Symbol errors

Unanswered Question
Sep 26th, 2008

Hi, does anyone know what Symbol error frames are?

Getting quite a few appear on the rx side of the show controllers output on failing sfp ports on a 3750-12G.

Any help or pointers much appreciated.


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mfreijser Fri, 09/26/2008 - 05:04

According to the "Troubleshooting Switch Port and Interface Problem"-Document from, the error is described as follows:

"A Symbol error means the interface detects an undefined (invalid) Symbol received. Small amounts of symbol errors can be ignored. Large amounts of symbol errors can indicate a bad device, cable, or hardware."

You can find the document here:

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