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  1. #1
    Join Date
    Jul 2002
    Location
    Phlippines
    Posts
    4

    Unanswered: SDU/TDU values for MTU=1500 in TCP/IP

    We are using an MTU = 1500, tcp/ip. We did not specify sdu/tdu in the tnsnames.ora and listener.ora. I beleave that this will cause network fragmentation as SDU is defaulting to 2048. What is the best value that I can set for SDU/TDU? How can I monitor if the fragmentation has been eliminated once we correct the value of sdu/tdu?

  2. #2
    Join Date
    Jul 2002
    Location
    Sydney,Australia
    Posts
    44
    Have a read of this document

    It was related to ORA-12151 and ORA-12571 errors on Windows NT.

    Before changing anything use netstat (on either Windows or Unix)
    to see what the stats are for fragmentation.

    Basically the recommendation is to make the client and listener the same as the network topology
    so if you are using Ethernet with mods MTU = 1500.

    Hope this helps
    Attached Files Attached Files
    An Oracle DBAs undocumented init.ora parameters
    _OVERCOME_POOR_DESIGN = TRUE
    _DISABLE_BAD_PERFORMANCE = TRUE

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