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TIBCO Rendezvous® 8.7.0

# Retransmission

Within its local networks, a routing daemon is the source (that is, the sending daemon) of all the forwarded messages that it rebroadcasts. That routing daemon handles retransmission requests (for example, if a listening application in the local network misses a packet).

Retransmission and rvrd illustrates this concept:

Procedure

| 1. | An application in network A sends a message.

| 2. | Routing daemon A forwards the message to routing daemon B.

| 3. | Routing daemon B rebroadcasts the message on network B.

| 4. | A receiving application in network B misses a packet, and its `rvd` requests retransmission.

| 5. | If the packet is within the reliability window of routing daemon B, then it retransmits the packet.

Otherwise, it denies the retransmission request; it does not attempt to get a new copy of the message from routing daemon A.

Figure 72: Retransmission and rvrd

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