CN1610 ISL Link Flapping using Optical Cables
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