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EP 4 302 466 A1

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(43) Date of publication: 10.01.2024 Bulletin 2024/02 (21) Application number: 22711717.3 (22) Date of filing: 16.02.2022

(51) International Patent Classification (IPC):  H04L 45/00(2022.01) H04L 45/64(2022.01) H04L 45/02(2022.01) H04L 45/302(2022.01) (52) Cooperative Patent Classification (CPC): H04L 45/02; H04L 45/64; H04L 45/306; H04L 45/00; H04L 45/76; H04L 47/24 (86) International application number: PCT/US2022/016607 (87) International publication number: WO 2022/186984 (09.09.2022 Gazette 2022/36)

(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: 02.03.2021 US 202163155639 P 05.10.2021 US 202117494441 (71) Applicant: Cisco Technology, Inc. San Jose, California 95134-1706 (US)

(72) Inventors: RODRIGUEZ-NATAL, Alberto Redwood City, California 94061 (US) WOOD, Steven William Ottawa, Ontario K1Z 6W6 (CA) BAI, Ding San Jose, California 95132 (US) MAINO, Fabio R. Palo Alto, California 94301 (US) LAKSHMIKANTHAN, Ramanathan Santa Clara, California 95051 (US) (74) Representative: Warren, Caroline Elisabeth et al Mathys & Squire The Shard 32 London Bridge Street London SE1 9SG London SE1 9SG (GB)