On Sun, May 3, 2009 at 12:46 PM, Nicolas de Pesloüan <nicolas.2p.debian@free.fr> wrote:

Ok, now we understand what you are trying to do. In particular, I assume
the DHCP server is on the subnet of location B (or behind a router
connected on this subnet), so the expected DHCP offer will come from the
wire interface (eth0) and definitely not from the wireless interface
(eth1).

Looking at "router" in the provided diagram, plus the placement of A and B, I am led to believe that location A is the primary network providing DHCP and outbound access.  Furthermore, Jochen was getting a DHCP assignment over his wireless interface before he tried to enable bridging.

Your suggestion of configuration as a router could work.  But NAT would not if A is the primary location, because the printer would no longer have a address visible to location A.