> I will mention this for those who have not experienced it. I use a Linksys as
> a "bridge" from my 1st level office to the wireless access point that is in
> the attic. The thing acting as a bridge has 4 RJ45s, which connect various
> wired (ethernet) devices to the upstairs access point (router), which does
> the DHCP. Because of the linksys acting as a bridge, one cannot rely on the
> MAC address seen by the access point to assign static addresses (it only
> sees one MAC address, the WAN-side of the bridge). I am not sure of all the
> intrinsics, but this is what happens with my setup. It does not adversely
> affect the operation of those devices, so I do not care to find a better
> solution. I thought I'd share.

It sounds like you need to turn your 'bridge' into a bridge :-)

I think you have it performing NAT on its 'WAN' port connecting to the
rest of your network. This would explain the single MAC address. Turn
this off. Merge the WAN port with the other 4 RJ45 in one
bridge. Ethernet frames will then be 'bridged' between ports. It will
also make it a little faster. It should be able to bridge in hardware,
but it will be doing NAT in software. 

With NAT turned off, you then have one big flat network where
everything sees everything. Your one central DHCP server gives out IP
addresses to everybody.

You only want one NAT in your network, connected to your ISP link. NAT
is evil, but a necessary evil for ISP's since we have run out of
public IPv4 addresses. However inside your private network, the
16581375 IP addresses in 10.0.0/8 should be enough for your house.