Hi Scott, thanks for your reply.
Yes, the vFilers are in separate ipspaces. Adding another port wouldn't really be a problem apart from the security aspect and you're correct, we're not allowed to do that. We can't have the vFilers directly on the management network which basically, as far as I can tell, means that I simply won't be able to do what I need to.
I've been banging my head against a wall (not literally) trying to think of a clever way round this but I can't. It just seems that the toolset won't work in a multi-tenant environment. I guess that's what vFilers are for though, so I shouldn't be surprised! It's just frustrating when you're trying to manage them all. I know a bad workman always blames his tools but SRM is a great tool and would do exactly what I need if it could only talk to the vFilers!
It would be great if you could initiate calls to the vFilers via vFiler0 but I don't believe that's possible.