NetApp Completes Sale of NetCache Assets to Blue Coat Systems, Inc.

Sunnyvale, Calif. - September 11, 2006 -- Network Appliance, Inc. (NASDAQ:NTAP), the leader in advanced networked storage solutions, today announced that it has completed the sale of a substantial portion of its NetCache™ assets to Blue Coat® Systems (NASDAQ: BCSI). NetApp will continue to support existing customers' NetCache appliances for the duration of their support contracts, and will honor all currently existing NetCache customer commitments. NetApp considers the transaction to be immaterial to expectations for its business going forward.

For more information regarding this transaction, please see the press release of June 23, 2006 here.

About Network Appliance
Network Appliance is a world leader in unified storage solutions for today's data-intensive enterprise. Since its inception in 1992, Network Appliance has delivered technology, product, and partner firsts that simplify data management. Information about Network Appliance™ solutions and services is available at www.netapp.com.

"Safe Harbor" Statement under U.S. Private Securities Litigation Reform Act of 1995
This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements include Network Appliance's expectation that it will continue to support all currently existing NetCache customers after the closing of the transaction and the expectation that the transaction will not be material to Network Appliance's future business results. These forward-looking statements involve risks and uncertainties, and actual results may vary significantly. Factors that could impact our ability to achieve our goals include the risk that some NetCache customers may not react positively to our sale of the NetCache business, the risk that the transaction could negatively impact our sales to customers in our core businesses and other important factors as described in Network Appliance, Inc.'s reports and documents filed from time to time with the Securities and Exchange Commission, including our most recently submitted 10-K and 10-Q. We disclaim any obligation to update information contained in these forward-looking statements whether as a result of new information, future events or otherwise.

Press Contact:
Jodi Baumann
Network Appliance, Inc.
(408) 822-3974

jodi@netapp.com

Investor Contact:
Tara Calhoun
Network Appliance, Inc.
(408) 822-6909
tara@netapp.com