This configuration will not work, the reason is that you need to have all the Source volumes in on DSS server and the Destination volumes on the other server. You can have 2 VIP's but you will need additional NIC's.
Sorry to delete your last post but I do not allow Open-E engineer names and responses to be posted on the forum.
The engineer did respond correctly in that if you use the Manual Failover it will work but not with the Auto Failover. From the diagram that you have you will not be able to have the Auto Failover with Source Logical Volumes on both servers. You can test this and you find out that it will not work but with the manual failover it will.
Just so you know, we have a customer doing this sort of "cross-replication" thing that you describe (but manually, not auto-failover), but we're going to change it to auto-failover, so we're going to have to go to a regular setup with one server only having destination volumes and the other only having source volumes.