Symbol errors

[rmcarthur]

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.

Thanks

[mfreijser]

According to the "Troubleshooting Switch Port and Interface Problem"-Document from Cisco.com, 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:

http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a008015bfd6.shtml

Please rate if the post helps!

Regards,

Michael