Unable to reload or upgrade firmware on a controller.

Issue

Controller drops offline when reloaded or when an attempt to flash firmware is made.

Product Line

Andover Continuum

Environment

  • Infinet
  • MSTP

Cause

Massive CRC errors on the MSTP bus due to a bad controller on one leg of blink.

Resolution

  • In this case the problem was due to a bad controller on the bus. 
  • The offending controller was located by segmenting the bus to determine which legs were introducing this problem.
  • Once it was determined which controller was causing this issue, the controller was removed and a replacement installed.