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How to find the correct port number of the Black Diamond switch while monitoring CRC errors.

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TitleHow to find the correct port number of the Black Diamond switch while monitoring CRC errors.
Objective
How to find the correct port number of the Black Diamond switch while monitoring CRC errors?
Environment
  • Black Diamond
  • All Exos versions
Procedure
Please find below calculation by which the switch will calculate the port numbers,
 
The exact OID formula is:  
 (slot # - 1) *256 + ( port # - 1 ) * 2 + 1 – rxerrors
 (slot # - 1) *256 + ( port # - 1 ) * 2 + 2 – txerrors
 
Example: If you want to get the information of the CRC errors of the port 2:1 (i.e port 1 of slot 2 Black Diamond’s switch),
Slot number is 2 and port number is 1
(2-1) * 256 + (1-1) * 2 + 1 = 257 for rxerrors
(2-1) * 256 + (1-1) * 2 + 2 = 258 for txerrors

So, the OID to get the Rx CRC of the port 2:1 is 1.3.6.1.4.1.1916.1.11.1.1.3.257 
And the OID to get the Tx CRC of the port 2:1 is 1.3.6.1.4.1.1916.1.11.1.1.3.258 


 
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