What's the compatibility of X-Pack versions?
I want to split my X-Pack Basic monitoring from my production ES 5.4.x Cluster. If I spin up a dedicated X-Pack Monitoring Cluster as version ES 5.6.
- Can the ES 5.4 Cluster send to X-Pack Monitoring Cluster as ES 5.6?
- Can a send other ES Clusters (Dev, QA) to same X-Pack Monitoring Cluster as ES 5.6?
Thanks in advance. 
Cheers,
Rich