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[ScreenOS]Troubleshooting Ethernet and Fragmentation Issues

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Article ID: KB5347 KB Last Updated: 17 Feb 2021Version: 7.0
Summary:

Troubleshooting Ethernet and Fragmentation Issues

Symptoms:

Environment:

  • Modifying MSS values
  • DF Bit Set
  • Path MTU Discovery configured

Symptoms & Errors:
  • Cannot pass traffic with packet size greater than 2048 bytes
  • Performance problems
  • Throughput is slow
  • Fragmentation issues
  • Network access is slow
Solution:

Read the following technical note for information on what to look for when experiencing network throughput problems due to fragmentation:  
Troubleshooting Ethernet/Fast Ethernet and Fragmentation Issues on a NetScreen Device
 
(Note - although the document was published awhile ago, it applies to the current ScreenOS version)

Modification History:
2021-02-07: â€‹article reviewed for accuracy; article is correct and complete.
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