EXHIBIT 10.75

                                                            [IBM LOGO]
                                                            3039 Cornwallis Road
                                                            RTP, NC 27709

July 8, 2004

Brocade Communications Systems, Inc.
1745 Technology Drive
San Jose, CA  95110

Attention: Mr. Michael Harrison

Subject: Amendment 17 to SOW#1 of the IBM/Brocade Goods Agreement ROC-P-68

Dear Michael:

This letter (the "Amendment") serves as Amendment Number 17 to SOW#1, including
all amendments thereto ("SOW#1") of the Goods Agreement ROC-P-68, which the
parties hereto do mutually agree to amend as follows:

1. Delete pricing table in Section 2.1, "Pricing," in its entirety and replace
with the following:



IBM P/N / NUMA-Q
     P/N              BROCADE P/N               DESCRIPTION           UNIT PRICE
- ----------------      -----------      ----------------------------   -----------
                                                             
[*]                   [*]              8-Port Fibre Channel Switch            [*]
                                       Single Power Supply (SW2400)
                                       Includes [*]- whole unit
                                       switch Product

[*]                   [*]              16 Port Fibre Channel                  [*]
                                       Switch Single Power Supply
                                       (SW2800) Includes
                                       [*]- whole unit switch
                                       Product

[*]                   [*]              Silkworm 2000 Power Supply             [*]

[*]                   [*]              Mainboard, SW 2400 (8-port)            [*]

[*]                   [*]              Fan Tray, SW 2400 (8-port)             [*]

[*]                   [*]              Chassis, SW 2400 (8-port)              [*]

[*]                   [*]              Mainboard, SW 2800                     [*]
                                       (16-port)

[*]                   [*]              Fan Tray, SW 2800 (16-port)            [*]

[*]                   [*]              Chassis, SW 2800 (16-port)             [*]
                                       with operator panel / LCD

[*]                   [*]              Quick Loop License                     [*]

[*]                   [*]              Fabric Watch License                   [*]

[*]                   [*]              Extended Fabrics                       [*]

[*]                   [*]              Extended Fabrics                       [*]


"-------------------
**CERTAIN INFORMATION ON THIS PAGE HAS BEEN OMITTED AND FILED SEPARATELY WITH
THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN
REQUESTED WITH RESPECT TO THE OMITTED PORTIONS."

                                        1




                                                             
[*]                   [*]              Remote Switch                          [*]

[*]                   [*]              Remote Switch                          [*]

[*]                   [*]              8 Port Fibre Channel Switch            [*]
                                       Single Power
                                       Supply (SW3200)
                                       Includes [*]
                                       (to be included
                                       prior to
                                       10/28/03 for
                                       availability
                                       for Buyer
                                       customer
                                       shipments)

[*]                   [*]              8 Port Fibre Channel Switch            [*]
                                       Single Power Supply (SW3200)
                                       Includes [*]                           [*]

[*]                   [*]              Full Fabric Upgrade                    [*]
                                       Includes [*]

[*]                   [*]              16 Port Fibre Channel                  [*]
                                       Switch Single Power Supply
                                       (SW3800) Includes [*]- whole
                                       unit switch Product

[*]                   [*]              Fan (SW3800)                           [*]

[*]                   [*]              Power Supply (SW3800)                  [*]

[*]                   [*]              Mainboard FRU (SW3800)                 [*]

[*]                   [*]              32 Port Fibre Channel                  [*]
                                       Switch Double Power Supply
                                       (SW3900) Includes, [*]-
                                       whole unit switch Product

[*]                   [*]              Fan (SW3900)                           [*]

[*]                   [*]              Power Supply (SW3900)                  [*]

[*]                   [*]              Mainboard FRU (SW3900)                 [*]

[*]                   [*]              Secure Fabric OS (SW3200)              [*]

[*]                   [*]              Secure Fabric OS (SW3800)              [*]

[*]                   [*]              1Gb Secure Fabric OS                   [*]

[*]                   [*]              Secure Fabric OS (SW3900)              [*]

[*]                   [*]              Secure Fabric OS (SW12000)             [*]
                                                                              [*]

[*]                   [*]              Performance Bundle ([*])               [*]

[*]                   [*]              Performance Bundle ([*])               [*]

[*]                   [*]              32 Port Fibre Channel Core             [*]
                                       Switch (SW12000) [*].                  [*]


"-------------------
**CERTAIN INFORMATION ON THIS PAGE HAS BEEN OMITTED AND FILED SEPARATELY WITH
THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN
REQUESTED WITH RESPECT TO THE OMITTED PORTIONS."

