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EP 4 320 825 A1

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(43) Date of publication: 14.02.2024 Bulletin 2024/07 (21) Application number: 22720150.6 (22) Date of filing: 07.04.2022

(51) International Patent Classification (IPC):  H04L 12/46(2006.01) H04L 41/06(2022.01) H04L 45/02(2022.01) H04L 12/66(2006.01) H04L 41/40(2022.01) (52) Cooperative Patent Classification (CPC): H04L 12/46; H04L 12/66; H04L 41/40; H04L 45/04; H04L 41/06 (86) International application number: PCT/US2022/023867 (87) International publication number: WO 2022/216950 (13.10.2022 Gazette 2022/41)

(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: 08.04.2021 US 202163172463 P 29.07.2021 US 202117389122 (71) Applicant: Cisco Technology, Inc. San Jose, California 95134-1706 (US)

(72) Inventors: CHIGANMI, Avinash Ashok Kumar Fremont, California 94539 (US) VENKATAPATHY, Venkatraman Fremont, California 94536 (US) VALENTINI, Giorgio Walnut Creek, California 94598 (US) KOLLI, Madhuri San Jose, California 95135 (US) GUNASEKARAN, Karumbayiram Fremont, California 94538 (US) SUNDARARAJAN, Balaji Fremont, California 94555 (US) (74) Representative: Warren, Caroline Elisabeth et al Mathys & Squire The Shard 32 London Bridge Street London SE1 9SG London SE1 9SG (GB)