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queue drops, errors, and discards

Is there any standard or convention for when a device reports a queue drop or an error also as a discard?

I have seen cases where the count of output queue drops reported on an interface matches the number recorded in output discards. However, when I get input queue drops, I see zero for input discards. I have also seen cases when input error count and input discard count match. 

If queue drops that are also discards means something different than queue drops that are not discards, I can not find that in searching documentation.

Likewise if some errors are also discards and some other errors are not discards, it would be helpful to know the difference.

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Cisco Employee

queue drops, errors, and discards

Here is a good reference link for all port counters:

http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015bfd6.shtml

Which switch specifically are you looking at?

Are you using the show count int x/y?

Fabienne

TAC

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