How to add a node to a cluster?

Elastic Stack Elasticsearch
1

i have a cluster configed as discovery.zen.ping.unicast.hosts:["127.0.0.1:9200"]

i want to add a node 192.168.2.11

i try to use _cluster/settings api to update discovery.zen.ping.unicast.hosts.

but it did not work.

any suggestion?

thanks all.

2

i change to use multicast.