(19)

(11)

EP 1 757 039 A2

(12)

(43) Date of publication: 28.02.2007 Bulletin 2007/09 (21) Application number: 05745706.1 (22) Date of filing: 19.04.2005

(51) International Patent Classification (IPC):  H04L 12/56(2006.01) (86) International application number: PCT/US2005/013191 (87) International publication number: WO 2005/109788 (17.11.2005 Gazette 2005/46)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR LV MK YU (30) Priority: 26.04.2004 US 832796 25.08.2004 US 927602 25.08.2004 US 927290 25.08.2004 US 927175 (71) Applicant: Cisco Technology, Inc. San Jose, CA 95134 (US)	(72) Inventors: PANIGRAHY, Rina Sunnyvale, CA 94087 (US) LIU, Jacqueline Sunnyvale, CA 94087 (US) NG, Daniel Yu-Kuwong San Jose, CA 95134 (US) JAIN, Sanjay Santa Clara, CA 95051 (US) BAGEPALLI, Nagaraj San Jose, CA 95134 (US) PATRA, Abhijit San Jose, CA 95129 (US) (74) Representative: Kazi, Ilya et al Mathys & Squire 120 Holborn GB-London EC1N 2SQ GB-London EC1N 2SQ (GB)