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Router sends large first fragment, then smaller second frag

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Article ID: KB7348 KB Last Updated: 23 Aug 2010Version: 4.0
Summary:
Router sends large first fragment, then smaller second frag
Symptoms:
Environment:
  • GPRS networking
Symptoms & Errors:
  • Router sends large first fragment
  • Application sends large first fragment, then smaller second one
  • Packet being dropped due to order of fragmentation
  • Performance problems

Solution:
Modify the size of the smaller fragment packet. From the command line interface (CLI):

set flow max-frag-pkt-size <maximum packet size of smallest fragment>

Choose a large enough value so fragmentation will not occur.  Start with 1024, and see how the performance is, and modify this value until the right baseline performance is achieved.


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