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Troubleshooting

This section offers hints and pointers to help users with navigating through the documentation while troubleshooting issues.

  • Although UDP/SHM default transports of Fast DDS are designed to work in most network environments, they may encounter certain limitations when operating over WiFi or within lossy network conditions. In these cases, it is advisable to set up the LARGE_DATA configuration, which has been specifically optimized for these scenarios. The LARGE_DATA profile limits the use of UDP solely to the PDP discovery<disc_phases> phase, employing the more reliable TCP/SHM for the remainder of the communication process. Its implementation can be accomplished by simply configuring the FASTDDS_BUILTIN_TRANSPORTS environment variable, or alternatively through XML profiles or via code. For more information, please refer to use-case-tcp-multicast.

    Environment Variable

    export FASTDDS_BUILTIN_TRANSPORTS=LARGE_DATA

    XML

    /../code/XMLTester.xml

    C++

    ../../../code/DDSCodeTester.cpp

  • Problems with transmitting large samples such as video or point clouds? Please refer to use-case-largeData.