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EP 4 512 063 A1

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(43) Date of publication: 26.02.2025 Bulletin 2025/09 (21) Application number: 23724993.3 (22) Date of filing: 21.04.2023

(51) International Patent Classification (IPC):  H04L 61/2503(2022.01) H04L 9/40(2022.01) H04L 61/4511(2022.01) (52) Cooperative Patent Classification (CPC): H04L 61/4511; H04L 61/2503; H04L 63/1441; H04L 63/0236 (86) International application number: PCT/US2023/019387 (87) International publication number: WO 2023/205410 (26.10.2023 Gazette 2023/43)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: KH MA MD TN (30) Priority: 22.04.2022 US 202263333641 P 01.02.2023 US 202318104603 (71) Applicant: Cisco Technology, Inc. San Jose, CA 95134-1706 (US)

(72) Inventors: MALUF, David, A. Mountain View, CA 94040 (US) GUNDAVELLI, Srinath San Jose, CA 95135 (US) THUBERT, Pascal 06330 Roquefort Les Pins (FR) KATHAIL, Pradeep, Kumar Los Altos, CA 94024 (US) LEVY-ABEGNOLI, Eric 06560 Valbonne (FR) VOIT, Eric Bethesda, MD 20817 (US) SAJASSI, Ali Alamo, CA 94507 (US) (74) Representative: Mathys & Squire  The Shard 32 London Bridge Street London SE1 9SG London SE1 9SG (GB)