result in substantial
personal enrichment of the Participant at the expense of the Employer.

     8.   Voluntary Termination for Good Reason. A Participant shall be deemed
          -------------------------------------
to have voluntarily terminated his or her employment for Good Reason if he or
she leaves the employ of the Employer (or the Cabletron Companies, in the case
of a Cabletron Change in Control) for any of the following reasons:

          (a)  Any action by the Company which results in a material diminution
     in Participant's position, authority, duties or responsibilities
     immediately prior to the Change in Control (or Cabletron Change in
     Control), excluding for this purpose an isolated, insubstantial and
     inadvertent action not taken in bad faith and which is remedied by the
     Company promptly after receipt of notice thereof given by the Participant;
     provided, however, that a sale or transfer of some or all of the business
     of the Company or any of its subsidiaries or other reduction in its
     business or that of its subsidiaries, or the fact that the Company shall
     become a subsidiary of another company or the securities of the Company
     shall no longer be publicly traded, shall not constitute "Good Reason"
     hereunder; or

                                      -8-
<PAGE>

          (b)  Any reduction in the Participant's rate of annual base salary for
     any fiscal year to less than the greater of 100% of the rate of annual base
     salary paid to him or her in the completed fiscal year immediately
     preceding the Change in Control (or Cabletron Change in Control) or 100% of
     the rate at which annual base salary was being paid to the Participant
     immediately prior to such reduction; or

          (c)  Any failure of the Company to continue or cause to be continued
     in effect any retirement, life, medical, dental, disability, accidental
     death or travel insurance plan in which the Participant was participating
     immediately prior to the Change in Control (or Cabletron Change in Control)
     unless the Company provides the Participant with a plan or plans that
     provide substantially equivalent benefits, or the taking of any action by
     the Employer that would adversely effect the Participant's participation in
     or materially reduce the Participant's benefits under any such plan or
     deprive the Participant of any material fringe benefit enjoyed by the
     Participant immediately prior to the Change in Control (or Cabletron Change
     in Control), other than an isolated, insubstantial and inadvertent failure
     not occurring in bad faith and which is remedied by the Employer promptly
     after receipt of notice thereof given by the Participant; or

          (d)  The Company requires the Participant to be based at any office or
     location that is more than 50 miles distant from the Participant's base
     office or work location immediately prior to the Change in Control (or
     Cabletron Change in Control).

     9.   Certain Tax-Related Payments.
          ----------------------------

          (a)  If any "payment in the nature of compensation" (hereinafter
     "Payment") as that term is used in Section 280G of the Internal Revenue
     Code of 1986, as amended (the "Code"), including but not limited to
     payments and benefits under the Plan (other than payments pursuant to this
     Section 9) and any "Cabletron CIC program" (as defined in Section 14
     below), made with respect to a Participant is determined to be subject to
     the excise tax imposed by Section 4999 of the Code (the "Section 4999
     tax"), the Company will pay to such Participant an additional amount in
     cash (the "Gross-Up Payment") which, after reduction for all taxes
     (including, but not limited to, the Section 4999 tax with respect to such
     Additional Amount), is sufficient to pay the Section 4999 tax and all
     related interest and penalties, if any, with respect to the Payment. All
     determinations under this Section shall be made at the Company's expense by
     a nationally recognized accounting firm selected by the Company.

          (b)  If there is a determination by the Internal Revenue Service (the
     "IRS") with respect to the Participant that is inconsistent with a
     determination pursuant to Section 9(a) and that if sustained would result
     in a Section 4999 tax (or a greater Section 4999 tax) or in interest or
     penalties (or increased interest or penalties) with respect to any such tax
     (an "initial IRS determination"), the determination under Section 9(a)
     shall be deemed automatically modified to conform to the initial IRS
     determination and the Company, upon receipt from the IRS of the initial IRS
     determination or of written notice from the Participant setting forth the
     initial IRS determination, shall promptly pay to the

                                      -9-
<PAGE>

     Participant the additional Gross-Up Payment required by such modification
     (the "Additional Gross-Up Payment"). The Company may elect to contest at
     its expense any initial IRS determination in respect of which the Company
     has made an Additional Gross-Up Payment, in which case such Additional
     Gross-Up Payment shall be considered an interest-free loan (the "Loan") to
     Participant until such time as the IRS' determination is withdrawn or
     modified or otherwise becomes final (a "final IRS determination"). Upon a
     final IRS determination that is no longer subject to modification or
     judicial review and that results in a Section 4999 tax and related interest
     and penalties lower than those in respect of which the Additional Gross-Up
     Payment was made, the Participant shall repay to the Company so much of the
     Loan, if any, as shall leave the Participant on an after-tax basis in the
     same position he or she would have been in had the initial IRS
     determination never been made. The Participant shall cooperate reasonably
     with the Company in any effort by the Company to contest an IRS
     determination under this paragraph, including by the making of such filings
     and appeals as the Company may reasonably require, but nothing herein shall
     be construed as requiring Participant to bear any cost or expense of such a
     contest or in connection therewith to compromise any tax item (including
     without limitation any deduction or credit) other than the Section 4999 tax
     and related interest and penalties, if any, that are the subject of the
     contested IRS determination.

