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Cisco command to check for packet loss / errors?

Posted on 2014-12-11
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Last Modified: 2014-12-11
Hi, one of our networks is used for a bespoke application which is underperforming and we have been advised that the network has issues.
I can run a continuous ping to any device on that network with a -l 1500 and I don't drop any packets.
I would like to be able to run a command on our Cisco 2960 and 3560 switches that will show if there are lots of errors / data loss etc that I can copy and paste to a word doc.
please can you advise command to run and also what values you would consider to be unacceptable.
kind regards,
Rick
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Question by:Rick_Penney
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4 Comments
 
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Expert Comment

by:Don Johnston
ID: 40493472
"show interface "

Bottom 10 lines or so gives you information on bad packets, etc.
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Author Comment

by:Rick_Penney
ID: 40493477
Many thanks for that, is there anyway I can increase the duration to get more than the 5 minute input and output that it displays?
regards
Rick
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Accepted Solution

by:
Don Johnston earned 2000 total points
ID: 40493502
In interface config mode use the "load interval (seconds)" command.  But that will just affect the rate calculations.

I would "clear counters" on the interface and then monitor for errors.
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Author Closing Comment

by:Rick_Penney
ID: 40493514
Thank you very much, its much appreciated.
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