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June 11th, 2024 14:59

Discarding packets inbound interfaces

Hi,

We have on a customer some switchs Dell S3124F-01-FE-28 (version  9.13(0.3).

It's connected with Cisco switchs where I see outbound drop. But on the dell Switchs, I don't see discarded packets on output interface but in the input interfaces:

Input Statistics:
     4955893560 packets, 1528884308828 bytes
     29059239 64-byte pkts, 1076786163 over 64-byte pkts, 3014383742 over 127-byte pkts
     206346592 over 255-byte pkts, 170512781 over 511-byte pkts, 458805043 over 1023-byte pkts
     28532383 Multicasts, 3109722 Broadcasts, 4922544568 Unicasts
     0 runts, 0 giants, 0 throttles
     0 CRC, 0 overrun, 4785007 discarded
Output Statistics:
     5467593842 packets, 2447333857794 bytes, 0 underruns
     259952729 64-byte pkts, 472844183 over 64-byte pkts, 2851103192 over 127-byte pkts
     498084103 over 255-byte pkts, 330750139 over 511-byte pkts, 1054859496 over 1023-byte pkts
     2899752 Multicasts, 1634018 Broadcasts, 5463060072 Unicasts
     0 throttles, 0 discarded, 0 collisions, 0 wreddrops

How it's possible? I don't find a solution to identify why the switch drops some packets. What is the reason?

Thanks for your help

Moderator

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3.5K Posts

June 12th, 2024 15:41

Hello,

 

You are correct. If you upgrade to the latest 9.14.x.x release, you would not have the problem.

 

S3100 Series Downloads

I see v9.14.2.23 is available:

https://dell.to/4elqJBn

Moderator

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3.5K Posts

June 11th, 2024 20:14

Hello,

 

Changes to the discard counter under show interfaces output have been implemented to be compliant with RFC 2233. The change is applicable only for certain versions and 9.13.0.3 falls withing this range. The behavior was changed after 9.14.0.0, where the Discard counter under show interfaces input statistics will not count symbol errors/CRCs/runts/giants/overruns/underruns, because there are separate counters for these errors.

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June 12th, 2024 15:29

Thanks for your answer. So, I need to upgrade the switch to a version 9.14.X.X minimum to have the different counters in the show interface? Currently, all the counters errors/CRCs/runts/giants/overruns/underrun go in input discarding packets ?

Thanks

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