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(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 12 September 2013 (12.09.2013) I (10) International Publication Number PO PCT WO 2013/132371 A3 (51) International Patent Classification: H04L 12/66 (2006.01) (21) (22) (25) (26) (30) (71) (71) (72) Inventors: KAMBLE, Keshav, Govind; IBM Corpora tion, 4400 N 1st St, Suite 100, San Jose, CA 95 134-1257 (US). PEETHAMBARAM, Nandakumar; IBM Corpora International Application Number: tion, 4400 N 1st St, Suite 100, San Jose, CA 95 134-1257 PCT/IB20 13/05 1338 (US). LEU, Dar-Ren; IBM Corporation, 4400 N 1st St, Suite 100, San Jose, CA 95 134- 1257 (US). PANDEY, ViInternational Filing Date: joy; IBM Corporation, 4400 N 1st St, Suite 100, San Jose, 19 February 2013 (19.02.2013) CA 95134-1257 (US). GHOSH, Nirapada; IBM Corpora English Filing Language: tion, 4400 N 1st St, Suite 100, San Jose, CA 95 134-1257 (US). ANANTHARAM, Sushma; IBM Corporation, 4400 English Publication Language: N 1st St, Suite 100, San Jose, CA 95134-1257 (US). Priority Data: MENDON, Chandarani; IBM Corporation, 4400 N 1st 13/414,684 7 March 2012 (07.03.2012) US St, Suite 100, San Jose, CA 95 134-1257 (US). MUKHERJEE, Nilanjan; IBM Corporation, 4400 N 1st St, Suite Applicant: INTERNATIONAL BUSINESS MA¬ 100, San Jose, CA 95134-1257 (US). CHINES CORPORATION [US/US]; New Orchard Road, Armonk, New York 10504 (US). (74) Agent: LITHERLAND, David; IBM United Kingdom Limited, Intellectual Property Law, Hursley Park, Applicants (for MG only): IBM UNITED KINGDOM Winchester Hampshire S021 2JN (GB). LIMITED [GB/GB]; PO Box 41, North Harbour, Ports mouth Hampshire P06 3AU (GB). IBM (CHINA) IN¬ VESTMENT COMPANY LIMITED [CN/CN]; 25/F, Pangu Plaza, No.27, Central North 4th Ring Road, Chaoyang District, Beijing 100101 (CN). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, [Continued on next page] (54) Title: DIAGNOSTICS IN DISTRIBUTED FABRIC SYSTEM (57) Abstract: A distributed fabric system has distributed line card (DLC) chassis and scaled-out fabric coupler (SFC) chassis. Each DLC chassis includes a network processor and fabric ports. Each network processor of each DLC chassis includes a fabric interface in communic ation with the DLC fabric ports of that DLC chassis. Each SFC chassis includes a fabric element and fabric ports. A communication link con nects each SFC fabric port to one DLC fabric port. Each communica tion link includes cell-carrying lanes. Each fabric element of each SFC chassis collects per-lane statistics for each SFC fabric port of that SFC chassis. Each SFC chassis includes program code that obtains the perlane statistics collected by the fabric element chip of that SFC chassis. A network element includes program code that gathers the per-lane statistics collected by each fabric element of each SFC chassis and in tegrates the statistics into a topology of the entire distributed fabric sy s tem. ΖΩ < TO FIG. 7B FIG. 7A o o w o 2013/132371 A3 1II III II II KR, KZ, LA, LC, LK, LR, LS, LT, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every Mnd of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, III III 11 I III Mil III il III EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, ΓΓ , LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). Published: — with international search report (Art. 21(3)) (88) Date of publication of the international search report: 1 September 20 16 International application No. INTERNATIONAL SEARCH REPORT PCT/IB2013/051338 CLASSIFICATION OF SUBJECT MATTER A. H04L 12/66 (2006.01) i According to International Patent Classification (IPC) or to both national classification and IPC FIELDS SEARCHED B. Minimum documentation searched (classification system followed by classification symbols) IPC: H04L Documentation searched other than minimum documentation to the extent that such documents are included in the fields searched Electronic data base consulted during the international search (name of data base and, where practicable, search terms used) CNPATCNKLEPODOCWPI: PORT, INTERFACE, AGENT, COLLECT+, GATHER+, FABRIC DOCUMENTS CONSIDERED TO BE RELEVANT Category' A Citation of document, with indication, where appropriate, of the relevant passages Relevant to claim No. US 201 1/0131362 A 1(KLINGLESMITH, Michael et al.) 1-19 02 Jun. 2011 (02.06.2011) see abstract, paragraphs -, claims 1-5 A US 2004/0103220 Al(BOSTICK, Bill et al.) 1-19 27 May 2004 (27.05.2004) see the whole document A US 7436845 B l (SUN MICROSYSTEMS, INC.) 1-19 14 Oct. 2008 (14. 10.2008) see the whole document ΓΊ Further documents are listed in the continuation of Box C . * Special categories of cited documents: Ά" document defining the general state of the art which is not considered to be of particular relevance Έ" earlier application or patent but published on or after the international filing date 'L" document which may throw doubts on priority claim (S) or which is cited to establish the publication date of another citation or other special reason (as specified) Ό" document referring to an oral disclosure, use, exhibition or other means 'P" document published prior to the international filing date but later than the priority date claimed Date of the actual completion of the international search 26 Jun. 2013 (26.06.2013) Name and mailing address of the ISA/CN The State Intellectual Property Office, the P.R.China 6 Xitucheng Rd., Jimen Bridge, Haidian District, Beijing, China 100088 facsimile No. 86-10-62019451 Form PCT/ISA /210 (second sheet) (July 2009) See patent family annex. "T" "X" later document published after the international filing date or priority date and not in conflict with the application but cited to understand the principle or theory underlying the invention document of particular relevance; the claimed invention cannot be considered novel or cannot be considered to involve an inventive step when the document is taken alone "Y" document of particular relevance; the claimed invention cannot be considered to involve an inventive step when the document is combined with one or more other such documents, such combination being obvious to a person skilled in the art " & "document member of the same patent family Date of mailing of the international search report 18 Jul. 2013 (18.07.2013) Authorized officer WANQ Ning Telephone No. (86-10 )62414033 INTERNATIONAL SEARCH REPORT International application No. Information on patent family members PCT/IB2013/051338 Patent Documents referred in the Report US 201 1/0131362 A l US 2004/0103220 A l US 7436845 B l Publication Date 02.06.2011 27.05.2004 14. 10.2008 Form PCT/ISA /210 (patent family annex) (July 2009) Patent Family Publication Date WO 2010/117524 A2 14. 10.2010 CN 101873339 A 27. 10.2010 DE 112010001469 T5 16.05.2012 US 2010/0246594 A l 30.09.2010 US 201 1/0080920 A l 07.04.2011 US 201 1/0131456 A l 02.06.2011 CN 102326362 A 18.01 .2012 WO 2004/038699 A2 06.05.2004 EP 1563397 A2 17.08.2005 P 20065041 87 A 02.02.2006 P 2010182313 A 19.08.2010 P 201 1018343 A 27.01 .2011 None