Riverbed Technology (RVBD)

Evaluation of Disclosure Controls and Procedures

We evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of March 31, 2009, the end of the period covered by this quarterly report on Form 10-Q. This controls evaluation was done under the supervision and with the participation of our management, including our Chief Executive Officer (CEO) and Chief Financial Officer (CFO) as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act.

Disclosure controls and procedures are designed to provide reasonable assurance that information required to be disclosed in the reports that we file or submit under the Securities Exchange Act of 1934, such as this quarterly report on Form 10-Q, is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed such that information is accumulated and communicated to our management, including the CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

Based upon the controls evaluation, our CEO and CFO have concluded that as of March 31, 2009, our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified by the Securities and Exchange Commission and to ensure that material information relating to us and our consolidated subsidiaries is made known to management, including the CEO and CFO.

Evaluation of Disclosure Controls and Procedures

We evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of December 31, 2008, the end of the period covered by this Annual Report on Form 10-K. This controls evaluation was done under the supervision and with the participation of our management, including our Chief Executive Officer (CEO) and Chief Financial Officer (CFO) as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act.

Disclosure controls and procedures are designed to provide reasonable assurance that information required to be disclosed in the reports that we file or submit under the Securities Exchange Act of 1934, such as this Annual Report on Form 10-K, is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed such that information is accumulated and communicated to our management, including the CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

Based upon the controls evaluation, our CEO and CFO have concluded that as of December 31, 2008, our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified by the Securities and Exchange Commission and to ensure that material information relating to us and our consolidated subsidiaries is made known to management, including the CEO and CFO.

Evaluation of Disclosure Controls and Procedures

We evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of December 31, 2008, the end of the
period covered by this Annual Report on Form 10-K. This controls evaluation was done under the supervision and with the participation of our management, including our Chief Executive Officer (CEO) and Chief Financial Officer (CFO) as defined in
Rules 13a-15(e) and 15d-15(e) under the Exchange Act.

Disclosure controls and procedures are designed to provide reasonable assurance that
information required to be disclosed in the reports that we file or submit under the Securities Exchange Act of 1934, such as this Annual Report on Form 10-K, is recorded, processed, summarized and reported within the time periods specified in
the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed such that information is accumulated and communicated to our management, including the
CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

Based upon the controls evaluation, our CEO and CFO have
concluded that as of December 31, 2008, our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported
within the time periods specified by the Securities and Exchange Commission and to ensure that material information relating to us and our consolidated subsidiaries is made known to management, including the CEO and CFO.

Evaluation of Disclosure Controls and Procedures

We evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of September 30, 2008, the end of the period covered by this report on Form 10-Q. This controls evaluation was done under the supervision and with the participation of our management, including our Chief Executive Officer (CEO) and Chief Financial Officer (CFO) as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act.

Disclosure controls and procedures are designed to provide reasonable assurance that information required to be disclosed in the reports that we file or submit under the Securities Exchange Act of 1934, such as this report on Form 10-Q, is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed such that information is accumulated and communicated to our management, including the CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

Based upon the controls evaluation, our CEO and CFO have concluded that as of September 30, 2008, our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified by the Securities and Exchange Commission and to ensure that material information relating to us and our consolidated subsidiaries is made known to management, including the CEO and CFO.

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Evaluation of Disclosure Controls and Procedures

We evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of June 30, 2008, the end of the period covered by this report on Form 10-Q. This controls evaluation was done under the supervision and with the participation of our management, including our Chief Executive Officer (CEO) and Chief Financial Officer (CFO) as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act.

Disclosure controls and procedures that are designed to provide reasonable assurance that information required to be disclosed in the reports that we file or submit under the Securities Exchange Act of 1934, such as this report on Form 10-Q, is recorded, processed, summarized and reported within the time periods specified in the Securities Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed such that information is accumulated and communicated to our management, including the CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

Based upon the controls evaluation, our CEO and CFO have concluded that as of June 30, 2008, our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified by the Security Exchange Commission and to ensure that material information relating to us and our consolidated subsidiaries is made known to management, including the CEO and CFO.

Evaluation of Disclosure Controls and Procedures

We evaluated the effectiveness of the design and operation of our disclosure controls and procedures as of March 31, 2008, the end of the period covered by this report on Form 10-Q. This controls evaluation was done under the supervision and with the participation of our management, including our Chief Executive Officer (CEO) and Chief Financial Officer (CFO) as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act.

Disclosure controls and procedures that are designed to provide reasonable assurance that information required to be disclosed in the reports that we file or submit under the Securities Exchange Act of 1934, such as this report on Form 10-Q, is recorded, processed, summarized and reported within the time periods specified in the Securities Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed such that information is accumulated and communicated to our management, including the CEO and CFO, as appropriate to allow timely decisions regarding required disclosure.

Based upon the controls evaluation, our CEO and CFO have concluded that as of March 31, 2008, our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed in our Exchange Act reports is recorded, processed, summarized and reported within the time periods specified by the Security Exchange Commission and to ensure that material information relating to us and our consolidated subsidiaries is made known to management, including the CEO and CFO.

(c.) Evaluation of Disclosure Controls and Procedures

Based on our management’s evaluation (with the participation of our principal executive officer and principal financial officer), as of December 31, 2007, the end of the period covered by this report, our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act) were effective to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms and is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate to allow timely decisions regarding required disclosure.

None.

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(c.) Evaluation of Disclosure Controls and Procedures

Based on our management’s evaluation (with the participation of our principal executive officer and principal financial officer), as of
December 31, 2007, the end of the period covered by this report, our principal executive officer and principal financial officer have concluded that our disclosure controls and procedures (as such term is defined in Rules 13a-15(e) and
15d-15(e) under the Securities Exchange Act of 1934, as amended, or the Exchange Act) were effective to ensure that information required to be disclosed by us in reports that we file or submit under the Exchange Act is recorded, processed,
summarized and reported within the time periods specified in Securities and Exchange Commission rules and forms and is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as
appropriate to allow timely decisions regarding required disclosure.

None.