There might be an issue.
For UDP traffic you have to configure a group to nat the server response back into the vip address.
If the servers are the same for both vip, on the way back to the client the CSS will not know which vip address to use - a server can only be in one group at a time.
A solution could be to do client nat. This might force the CSS to remember the vip address on the way back. Not sure as I did not try it.
Gilles.
