Checksum Errors

Overview

The "Checksum Errors" diagnostic fails when Optigo Visual Networks detects Checksum errors for MSTP control messages on an MSTP Network. Checksum errors indicate malformed packets, and are almost always caused by physical wiring or hardware issues.

Why it fails

• Wiring Issues: Loose or damaged wiring, flipped polarity, improper termination, or other physical wiring issue.
  
  

• Failing Device(s): Overheating, old, internal electronic problems, etc.
  
  

• Power Fluctuations: The network may have too many master devices that hold onto the token longer because they have more to say.

Implications:

• Intermittent Communication: Dropped packets result in communication loss between devices on the network.

How to Fix it

Because checksum errors result in malformed (gibberish) packets, the source address in Optigo Visual Networks should not be used as an indicator for which device(s) on the network may have physical wiring issues. To narrow down the search for problematic devices, users should use the Lost Tokens Diagnostic.