Troubleshooting fiber connection problems

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  • Updated 11 months ago
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  • (Edited)
Hi...
i have problem with extreme switch how to troubleshoot if fiber optic is not working
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George

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Posted 11 months ago

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ar

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Hi,
is it an EXOS or EOS (Enterasys) switch?
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George

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exos
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Bin, Employee

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Hello George,
Are you looking for UDLD (Unidirectional Link Fault Management)? UDLD can help to detect unidirectional links due to one-way traffic on fiber-optic or misconnected ports on fiber-optic links.

http://documentation.extremenetworks.com/exos_22.3/exos_21_1/oam/c_unidirectional-link-fault-managem...

Best regards,
Bin
(Edited)
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EtherMAN, Embassador

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You could also look at light levels on both sides on the link you are trying to get up if you are using a current switch with optics that support this... You need to also look at duplex settings if it is a sfp+ port.

Command is 
show port # transceiver info detail 

example  

PLW_X430_WWaterTP_Homestead.1 # sh02 port 25 transceiver info detail


Port :  25

    Media Type            : ZX_1550 (Industrial Temperature)
    Vendor Name           : SOURCEPHOTONICS
    Part Number           : SPGBZXIDFBEX
    Serial Number         : F2R2017123
    Wavelength            : 1550 nm

    Temp (Celsius)            :  42.53      Status               :  Normal
          Low Warn Threshold  : -40.00      High Warn Threshold  :  100.00
          Low Alarm Threshold : -45.00      High Alarm Threshold :  105.00

    Voltage AUX-1/Vcc (Volts) :  3.27       Status               :  Normal
          Low Warn Threshold  :  3.00       High Warn Threshold  :  3.60
          Low Alarm Threshold :  2.90       High Alarm Threshold :  3.70


    Tx Power (dBm)            :  2.23       Status               :  Normal
          Low Warn Threshold  :  0.00       High Warn Threshold  :  5.00
          Low Alarm Threshold : -1.00       High Alarm Threshold :  6.00

    Rx Power (dBm)            : -8.36       Status               :  Normal
          Low Warn Threshold  : -23.01      High Warn Threshold  : -3.00
          Low Alarm Threshold : -23.98      High Alarm Threshold : -2.00

    Tx Bias Current (mA):        10.53      Status               :  Normal
          Low Warn Threshold  :  0.20       High Warn Threshold  :  60.00
          Low Alarm Threshold :  0.10       High Alarm Threshold :  70.00