Correct - after that command finishes, your target cluster (according to the specified policy) is writable.  You are then free to point clients to it as you see fit.  You should have a conversation with your EMC SE about this process.  He/she can help you with it.
Hi,  I've got 2 Isilon clusters and need to work out how to failover to the DR cluster should I need to, before I actually have to!  I've got SyncIQ configured already and that seems to be working ok.   Is there any documentation to support this?  Thanks
Failing over to Isilon DR cluster