Network of brokers as a cluster

Hi,

can a network of 2 brokers be used to form a cluster? or I need to use
Master/slave or other option.
The need is for clustering and that a consumer can disconnect and connect
again to the second broker and to receive messages that were sent while it
was down.
can messages pass to both of the brokers even all consumer are disconnected
(in a virtual topic)
thanks.