ExtremeSwitching (EXOS)

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• X670G2-48x-4q Created by ExtremeXOS version 15.6.4.2
• Port Temp TxPower RxPower TxBiasCurrent Voltage-Aux1/ Voltage-Aux2 (Celsius) (dBm) (dBm) (mA) Vcc (Volts) (Volts) ================================================================================ 1 28.96 -2.06 -8.27 30.30 3.24 N/A ================================================================================ N/A - parameter not applicable to transceiver connected to the port * - value is out of normal range
• 01/30/2018 10:54:55.12 [i] Port 1 link UP at speed 10 Gbps and full-duplex 01/30/2018 10:54:53.64 [i] Port 1 link down - Local fault 01/30/2018 10:54:52.59 [i] Port 1 link UP at speed 10 Gbps and full-duplex 01/30/2018 10:54:50.77 [i] Port 1 link down - Local fault

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• X440-24t-10G Created by ExtremeXOS version 15.7.1.4
• Port Temp TxPower RxPower TxBiasCurrent Voltage-Aux1/ Voltage-Aux2 (Celsius) (dBm) (dBm) (mA) Vcc (Volts) (Volts) ================================================================================ 26 35.84 -1.56 -5.57 36.75 3.19 N/A ================================================================================ N/A - parameter not applicable to transceiver connected to the port * - value is out of normal range
• 01/30/2018 10:54:53.93 [i] Port 26 link UP at speed 10 Gbps and full-duplex 01/30/2018 10:54:53.84 [i] Port 26 link down - remote fault 01/30/2018 10:54:47.49 [i] Port 26 link UP at speed 10 Gbps and full-duplex 01/30/2018 10:54:47.42 [i] Port 26 link down - remote fault

Is there any other information which I can help use to troubleshoot this issue? It started 1/26/2018 about 6 hours after a power event (01/20/2018 08:07:49.55

I would question why you have almost a 3 db difference in light levels on such a short run... Was that extra loss there before the port flaps? If not then you may have a bend in a splice case somewhere or a patch problem... maybe it not seated in frame on back side ... As a rule we try to keep under 2 db difference in fiber loss on ten gig links. Longer links we are more flexible but a short link the fibers should have very close to the same loss...

The link is approx 4 miles and the customer has moved our gear. They are using a multi mode patch cable on the single mode link. While this is wrong and being corrected today, the link was working over it until recently.

Hi Joe,

Please check these articles

1.
link down - Local Fault

2.
EXOS Local Fault Issue with Direct-Attach Cables

If none of these articles could not help you, I suggest you to open case to our GTAC
https://gtacknowledge.extremenetworks.com/articles/How_To/Create-a-Case-via-New-Portal

Best regards,