And the problem was....   Turns out the interface(IP) we used on the NS480 had been used for NDMP. A bit odd to me that this was the cause. And that the behavior was reproduced without any NDMP backups running.  We created a new interface on the NS480 and the rest worked fine.  Thanks for the replies!!  Caroline
We have a new VNX and are trying to migrate the data from our current NS480 over to it.   I started with this guide  [URL]  The steps failed at data mover interconnect. Reading other discussions, several people recommended the command line versus the replication wizard.   Although I have got a little more with the CLI it's still failing at the data mover interconnect.   The following just sits at 1% progress $ nas_replicate -create NS480VNX -source -vdm vdm1 -destination -vdm vdm1 -interconnect NS480-VNX -max_time_out_of_sync 10  $ nas_task -i 6761780 Task Id                = 6761780 Celerra Network Server = NS480-NN-Control Task State             = Running Current Activity       = Info 26045317578: Creating checkpoints for Create task Movers                 = server_2 Percent Complete       = 1 Description            = Create Replication NS480VNX. Start Time             = Sun Nov 24 22:17:12 EST 2013 Estimated End Time     = Tue Jan 07 09:38:52 EST 2014 Schedule               = n/a  I maybe missing something simple which needed to be done with the new VNX... Any input would be appreciated!  Thanks  Caroline
NS480 VNX data replication