(Yet another) DLINK question

Hi all,

Anyone know if its possible to disable the switching on the
the 4 wired ethernet ports on the DLINK DSL 600+
(or any simmilar ATMOS based router) ?

I would like to be able to do various network monitoring
tasks from a box connected to one of the ports, but as
it is switched, I can't.

I don't especially want to run dsniff if I can avoid it,
but at the moment, it looks like its either that, or
buy yet another wireless adapter (sob!)