Using EV USL failover from clustered prod server to clustered DR server

Hi,

Customer needs to have a clustered EV server in their production site due to high uptime requirement.  They are also looking at setting up a clustered EV server in their DR site as well.

Can USL be used to failover a clustered EV server into another clustered EV server?  My guess is this should work.  Wanted to check if anyone had done this and if any concerns.

Thanks,