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Re: build bridge with DHCP



On Tuesday 27 October 2009 11:05:12 green wrote:
> Hey all, I need a bridge for the following scenario:
>
> [systemB] eth0 <--> eth0 [systemA] wlan0 <--> wlan0 [AP]
>
> I am working on systemA, which normally sends dhcp requests answered by the
> AP. I want to add systemB to that network.  When it sends dhcp requests
> over eth0, the AP should answer.

Bridging (i.e. brctl and friends) can only be used to connect two networks 
that use the same layer 2 protocol.  Ethernet and 802.11a/b/g do not use the 
same layer 2 protocol.  I believe at the very least you'll need to use an "ARP 
Proxy", and you may be better off just routing traffic.

I *think* we have the reverse working: [laptops] <-> wlan0 [OpenWRT AP] eth0 
<-> [AT&T Router], but I didn't set that up, so we might be having the AP run 
a dhcp daemon and route traffic.
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