When Serially consoling into a Cisco Switch I got the following grey blocks 

I’ve tried the following things:

• New laptop
• Baud Rates
• Encoding
• New cable
• New adapter
• Tera Term instead of putty
• Verified the cable works with another switch

Fix

Use a laptop with a Serial Port built in or Docking station as it seems to be a USB driver issue

 

Tags: Cisco UCS FI 6324, console, grey blocks, putty, rectangles, serial, spaces, tera term, usb to serial

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