[Pacemaker] Low cost stonith device

[Mario Giammarco]

Hello,

Can you suggest me a list of stonith devices compatible with 
pacemaker?

I need a low cost one.

I have also another idea to build a low cost stonith device:

I have intelligent switches. To stonith a node I can send to
 a switch the command 
to turn off all ethernet ports linked to the node to be fenced. 

So the node is powered on but it cannot do any harm because 
it is disconnected 
from network.

Is it a good idea? How can I implement it?

Thanks in advance for any help.

Mario