View Replication Option is disabled

Hello there,
I’m using couchbase 4.1 CE, my question is when a gracefull failover happens, my view are replicated to the other machine, so queries can continue to work? Is this correct?
This takes forever, if i activate view replication, this won’t happen, because the view will already have a replica, write?

How can i activate view replication on the bucket? the option is disabled.