[manchesterwireless] Linksys WRT54G and WDS mode

[jgxhs at nessie.mcc.ac.uk]

You will always get a 50 % reduction of bandwidth for each hop on the
same channel with WDS,,,   its the way it works.

John.

On Wed, 31 Jan 2007 18:06:13 -0000, you wrote:

>Hi Andy
>
>down in Digcoop in Hackney (London) we've been using wrt54g's and Alchemy. We had a problem at one point and tried varying the power, and ended up actually dropping it down to 20mw in the end. Didn't find increasing the power really helped. (Hops are about 100 metres between APs).
>
>I'd be really interested to hear how it goes with the testing and possible migrating, we're thinking of moving to DD-WRT or possibly Freifunk/OpenWRT, any reports you could stick up on the list or on a web page would be great! 
>
>cheers
>Mark
>
>-----Original Message-----
>From: manchesterwireless-bounces+m.b.gaved=open.ac.uk at lists.pointless.net on behalf of Andy Gauton
>Sent: Wed 1/31/2007 3:14 PM
>To: Manchester's Wireless Community Network discussion list
>Subject: [manchesterwireless] Linksys WRT54G and WDS mode
> 
>Hi All,
>
>Warrington Wireless got a major bandwidth boost last week following an ISP 
>upgrade (who, what and how is not open to discussion I'm afraid for obvious 
>reasons)
>
>Unforuntately, I'm currently the last hop on a WDS setup. Before, I didn't 
>experience the bandwidth drop of WDS, however now I'm getting  50% (~4.5MB) 
>of the total (~9MB). We were at ~3MB. Nice increase :)
>
>Currently running Alchemy firmware with 3x WRT54G running WDS. Transmission 
>rate set to 36MB, transmit power default of 28mw. Our link was setup by 
>Darren and Harry back in the day, so I'm pretty confident all is well on the 
>roof, and our current "issue" is just WDS.
>
>I'm assuming that increasing the transmit power will have no positive 
>effect? We tried it about 2yrs ago and noticed no improvement, but that was 
>down to channel interference.
>
>If I increase the transmission rate higher than 36MB, and run speedtests on 
>the final hop router (adslguide and speedtest.net) the average speed is 
>lower than when set at 24MB. The 1st 2 routers in the chain get the full 
>bandwidth (~9MB), so 36MB is the sweet spot at the moment.
>
>This has proved that our current tranmission rate is stable at 36MB but 
>higher isn't 100% reliable which might be the limit of the WRT54G v1.1 that 
>we have (125mhz) with multiple PC's attached to each router. We currently 
>have no interference or line of sight issues, hence why I'm thinking it's 
>the router performance.
>
>Now, what I was thinking was trying 3x Linksys WRT54GS for the speedboost 
>and DD-WRT firmware.
>
>Would this give me a more reliable transmission rate above 36MB due to the 
>increased processor speed etc? Or more importantly, will I see less of the 
>WDS bandwidth drop - ie get more bandwidth due to the increased overall 
>wireless transmission rate?
>
>We're going to try DD-WRT in the next few weeks both in WDS and 
>Client-AP-Client mode to see if there is any improvement over our current 
>firmware, and to see if the client/AP mode is anymore reliable than it was 
>in previous 3rd party firmwares.
>
>And the next question. Does anyone have any spare Linksys WRT54GS that I 
>could borrow (2 in total as I've already got a spare), or even anyone 
>selling any cheap? Need to be serial CGN0 to CGN6.
>
>Look forward to your feedback
>Regards
>Andy :) 
>
>
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