     10.  Binding Effect on Successor Entity. If the Company is merged or
          ----------------------------------
consolidated into or with any other entity (whether or not the Company is the
surviving entity), or if substantially all of the assets of the Company are
transferred to another entity, the provisions of the Plan will be binding upon
and inure to the benefit of the entity resulting from such merger or
consolidation or the acquirer of such assets (the "Successor Entity"). The
Company will require any such Successor Entity to assume expressly and agree to
perform the provisions of the Plan (including any Plan Agreements) in the same
manner and to the same extent that the Company would have been required to
perform if no such transaction had taken place.

     11.  Payment Obligations Absolute. Upon termination of employment described
          ----------------------------
in Section 4 or 6, the Company's obligations to pay the Severance Benefits
described in Section 4 or 6 shall be absolute and unconditional and shall not be
affected by any circumstances, including, without limitation, any set-off,
counterclaim, recoupment, defense or other right which the Employer may have
against any Participant. In no event shall a Participant be obligated to seek
other employment or take any other action by way of mitigation of the amounts
payable to a Participant under any of the provisions of the Plan and, except as
otherwise provided in Section 4(c) or 6(c), in no event shall the amount of any
payment hereunder be reduced by any compensation earned by a Participant as a
result of employment by another employer.

     12.  Limited Effect. Nothing herein or in any Plan Agreement shall be
          --------------
construed as giving any Participant a right of continued employment or as
limiting the Employer's right to terminate a Participant's employment, subject,
in the case of any such termination described in Section 4 or 6, to the payment
of the benefits described in Section 4 or 6.

                                      -10-
<PAGE>

     13.  Amendment and Termination. The Board may amend the Plan at any time
          -------------------------
and from time to time, and may terminate the Plan at any time; provided, that no
action purporting to amend or terminate the Plan that is approved by the Board
within the one hundred eighty (180) day period immediately preceding a Change in
Control (or a Cabletron Change in Control) and that, if effective, would
adversely affect the rights of any Participant hereunder, shall affect the
rights of such Participant without his or her express written consent.

     14.  No Duplication of Benefits. For the avoidance of doubt and
          --------------------------
notwithstanding any provision of the Plan to the contrary, under no
circumstances shall a Participant be entitled to receive cash severance benefits
under both Section 4(a), (b), and (c) and Section 6(a), (b), and (c). In any
case in which the Plan might otherwise be construed to entitle a Participant to
receive cash severance benefits under both such sets of provisions, the
Participant shall be entitled to receive cash severance benefits only under
Section 4(a), (b), and (c). Also, the benefits and rights to benefits under this
Plan are in lieu of any and all benefits (other than the acceleration of stock
options) that may become due a Participant under any change in control plan or
program of Cabletron (any such plan or program, a "Cabletron CIC program"), and
each Participant, for himself or herself and his or her heirs, beneficiaries and
assigns, hereby expressly waives and relinquishes any right that he or she may
have to any such benefits under any Cabletron CIC program. Notwithstanding the
preceding sentence, a Participant does not hereby waive any right or entitlement
to the acceleration of stock option awards to the extent such acceleration may
be provided under any Cabletron CIC program.

     15.  Withholding.  All payments and benefits hereunder shall be subject to
          -----------
reduction for applicable tax withholdings.

     16.  Indemnification.  The Employer agrees to pay all costs and expenses
          ---------------
incurred by any Participant in connection with efforts to enforce his or her
rights under this Plan and will indemnify and hold harmless any Participant from
and against any damages, liabilities and expenses (including without limitation
reasonable fees and expenses of counsel) incurred by the Participant in
connection with any litigation or threatened litigation, including any
regulatory proceedings, arising out of the making, performance or enforcement of
this Plan.

     17.  Source of Payment. Nothing herein shall be construed as establishing a
          -----------------
trust or as requiring the Company to set aside funds to meet its obligations
hereunder. Notwithstanding the foregoing, if the Board in its discretion so
determines the Company may establish a so-called "rabbi trust" or similar
arrangement to assist it in meeting any such obligations that it may have.

     18.  Effective Date.  The "Effective Date" of the Plan shall be the date on
          --------------
which it is adopted by the Board.

     19.  Governing Law. The Plan and agreements made with Participants
          -------------
hereunder shall be governed by the laws of the State of New Hampshire.

                                      -11-

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