1 EXHIBIT 99.5 STRATACOM, INC. 1986 INCENTIVE STOCK OPTION PLAN STRATACOM, INC. 1994 STOCK OPTION PLAN CISCO SYSTEMS, INC. STOCK OPTION ASSUMPTION AGREEMENT OPTIONEE: 1~ STOCK OPTION ASSUMPTION AGREEMENT issued as of the 9th day of July, 1996 by Cisco Systems, Inc., a California corporation ("Cisco"). WHEREAS, the undersigned individual ("Optionee") holds one or more outstanding options to purchase shares of the common stock of Stratacom, Inc., a Delaware corporation ("Stratacom"), which were granted to Optionee under the Stratacom, Inc. 1986 Incentive Stock Option Plan and/or the Stratacom, Inc. 1994 Stock Option Plan (the "Plans") and are evidenced by a Stock Option Agreement(s) (the "Option Agreement(s)") between Stratacom and Optionee. WHEREAS, Stratacom has this day been acquired by Cisco through merger of a wholly-owned Cisco subsidiary ("Acquisition Corporation") with and into Stratacom (the "Merger") pursuant to the Agreement and Plan of Merger dated April 21, 1996 by and among Cisco, Stratacom and Acquisition Corporation (the "Merger Agreement"). WHEREAS, the provisions of the Merger Agreement require Cisco to assume all obligations of Stratacom under all options outstanding under the Plan at the consummation of the Merger and to issue to the holder of each outstanding option an agreement evidencing the assumption of such option. WHEREAS, pursuant to the provisions of the Merger Agreement, the exchange ratio in effect for the Merger is one (1) share of Cisco common stock ("Cisco Stock") for each outstanding share of Stratacom common stock (the "Exchange Rate"). WHEREAS, this Agreement is to become effective immediately upon the consummation of the Merger (the "Effective Time") in order to reflect certain adjustments to Optionee's outstanding options under the Plan which have become necessary by reason of the assumption of those options by Cisco in connection with the Merger. NOW, THEREFORE, it is hereby agreed as follows: 1. The number of shares of Stratacom common stock subject to the stock options held by Optionee under the Plan immediately prior to the Effective Time (the "Stratacom Options") and the exercise price payable per share are set forth in Exhibit A 2 hereto. Cisco hereby assumes, as of the Effective Time, all the duties and obligations of Stratacom under each of the Stratacom Options. Such assumption is hereby effected in accordance with the one-for-one Exchange Rate at which shares of Stratacom common stock were converted into shares of Cisco Stock in consummation of the Merger. Accordingly, the number of shares of Cisco Stock purchasable under each Stratacom Option hereby assumed shall be equal to the same number of shares of Stratacom common stock purchasable under that Stratacom Option immediately prior to the Merger, and the exercise price per share payable under each such assumed Stratacom Option shall be equal to the exercise price per share in effect under that Stratacom Option immediately prior to the Merger. The specific number of shares of Cisco Stock subject to each Stratacom Option hereby assumed shall be as set forth for that option in attached Exhibit B, and the exercise price payable per share of Cisco Stock under the assumed Stratacom Option shall be as indicated for that option in attached Exhibit B. 2. The following provisions shall govern each Stratacom Option hereby assumed by Cisco: - Unless the context otherwise requires, all references to the "Company" in each Option Agreement(s) and in the Plan (as incorporated into such Option Agreement(s)) shall mean Cisco, all references to "Shares," "Stock" or "Common Stock" shall mean shares of Cisco Stock, and all references to the "Plan Administrator" shall mean the Compensation Committee of the Cisco Board of Directors. - The grant date and the expiration date of each assumed Stratacom Option and all other provisions which govern either the exercisability or the termination of the assumed Stratacom Option shall remain the same as set forth in the Option Agreement(s) applicable to that option and shall accordingly govern and control Optionee's rights under this Agreement to purchase Cisco Stock. - Each assumed Stratacom Option shall remain exercisable in accordance with the same installment exercise schedule in effect under the applicable Option Agreement(s) immediately prior to the Effective Time, with the number of shares of Cisco Stock subject to each such installment adjusted to reflect the Exchange Rate. Accordingly, no accelerated vesting of the Stratacom Options shall be deemed to occur by reason of the Merger, and the grant date for each assumed Stratacom Option shall accordingly remain the same as in effect under the applicable Option Agreement(s) immediately prior to the Merger. - For purposes of applying any and all provisions of the Option Agreement(s) relating to Optionee's status as an employee with the Company or his or her consulting or advisory relationship with the Company, Optionee shall be deemed to continue in such status or relationship for so long as Optionee renders services as an employee or consultant or advisor, respectively, to Cisco or any present or future Cisco subsidiary, including (without limitation) Stratacom. Accordingly, the provisions of the Option 2. 3 Agreement(s) governing the termination of the assumed Stratacom Option upon the Optionee's cessation of employee, consultant or advisor status with Stratacom shall hereafter be applied on the basis of the Optionee's cessation of employee, consultant or advisor status, as appropriate, with Cisco and its subsidiaries, and each assumed Stratacom Option shall accordingly terminate, within the designated time period in effect under the Option Agreement(s) for that option, following such cessation of employee, consultant or advisor status with Cisco and its subsidiaries. - The exercise price payable for the Cisco Stock subject to each assumed Stratacom Option shall be payable in any of the forms authorized under the Option Agreement(s) applicable to that option. For purposes of determining the holding period of any shares of Cisco Stock delivered in payment of such exercise price, the period for which such shares were held as Stratacom common stock prior to the Merger shall be taken into account. - In order to exercise each assumed Stratacom Option, Optionee must deliver to Cisco a written notice of exercise in which the number of shares of Cisco Stock to be purchased thereunder must be indicated. The exercise notice must be accompanied by payment of the exercise price payable for the purchased shares of Cisco Stock and should be delivered to Cisco at the following address: Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134 Attention: Christine Calice 3. Except to the extent specifically modified by this Option Assumption Agreement, all of the terms and conditions of each Option Agreement(s) as in effect immediately prior to the Merger shall continue in full force and effect and shall not in any way be amended, revised or otherwise affected by this Stock Option Assumption Agreement. IN WITNESS WHEREOF, Cisco Systems, Inc. has caused this Stock Option Assumption Agreement to be executed on its behalf by its duly-authorized officer as of the _____ day of ________, 1996. CISCO SYSTEMS, INC. By: ---------------------------------- 3. 4 ACKNOWLEDGMENT The undersigned acknowledges receipt of the foregoing Stock Option Assumption Agreement and understands that all rights and liabilities with respect to each of his or her Stratacom Options hereby assumed by Cisco Systems, Inc. are as set forth in the Option Agreement(s), the Plan and such Stock Option Assumption Agreement. -------------------------------------- 1~, OPTIONEE DATED: __________________, 1996 4. 5 EXHIBIT A Optionee's Outstanding Options to Purchase Shares of Stratacom, Inc. Common Stock (Pre-Merger) 6 EXHIBIT B Optionee's Outstanding Options to Purchase Shares of Cisco Systems, Inc. Common Stock (Post-Merger)