DHCP Across Wireless Bridge

Anthony Hoppe anthony.hoppe at gmail.com
Mon Dec 30 22:14:29 UTC 2013

Just wanted to confirm that setting the EnGenius WAP to "WDS Bridge" did 
not work.  It also has a "WDS Client" mode, which I don't quite 
understand.  In this mode, it claimed that it had associated with my 
wireless network, but it and all devices behind it were unreachable.

I am still curious as to why Cisco's implementation of DHCP seems to 
work in this setup.  I will do some dhcpdump-ing with the Cisco DHCP 
server enabled, see how it looks compared to isc-dhcp-server, and report 
back (I will reply to my response to Glenn).

~ Anthony

On 12/29/2013 10:39 AM, Anthony Hoppe wrote:
> Hi Simon,
> I have always been under the impression that if I set the EnGenius WAP
> to "WDS bridge", it will only be able to associate with other EnGenius
> WAPs that are in "WDS bridge" mode.  In my current setup, the EnGenius
> WAP associates with a Meraki MR16 WAP.  I suppose I could give it a try
> and see what happens.
> Though, the interesting thing is that Cisco's DHCP server seems to work
> fine with the current setup.  I wonder what it does differently...
> ~ Anthony
> On Sun, Dec 29, 2013 at 9:54 AM, Simon Hobson <simon at thehobsons.co.uk
> <mailto:simon at thehobsons.co.uk>> wrote:
>     Anthony Hoppe wrote:
>      > I am using an EnGenius WAP (I can't find and/or recall the model
>     at the moment) in client bridge mode.
>     I have some EnGenius stuff in use at work - and when setting up a
>     bridge there is a bit of a gotcha. Working from memory (it's a long
>     time since I set htem up), you need to set the client end into WDS
>     mode, not client bridge mode. I know it seems back to front, but in
>     client bridge mode, all the clients appear to come from the MAC
>     address fo the client bridge; in WDS mode, you get to see the client
>     MACs. If the MAC address is mangled, the client won't get the right
>     packet back - and DHCP won't work.
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