At the moment when a backup fires off, vCenter snapshots at the VM level, but this periodically causes the VM to stutter for a couple of seconds (i.e. longer pings, occasionally lost packet, which is not good for a webserver

The problem is we use 2 different types of array, an EqualLogic, configuring this is to do the snapshotting is easy enough and well documented (By using the Host Integration Tools). But what I can't find is anything on how to do this with an EMC VNX5300. I've contact EMC and to be honest, their reply was useless, they suggest using SNAPCLI, which I don't think is quite what we are looking for.
Does anybody have an EMC VNX or Celerra and use hardware level snapshots, if so how did you get it working?
Thanks