The VNXe uses a similar replication technology to the VNX for WAN replication.  No, it's not rsync.  You'll need to look at a WAN acceleration solution that supports Celerra/VNX IP Replicator.  Companies like Riverbed will be the focus of your research, as they're probably the most commonly-used products with Celerra Replicator.  Let us know if that helps!  Karl
We are currently examining adding WAN Acceleration devices between our two remote VNXe3100s.  Currently the VNXe3100s replicate CIFS shares locally, and we have an average of 200GB of changed data daily!  Current buisness needs require us to have our replicas in a remote colocation facility, thus we are looking at WAN Acceleration solutions.  My question regarding the VNXe replication sessions, are these basicly just RSYNC over SSH?  What type of protocols are used, as I would like to select a WAN optimizer which handles these protocols to get our best solution.
VNXe Replication Sessions