                                        2




                                                             
[*]                   [*]              Rack Mounting Kit 14U, FRU             [*]

[*]                   [*]              Switch Blade 16 port, 2GB              [*]

[*]                   [*]              Switch Blade 16 port,                  [*]
                                       2Gb, FRU

[*]                   [*]              Chassis Door, Includes                 [*]
                                       [*]

[*]                   [*]              Control Processor Blade                [*]

[*]                   [*]              Stiletto Port Blade Slot               [*]
                                       Filler Panel, SW12000, FRU

[*]                   [*]              Power Supply, 180-264VAC,              [*]
                                       1000W, FRU

[*]                   [*]              Blower Assembly, FRU                   [*]

[*]                   [*]              Cable Management Pillar, FRU           [*]

[*]                   [*]              WWN Card                               [*]

[*]                   [*]              Power Plug, Switch and                 [*]
                                       Distribution Panel

[*]                   [*]              Chassis FRU, includes [*].             [*]

[*]                   [*]              Rear WWN Bezel Assy                    [*]

[*]                   [*]              Cable Management Tray                  [*]

[*]                   [*]              AC Power Cord, FRU                     [*]

[*]                   [*]              AC Power Cord, UK/Ireland,             [*]
                                       250V, FRU

[*]                   [*]              AC Power Cord, Cont. Europe            [*]
                                       CEE7/7, FRU

[*]                   [*]              AC Power Cord, AUST/INZ,               [*]
                                       250V

[*]                   [*]              AC Power Cord, Intl IEC                [*]

[*]                   [*]              Remote Switch software                 [*]

[*]                   [*]              Extended Fabric software               [*]

[*]                   [*]              Fabric Manager 3.x                     [*]

[*]                   [*]              ISL Trunking (SW3200)                  [*]

[*]                   [*]              ISL Trunking (SW3800)                  [*]




BUYER PART
  NUMBER     SUPPLIER PART NUMBER        PRODUCT DESCRIPTION              UNIT PRICE OF PRODUCT   [*]
- ----------   --------------------   -----------------------------------   ---------------------   -----------------
                                                                                      
[*]          [*]                    Fabric Manager 4.x-Enterprise ([*])   [*]                     [*]

[*]          [*]                    Fabric Manager 4.x - 3.0 to 4.x       [*]                     [*]
                                    Upgrade to Enterprise ([*])


"-------------------
**CERTAIN INFORMATION ON THIS PAGE HAS BEEN OMITTED AND FILED SEPARATELY WITH
THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN
REQUESTED WITH RESPECT TO THE OMITTED PORTIONS."

                                        3




                                                                                      
[*]          [*]                    Fabric Manager 4.x with 10 Domains                      [*]   [*]

[*]          [*]                    Fabric Manager 4.x [*]                                  [*]   [*]

[*]          [*]                    Secure Fabric OS (SW12000/24000)                        [*]   [*]

[*]          [*]                    32 Port Fibre Channel Director                          [*]   [*]
                                    (SW24000)Includes [*]

[*]          [*]                    Meteor 16 port, [*]                                     [*]   [*]

[*]          [*]                    Meteor Upgrade kit. Includes: [*]                       [*]   [*]

[*]          [*]                    8 Port Fibre Channel Two Domain                         [*]   [*]
                                    Switch Single Power Supply
                                    (SW3250), Includes [*]

[*]          [*]                    8 Port Fibre Channel Two Domain                         [*]   [*]
                                    Switch Single Power Supply
                                    (SW3250), Includes [*]

[*]          [*]                    16 Port Fibre Channel Four Domain                       [*]   [*]
                                    Switch, Two Fixed Power Supplies
                                    (SW3850), Includes [*]

[*]          [*]                    16 Port Fibre Channel Four Domain                       [*]   [*]
                                    Switch, Two Fixed Power Supplies
                                    (SW3850),Includes [*]                                   [*]

[*]          [*]                    Secure Fabric OS (SW3850)                               [*]   [*]

[*]          [*]                    Secure Fabric OS (SW3250)                               [*]   [*]

[*]          [*]                    Meteor FRU Chassis , includes [*],                      [*]   [*]

[*]          [*]                    Meteor FRU, Chassis Door.                               [*]   [*]
                                    Includes [*]

