Thanks
This is a 2254, so connectivity is limited, the LIFs etc are the ones the installation wizard creates.
I think I can find away to do it by temporarily designating an unused 10GB port on each head as a node management one, deleting the e0M lifs and create new ones in the right subnet.
Really this post is about NetApp inability to offer a solution to what can't be that unusual a question. Last time I had a similar one they ended up recommending to wipe the filer and start again, Which I did as there wasn't really any other set-up it.
Crux of the matter is CDot may be a great product, but it may be so complex now that NetApp's staff can't really support properly.