Cisco WS-C2940-8TT-S User Manual (English)

Questions and Answers:

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bjacksonJul 30, 2025
How to troubleshoot no connectivity to 10/100 ports on Cisco WS-C2940-8TT-S?
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  Heather PetersJul 30, 2025
  If there is no connectivity to the 10/100 ports or 10/100/1000 port on your Cisco Switch, the problem might be an incorrect or faulty cable. Here’s what you can do: * Remove and reconnect the cable to both the switch and your PC. Allow 30 seconds for the port status LED on the switch to turn green. * Check the cable wiring to ensure it’s correct. * If you suspect the cable is the issue, replace it with a known good cable and again wait 30 seconds.
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Charles BallardAug 3, 2025
What to do if Cisco WS-C2940-8TT-S Switch is error-disabled after inserting SFP module?
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  uadamsAug 4, 2025
  If your Cisco Switch enters an error-disabled state after inserting an SFP module, it's likely due to a bad or non-Cisco-approved SFP module. To resolve this, remove the current SFP module and replace it with a Cisco-approved module. To verify the port status, use the `errdisable recovery cause gbic-invalid` global configuration command and set a time interval to recover from the error-disable state.
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melissaleeAug 8, 2025
Why is there no connectivity to SFP module on Cisco WS-C2940-8TT-S Switch?
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  samuel94Aug 9, 2025
  If you're experiencing no connectivity to an SFP module on your Cisco Switch, it could be due to a couple of reasons: * The SFP module was installed after the switch was powered on. * A 100BASE-FX device is connected to the switch. To fix this: * Remove and reinstall the SFP module, then reboot the switch. * If a 100BASE-FX device is connected, disconnect it, reinstall the SFP module, and then reboot the switch.
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kellyjasonAug 14, 2025
How to fix no connectivity to 100BASE-FX port on Cisco Switch?
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  mark21Aug 14, 2025
  If there is no connectivity to the 100BASE-FX port on your Cisco switch, it might be because an SFP module was installed in the switch at power on. To solve this, remove the SFP module and reboot the switch.
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smithjohnAug 25, 2025
What to do if system LED is amber and all port LEDs are off on Cisco Switch?
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  Kenneth LeonardAug 25, 2025
  If the System LED on your Cisco switch is amber and all port LEDs are off, it indicates corrupted software. To address this, attach a monitor to the serial port to view the switch boot loader.
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lynnreginaSep 10, 2025
What does it mean when system LED is amber on Cisco WS-C2940-8TT-S Switch?
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  michael58Sep 12, 2025
  If the system LED on your Cisco switch is amber, it indicates a nonfatal or fatal POST error has been detected. To identify the specific failure, use the `show post` privileged EXEC command. If your switch fails the POST, contact your Cisco representative, as these failures are usually fatal.