There will also be inter-broker replication traffic, and controller communications (the controller runs on an elected broker in the cluster). If you're using security features in Kafka 0.9, you may see additional auth traffic between brokers.
That's all I can think of off the top of my head. On Wed, Apr 27, 2016 at 9:46 AM, Christoph Grotz <christophgr...@gmail.com> wrote: > Hi, > > we are thinking about setting up a Kafka cluster. I understand that the > Kafka nodes need to communicate with the Zookeeper cluster in port 2181. Is > there communication between the broker nodes? > > Thanks, > Christoph
