Tribe node configuration

Hi,

I'm trying to setup a tribe node to talk to the two cluster I have. Here is the elasticsearh.yml

---------------------------------- Cluster -----------------------------------

Use a descriptive name for your cluster:

cluster.name: tribe ----what should this be?

------------------------------------ Node ------------------------------------

Use a descriptive name for the node:

node.name: node1
node.master: false
node.data: false

#------------------------------------- Tribe ---------------------------------------

tribe:
t1:
cluster.name: X
discovery.zen.ping.unicast.hosts: ["X1", "X2", "X3"]
discovery.zen.ping.multicast.enabled: false
t2:
cluster.name: Y
discovery.zen.ping.unicast.hosts: ["Y1", "Y2", "Y3"]
discovery.zen.ping.multicast.enabled: false

This configuration doesn't work. I get service unavailable in the kibana screen.
The documentation doesn't talk about all the configurations in the elasticsearch.yml

Any help would be appreciated!