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CN1610 ISL Link Flapping using Optical Cables

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Category:
fabric-interconnect-and-management-switches
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HW
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Applies to

  • CN1610
  • Optical Cables on ISL connections

Issue

  • ISL link repeatedly flapping on both switches:

<14> Dec 14 19:28:26 switch-1 DOT3AD[dot3ad_core_lac]: dot3ad_db.c(899) 117853 %% Interface 0/13 attached to ISL-LAG.
<13> Dec 14 19:28:26 switch-1 TRAPMGR[trapTask]: traputil.c(735) 117852 %% Link Up: 0/13
<14> Dec 14 19:28:26 switch-1 DOT3AD[dot3ad_core_lac]: dot3ad_db.c(962) 117851 %% Interface 0/13 detached from ISL-LAG.
<13> Dec 14 19:28:26 switch-1 TRAPMGR[trapTask]: traputil.c(735) 117850 %% Link Down: 0/13
<14> Dec 14 17:20:52 switch-1 DOT3AD[dot3ad_core_lac]: dot3ad_db.c(899) 117849 %% Interface 0/13 attached to ISL-LAG.
<13> Dec 14 17:20:52 switch-1 TRAPMGR[trapTask]: traputil.c(735) 117848 %% Link Up: 0/13
<14> Dec 14 17:20:51 switch-1 DOT3AD[dot3ad_core_lac]: dot3ad_db.c(962) 117847 %% Interface 0/13 detached from ISL-LAG.
<13> Dec 14 17:20:51 switch-1 TRAPMGR[trapTask]: traputil.c(735) 117846 %% Link Down: 0/13

  • Switch logs show SFPs on ISL ports 0/13-0/16:
SFP Module Hardware Data:


                         Link Link                                 Nominal
                       Length Length                                   Bit
                         50um 62.5um                                  Rate
Port     Vendor Name      [m] [m]  Serial Number    Part Number     [Mbps] Rev  Compliance
-------- ---------------- --- ---- ---------------- ---------------- ----- ---- ----------------
0/1      AVAGO            8   3    XXXXXXXXXXX      AFBR-709SMZ-NA3  10300 G4.1 10GBase-SR
0/2      AVAGO            8   3    XXXXXXXXXXX      AFBR-709SMZ-NA3  10300 G4.1 10GBase-SR
0/3      AVAGO            8   3    XXXXXXXXXXX      AFBR-703SMZ-NA4  10300 G2.3 10GBase-SR
0/4      AVAGO            8   3    XXXXXXXXXXX      AFBR-709SMZ-NA2  10300 G4.1 10GBase-SR
0/13     CISCO-FINISAR    8   2    XXXXXXXXXXX      FTLX8571D3BCL-C2 10300 A    10GBase-SR
0/14     CISCO-FINISAR    8   2    XXXXXXXXXXX      FTLX8571D3BCL-C2 10300 A    10GBase-SR
0/15     CISCO-AVAGO      8   2    XXXXXXXXXXX      SFBR-709SMZ-CS2  10300 G4.1 10GBase-SR
0/16     CISCO-AVAGO      8   2    XXXXXXXXXXX      SFBR-709SMZ-CS2  10300 G4.1 10GBase-SR

 

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