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Help with setting up WDS please

Discussion in 'Tomato Firmware' started by wongnog, Nov 8, 2009.

  1. wongnog

    wongnog LI Guru Member

    Hi all, my main router is a Linksys WRT54GL with Tomato 1.25 ND (Victek) that is connected wired to one computer and set up with WPA/WPA2 wireless for other computers. I just picked up an Asus WL-520GU and successfully flashed to Tomato 1.25 ND USB (teddy_bear) and I trying to set it up WDS so I can connect my new router to my xbox 360, new TV, and Blu-ray player.

    I'm following instructions I found here but am running into some trouble. The first part I'm stuck on is it says to set the Default Gateway of the 2nd router to the IP of the 1st router ( However I can't find the page to set the Default Gateway ANYWHERE! Can anyone help please?
  2. borosai

    borosai Addicted to LI Member

    First, you have to set the second router's WAN/Internet type to Disabled. After you do that, Default Gateway will appear in the LAN section. This is all under the Basic --> Network page. Be sure to read everything carefully. :)
  3. wongnog

    wongnog LI Guru Member

    okay I have to admit I'm confused about one thing... Do I want to set up both routers as "Access Point + WDS", or do I set the main router as "Access Point" and my new router as "Wireless Bridge"? What is the difference between the two, and are there any significant differences in their setup?
  4. borosai

    borosai Addicted to LI Member

    I recommend that you follow the guide in the Tomato FAQ (from your link): set both to Access Point + WDS. You need to configure the main router with WDS in order to link it with the second router. Just get the system working first, then you can experiment until it breaks.

    There's plenty of detailed information online about wireless bridging and WDS, but the basic difference is that a WDS-configured router allows you to connect to it with wireless clients (it works as a repeater), while a wireless bridge does not (it reserves its wireless connection to connect to the main router).
  5. wongnog

    wongnog LI Guru Member

    Thanks for your help borosai, I was finally able to set up WDS. I think my main problem was figuring out what my wireless MAC was for the routers -- I had no idea there was a different MAC address for WAN, LAN, and wireless!

    Anyway I had read somewhere that WDS splits the bandwidth in half between the two routers -- is this true, or maybe I read mistakenly?
  6. borosai

    borosai Addicted to LI Member

    I'm not sure of the details, but it should affect the wireless throughput. From this guide (http://www.tomsguide.com/us/how-to-wds-bridge,review-253-2.html):

  7. RonWessels

    RonWessels Network Guru Member

    Firstly, there are known issues with the later Victek ND versions supporting WDS using WPA. The more recent wireless driver that Victek uses has better AP performance, but also has issues with WDS using WPA. I would suggest using the non-ND version for your application.

    Secondly, many people keep repeating the (technically incorrect) quote of WDS cutting the throughput in half for every hop. It is only true when using WDS+AP with a wireless client communicating with a computer on the other side of the WDS link. This is because the router's radio is doing double-duty: it must receive the packets from the client, then re-transmit them over the WDS link. Hence two wireless transmission times are required to send each packet. There is no issue if the client is wired to the router. [ Actually, the same issue is still present, but the transmission time over the wired link is so much faster than over the wireless link that it's not noticable ]. This is not a fault of WDS, it is instead a fault of the architecture. If you don't want bandwidth loss, use one router for the WDS link wired to a second router for the AP duty. You still have a two wireless transmission time delay, but a second packet can be coming over the AP link while the first packet is being sent over the WDS link so there's no bandwidth loss. But of course that is twice the hardware cost.

    Oh, and even using WDS+AP, the bandwidth does not halve for each hop. It doesn't go 1/2, 1/4, 1/8, ... Instead it goes 1/2, 1/3, 1/4, ... as each hop introduces one additional packet transmit delay in the overall packet throughput. Here is a link to a thread where the performance was measured using real hardware.
  8. wongnog

    wongnog LI Guru Member

    Thanks for the tip. I seem to be okay right now with my main Linksys router running Victek ND, I have WDS working with WPA/WPA2 encryption. I prefer the ND drivers for better AP performance, would there be any harm in running teddy_bear's ND+USB firmware on a WRT54GL?
  9. wongnog

    wongnog LI Guru Member

    I managed to set up both routers as WDS+AP without problem, but I'm considering reconfiguring my settings in order to decrease my bandwidth loss. Does it makes sense if I keep my Linksys router (connected to cable modem) as WDS+AP, but my Asus router (on another floor, supplying network access to TV, xbox360, blu-ray player, etc) as Wireless Ethernet Bridge? Will this eliminate the "halving" of the throughput? If so, what changes will I have to make to my setup? Thanks very much.
  10. wongnog

    wongnog LI Guru Member

    I know this is an old bump, but nobody replied to my previous question... I have left my main Linksys router on WDS+AP mode and changed my second Asus router to just WDS. I'm still experiencing that "halving" of bandwidth. What if I changed my setup to AP for the main router and Wireless Bridge for the second one? Will that make any difference?

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