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EP 4 371 285 A1

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(43) Date of publication: 22.05.2024 Bulletin 2024/21 (21) Application number: 22751527.7 (22) Date of filing: 08.07.2022

(51) International Patent Classification (IPC):  H04L 45/00(2022.01) (52) Cooperative Patent Classification (CPC): H04L 45/22; H04L 45/28; H04L 45/42; H04L 47/724 (86) International application number: PCT/US2022/036472 (87) International publication number: WO 2023/287651 (19.01.2023 Gazette 2023/03)

(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 MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 12.07.2021 US 202163220940 P 10.05.2022 US 202217741241 (71) Applicant: Cisco Technology, Inc. San Jose, California 95134-1706 (US)

(72) Inventors: FILSFILS, Clarence 1150 Brussels (BE) ALI, Zafar Hicksville, New York 11801 (US) CLAD, Francois 67200 Strasbourg (FR) DUVIVIER, Bertrand Herbert Guy 5100 Wepion (BE) KOLDYCHEV, Mikhail Ottawa, Ontario K2M 2S5 (CA) GANDHI, Rakesh Stittsville, Ontario K2S 2E3 (CA) SONI, Sagar Ottawa, Ontario K2B 8J6 (CA) (74) Representative: Jarrett, Daniel Phillip et al Kilburn & Strode LLP Lacon London 84 Theobalds Road London WC1X 8NL London WC1X 8NL (GB)