[*]          [*]                    Meteor Switch Blade 16 port, 2Gb,                       [*]   [*]
                                    FRU

[*]          [*]                    Meteor Control Processor Blade, FRU                     [*]   [*]

[*]          [*]                    FRU, Power Supply Filler Panels                         [*]   [*]

[*]          [*]                    Extended Fabric                                         [*]   [*]

[*]          [*]                    Remote Switch                                           [*]   [*]

[*]          [*]                    Performance Bundle ([*])                                [*]   [*]

[*]          [*]                    Four Domain to Full Fabric Upgrade                      [*]   [*]

[*]          [*]                    Extended Fabric                                         [*]   [*]

[*]          [*]                    Remote Switch                                           [*]   [*]

[*]          [*]                    Performance Bundle ([*])                                [*]   [*]


"-------------------
**CERTAIN INFORMATION ON THIS PAGE HAS BEEN OMITTED AND FILED SEPARATELY WITH
THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN
REQUESTED WITH RESPECT TO THE OMITTED PORTIONS."

                                        4




                                                                                      
[*]          [*]                    Two Domain to Full Fabric Upgrade                       [*]   [*]
                                    includes [*]

[*]          [*]                    8 port Switch FRU                                       [*]   [*]
                                    [*]

[*]          [*]                    [*]                                                     [*]   [*]

[*]          [*]                    16 port Switch FRU                                      [*]   [*]
                                    [*]

[*]          [*]                    [*]                                                     [*]   [*]


**For purpose of calculating the fees for [*] as described in Section [*], the
[*] for each part number where it is applicable as follows:



IBM
PART      BROCADE PRODUCT
NUMBER      PART NUMBER                  PRODUCT DESCRIPTION            [*]
- ------    ---------------    ----------------------------------------   --------------
                                                               
[*]       [*]                32 Port Fibre Channel Director (SW24000)
                             Includes [*]                                          [*]

[*]       [*]                Meteor Upgrade kit. Includes: [*]                     [*]

[*]       [*]                8 Port Fibre Channel Two Domain Switch                [*]
                             Single Power Supply (SW3250), Includes [*]

[*]       [*]                8 Port Fibre Channel Two Domain Switch                [*]
                             Single Power Supply (SW3250),
                             Includes [*]

[*]       [*]                16 Port Fibre Channel Four Domain                     [*]
                             Switch, Two Fixed Power Supplies
                             (SW3850), Includes [*]

[*]       [*]                16 Port Fibre Channel Four Domain                     [*]
                             Switch, Two Fixed Power Supplies
                             (SW3850), Includes [*]

[*]       [*]                Fabric Manager 4.x-Enterprise ([*])                   [*]

[*]       [*]                Fabric Manager 4.x  - 3.0 to 4.x                      [*]
                             Upgrade to Enterprise ([*])

[*]       [*]                Fabric Manager 4.x with 10 Domains                    [*]

[*]       [*]                Fabric Manager 4.x [*]                                [*]

[*]       [*]                Secure Fabric OS (SW3850)                             [*]

[*]       [*]                Secure Fabric OS (SW3250)                             [*]

[*]       [*]                Secure Fabric OS (SW12000/24000)                      [*]


"-------------------
**CERTAIN INFORMATION ON THIS PAGE HAS BEEN OMITTED AND FILED SEPARATELY WITH
THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN
REQUESTED WITH RESPECT TO THE OMITTED PORTIONS."

                                        5



OUT OF WARRANTY REPAIR PRICING:

[*]
[*]

ACCEPTED AND AGREED TO:                      ACCEPTED AND AGREED TO:
INTERNATIONAL BUSINESS                       BROCADE COMMUNICATIONS
MACHINES CORPORATION                         SYSTEMS, INC.

By:  /s/ Robert J. Tice       7/15/04        By:   /s/ Michael Klayko    7/12/04
   ------------------------------------         --------------------------------
     Authorized Signature          Date            Authorized Signature  Date

     Robert J. Tice                                Michael Klayko
- ---------------------------------------      -----------------------------------
     Type or Print Name                            Type or Print Name

     OEM Procurement Team Lead                     VP, Sales
- ---------------------------------------      -----------------------------------
     Title & Organization                          Title & Organization

"-------------------
**CERTAIN INFORMATION ON THIS PAGE HAS BEEN OMITTED AND FILED SEPARATELY WITH
THE SECURITIES AND EXCHANGE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN
REQUESTED WITH RESPECT TO THE OMITTED PORTIONS."

                                        6