Getting Started - (DDS) Community RTI Connext Users

6. Practical UsesChapter 6Practical Uses with RTI ApplicationsThis chapter offers a few suggestions on how Wireshark can be used during RTI DataDistribution Service application development:❏ Debugging Discovery Problems (Section 6.1)❏ Visualizing Your System (Section 6.2)❏ Providing Information to RTI Support (Section 6.3)6.1 Debugging Discovery ProblemsWhile many object discovery problems are difficult to diagnose, others are quite obviousonce you use the right diagnostic tools. By inspecting all RTPS packets with Wireshark,you may be able to narrow the problem down to one of the following:❏ The participants are not discovering each other. In this case, you will see periodicsending of DATA packets, but no response from the other host that is not beingdiscovered.❏ The participants have discovered each other, but their contained readers/writersare not getting hooked up correctly. In this case, you may see HEARTBEAT andACKNACK packets for the reserved meta-data representing the reader andwriter from one participant to another, but the other participant is not respondingback in accordance to the RTPS protocol.❏ The objects have all discovered each other, but the writer is not sending userdata.In this case, you will see the discovery protocol complete successfully, butnot see DATA packets containing user data from the writer.6-1