Support Support Downloads Knowledge Base Juniper Support Portal Community

Knowledge Base

Search our Knowledge Base sites to find answers to your questions.

Ask All Knowledge Base Sites All Knowledge Base Sites JunosE Defect (KA)Knowledge BaseSecurity AdvisoriesTechnical BulletinsTechnotes Sign in to display secure content and recently viewed articles

[ScreenOS]Troubleshooting Ethernet and Fragmentation Issues



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

Troubleshooting Ethernet and Fragmentation Issues



  • 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

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.
Comment on this article > Affected Products Browse the Knowledge Base for more articles related to these product categories. Select a category to begin.

Getting Up and Running with Junos

Getting Up and Running with Junos Security Alerts and Vulnerabilities Product Alerts and Software Release Notices Problem Report (PR) Search Tool EOL Notices and Bulletins JTAC User Guide Customer Care User Guide Pathfinder SRX High Availability Configurator SRX VPN Configurator Training Courses and Videos End User Licence Agreement Global Search