For multi-node AMQP brokers, if the default broker configuration for channel_max is 0, then we would see that all downstream clients are located on the same broker node. This can result in highly uneven loading of the cluster nodes.

I propose a channel_max parameter that limits the number of downstream clients that can use the same upstream connection. This should ensure that multiple upstream connections are utilized, which should result in better distribution of downstream clients across the cluster nodes.