ElasticSearch Cluster installation

Can some body specify the cluster information.
I want my 3 node cluster.
each node should run in different mechins node-1 node-2 node-3

i tried this set up , but nodes are not getting recognized.
i am trying elastic search2.2.0.
Please help me on this.

Please show your elasticsearch.yml. Make sure you format it as code.

My guess is that you need to change the network.host setting or that you haven't set discovery.zen.ping.unicast.hosts.

Thank you Magnus,
I missed network.host setting. After i added the parameter in yml file, it started recognizing the nodes.