Deploying a topology informs each broker in the domain of the brokers with which it can share publications and subscriptions. Topology deployment is required only when using publish/subscribe.
Whichever of these types of deployment you perform, the Configuration Manager attempts to subscribe to the broker's status messages if it is the first deployment to the broker. However, only a complete topology deployment initiates a further subscription.
Deploying a complete topology has the following effects:
Deploying a delta topology sends updated publish/subscribe network information to any broker with a publish/subscribe configuration that the Configuration Manager determines not to be current.