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TIBCO Rendezvous® 8.8.0

# Routing Daemon Overview

Rendezvous daemons (`rvd`) deliver messages to programs on computers within a single network. Delivering messages beyond network boundaries requires an additional software component—Rendezvous routing daemons (`rvrd`).

Routing daemons efficiently connect Rendezvous programs on separate IP networks, so that messages flow between them as if on a single network. Communicating programs remain decoupled from internetwork addresses and other details.

The routing daemons forward Rendezvous messages between networks. When routing daemons are present, Rendezvous programs on one network can listen for subject names and receive messages from other networks transparently—neither the sending nor the receiving programs require any code changes. Administrators retain control over the subject names that can flow in or out of each network.

## Situations

Use the routing daemon in situations where one or more of these conditions apply:

| • | Participating networks lie in distant geographic areas.

| • | Participating networks lie in nearby geographic areas, but are not connected by multicast routing hardware.

| • | Participating networks are separated by a firewall.

| • | Messages must traverse expensive or slow WAN links.

## Subsumes Rendezvous Daemon

In addition to routing Rendezvous messages to and from other networks, a routing daemon process also serves its host computer as a Rendezvous daemon (`rvd`). It is not necessary to run a separate `rvd` on a computer that is already running an `rvrd` process.

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