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Network issue: what is the significance of router or switch interface discards compared to errors?

Posted on 2011-03-17
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When looking at interface statistics, what is the significance of router or switch interface discards compared to interface errors?  Are they related?  Does the packet discard count imply that many  retransmissions
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Question by:hassarfj
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by:Piloute
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H,

Your question seems incomplete...

In any case :

discard = ignore on purpose
error = well, this is an error....

Cheers,
P
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They are not related. Interface errors are typically related to the physical layer issues whereas discards are typically related to congestion on the link. If running a protocol such as tcp and you encounter output discards, tcp will have to retransmit the dropped packet. Additionally, depending on how severe the errors were at the interface, tcp retransmissions can occur.
Billy
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