Re: WDS ping

From: Kristian Hoffmann (
Date: 2002-03-04 08:13:08 UTC

We used to bridge our wireless network which included 7 T1s and ~10 access points. The amount of broadcast traffic being generated and needlessly broadcast over the wireless portion of our network was disgusting. Instead of playing with BREPF (Bridged Ethernet Packet Filtering, I think), we decided to do something that didn't crash our routers on a regular basis. Routing. It was/is a painful process to switch but it was worth it in our case. And yes, dhcp relay agents play an important part in making that work. There was a definite advantage to bridging in the beginning. But as the network got larger it's drawbacks became very visible. I have to appologize for being so negitive towards bridging but I wasted a lot of valuable time trying to get WDS to work before giving up on it. The only case I can think of where bridging is absolutely necessary is if you want to run PPPoE over a multiple wireless networks linked together. I don't think there is any way to route ppp packets unless you somehow manage to do PPPoEoIPoE. :P


On Sun, 3 Mar 2002, Jim Thompson wrote:

> On Sun, Mar 03, 2002 at 03:20:04AM -0600, Jim Thompson wrote:
> >
> > I'd love to look at the code. Routing isn't *always* possible.
> >
> > Jim
> Could you name some your top instances of this?
> The main one is 'wireless extension'.
> ethernet <--> WDS <--> WDS <--> WDS <--> ethernet
> One in particular i'm thinking of is where i have an antenna
> shooting into a coffee house down the street, and want to put an openap
> in there, but have my dhcp server in my apartment. So forwarding dhcp
> requests from openap to smc(prism2 card) card in pc sitting by window
> is what i desire. I have set up an openap and am getting familiar
> with what it can/can't do. Possibly i could forward the request via
> routing foo or the linux regular ethernet bridging but then the only
> device i'm going to have is the prism card in the openap so probably
> i'm stuck with WDS 802.11 foo, but still figuring.
> In this instance you can run a DHCP relay on the openap box inside the coffee shop,
> and have the dhcp server in your apartment service the requests.

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