Gluster users - Jan 2018 - fail-over network for nodes

What is the best way to make cluster switch to the different
route/network if primary network is down.

Lets say there is a separate Gluster network for data exchange, but if
it is not available, cluster should utilize the production network,
until resolved. Separate interfaces for different networks, 4 servers.

Initial mount is via name vm1..4 from hosts file

Thanks!