Discovery

What are "heartbearts" and how are they used in RTI Data Distribution Service 3.x?

Note : The following discussion applies to RTI Data Distribution Service 3.x only. (There is a separate FAQ for 4.x.) Heartbeats (HBs) are sent for one of two reasons: Every SendQueueSize / HeartBeatsPerSendQueue issues, RTI Data Distribution Service will append a HB to the issue to request that it ...
Juanjo Martin
Thu, 01/17/2013 - 08:44
3551 reads — 0 comments

What are "heartbeats" and how are they used in RTI Connext 4.x and above?

Note : Applies to RTI Connext 4.x and above. There is a separate FAQ for 3.x. RTI Connext supports various transports to deliver data samples. Not all of these transports guarantee that all samples are delivered. For example, when using UDP, samples can be lost or can arrive out of order. The OMG ...
Juanjo Martin
Thu, 01/17/2013 - 08:25
7865 reads — 0 comments

How do I limit NIC usage for multicast in NDDS 3.1a?

Note: Applies to NDDS 3.x For machines with multiple NICs, it is sometimes useful to specify which NIC(s) to communicate over. Multicast packets will be sent through all interfaces that satisfy the following criteria: It is enabled for multicast NDDS is configured to use it Enabling a NIC for ...
sara
Thu, 01/17/2013 - 08:17
4079 reads — 0 comments

Do I need to set the max. participant index in the peers list?

Note: Relevant RTI Connext versions: RTI Connext 4.x and above. The Maximum Participant Index is an optional value at the beginning of a Peer Descriptor. It is used to specify a range of ports where RTI Connext will look for other participants during the discovery process. It tells RTI Connext how ...
aida
Thu, 01/17/2013 - 07:57
6346 reads — 0 comments

Does RTI Connext use IGMP messages?

Note: Applies to NDDS 3.x, RTI Connext 4.x and above Yes, RTI Connext will cause IGMP messages to be sent, allowing routers to appropriately handle multicast traffic delivery. The RTI code does not send the IGMP messages itself, but the host's network stack should send them when needed. When RTI ...
sara
Thu, 01/17/2013 - 07:27
5771 reads — 0 comments

Why do I get an error when I run an application on a Windows machine that is not connected to a network?

Note: Applies to NDDS 3.x, RTI Connext 4.x and above. You can run a publisher and subscriber on the same node or on different nodes. However, even if you are only using one node, by default, RTI Connext looks for a network connection. The default discovery behavior is to look for peers using ...
Victor
Thu, 01/17/2013 - 06:38
3625 reads — 0 comments

Why doesn't RTI Connext support Broadcast?

Note: Applies to NDDS 3.x, RTI Connext 4.x and above. There are several drawbacks to using broadcast. There is a performance degradation problem when using broadcast. It disrupts EVERY node in the system-even the ones that do not want ANY data! Such a system is clearly not scalable. With broadcast ...
Juanjo Martin
Thu, 01/17/2013 - 06:35
3703 reads — 0 comments

How can I detect new DataWriters and DataReaders joining the domain?

Note: Applies to RTI Data Distribution Service 4.0x and higher. RTI Connext must discover and keep track of remote entities, such as new participants in the domain or new DataReaders of a particular topic in order to work. This information may also be important to the application itself, which may ...
Victor
Thu, 01/17/2013 - 06:18
8244 reads — 1 comment

What network port numbers does RTI Connext use?

Note: The ports used are different between RTI Connext 4.x and NDDS 3.x. RTI Connext The built-in UDP transport in RTI Connext 4.x and above uses port numbers that are based on the domain ID and participant ID. Because the RTPS spec changed, the mapping is different before and after Version 4.2 of ...
Fernando Garcia
Mon, 01/14/2013 - 08:30
43577 reads — 4 comments

What is the maximum number of participants per domain?

Applies to RTI Connext 4.x and above With default settings, the maximum number of domains and participants in the same machine is limited as follows: Versions 4.1e and lower: 100 domains (0 .. 99) and 58 participants (0 .. 57) per domain on the same machine when the domain ID is 0. Version 4.2e and ...
Fernando Garcia
Mon, 01/14/2013 - 02:07
28700 reads — 3 comments

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