multicast

Overview The default discovery configuration ( multicast_receive_address ) uses the UDPv4 multicast address 239.255.0.1 . If Connext advertises multicast but runs on an environment without end-to-end multicast support, it can cause intermittent discovery, liveliness issues, and failed reliable-data ...
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Summary This article explains how to configure RTI Connext Professional so DomainParticipants discover each other using UDPv4-unicast or SHMEM only. Target outcome: No discovery multicast (discovery multicast receive disabled) Explicit unicast peers for discovery Optional hard disable of UDP ...
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Summary On Linux/Windows and potentially other operating systems, when a DataWriter sends data samples to a multicast address, the performance of the underlying UDP sendmsg() call varies depending on whether multicast DataReaders are located on the same local host. If there are no local, multicast ...
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When using the multicast_mapping QoS, you may encounter this error: NDDS_Transport_UDP_share_recvresource_rrEA:setsockopt(ADD_MEMBERSHIP) error 0X69 This error usually indicates that you've exhaused the kernel parameter called igmp_max_memberships on Linux-like operating systems. The default for ...
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By default, RTI Connext Micro will let the Network stack select the interface that will be used to receive multicast traffic. This is done by simply using INADDR_ANY (which translates to 0.0.0.0) when setting the socket option to join a multicast group (that is IP_ADD_MEMBERSHIP). While this works ...
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There are three steps to take to configure Connext Micro not to use multicast. Set disable_auto_interface_config to true. Micro will scan the system for available interfaces and use them. Note, however, when this is set to true, Micro relies on just the manually added interfaces. Add an interface ...
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Endpoint Discovery uses either unicast or multicast, depending on the situation. First, some background: Endpoint Discovery is the process used by endpoints (that is, DataReaders and DataWriters ) to locate each other before they can begin to communicate user data. When a DomainParticipant is ...
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Multicast over UDPv4 can be used for data transfer between applications that are running on the same machine, even if shared memory is enabled. RTI's Connext DDS provides various transports, which can be configured using the USER_QOS_PROFILES.xml file. The most commonly used transports are shared ...
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RTI Connext DDS uses multicast for the discovery process in the default setting. When a host needs to join a multicast group, the network stack of the host sends out an IGMP Membership Report message also known as the join message. These messages are forwarded through the LAN to the local IGMP ...
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In short, by default, one copy of a sample is sent per transport locator, where a transport locator uniquely identifies a transport-level destination and is composed of <transport class>://<transport address>: <communication port> . For example, for UDPv4 a transport locator could ...
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