Is there any other infromation other than "Port 1 link down - Local fault" available to troublshoot intermittant issue?


Switch 1 -
  • 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
Switch 2-
  • 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 Booting after System Failure.).

I have already swapped optics and will be heading 2 hours to the site to swap ports.

Any additional insight would REALLY be appreciated.

3 replies

Userlevel 6
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.
Userlevel 5
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,

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