Hello

AFAIK, I think you do not want to do that.

First: You need to load the kernel from the swap, in the time it loads,
you have no running kernel (well, there is a little part, but that one
has no clue about network).

Second: You do not want swap on nfs, since it is terribly slow, buggy,
nfs can allocate memory to transfer data and you get a circular problem
- to get a memory, you need to get a memory. And, what if your cat steps
on the ethernet cable?

Third: the suspend does not use swap as a swap, but as a part of a disc.

You might try suspend to ram, thought. It should work on diskless
machine as well as on any other.

-- 
When all else fails, EAT!!!

Michal 'vorner' Vaner