|In order to make sure whether it's incorrect switch configuration, switch port problem or PC problem, advise you to connect that "bad" PC to Verizon router and see whether it can be reached from other PCs. |
The other approach, you can connect that "bad PC" to the other Cisco switch ports, and test again. You can even connect the "bad PC" to the Cisco switch port which is connected by the other working PC, and test again.
Hope this helps.
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