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You are here: Home / TSHOOT / Module 3 / Troubleshooting Switches at Layers 1 and 2 Chapter Summary

Troubleshooting Switches at Layers 1 and 2 Chapter Summary

The following section is a summary of the major points you should be aware of in this chapter.

Troubleshooting at the Physical Layer

  1. If you have physical access to the switch, the LEDs can be a very useful troubleshooting tool
  2. Cisco switches have front panel LEDs that can be used to determine link and system status
  3. A link or port LED color other than green typically indicates some kind of failure
  4. However, a green link light does not always mean that the network cable is fully functional
  5. The . . .

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