The failover protocol provides a lot of control over the brokers to which a client can connect. Using dynamic failover adds some ability to make the broker list more transparent. However, it has weaknesses. It requires that you know the address of at least one broker and that an initial broker is active when the client starts up. Using dynamic failover also requires that all of the brokers being used for failover are configured in a network of brokers.
Fuse MQ Enterprise's discovery protocol offers an alternative method for dynamically generating a list of brokers that are available for client failover. The protocol allows brokers to advertise their availability and for clients to dynamically discover them. This is accomplished using two pieces:
discovery URI—looks up all of the discoverable brokers and presents them as a list of actual URIs for use by the client or network connector
discovery agents—components that advertise the list of available brokers
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