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Is it possible to setup a second wireless router at the edge of another wireless routers range limit, and extend the networks range?

Edit: It will be used in a home environment, so money and space have to be considered. Would it be easier to run a wired backbone between the routers?

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up vote 4 down vote accepted

I've used a dedicated hardware repeater before and ultimately replaced it with a hardwire run. The speeds I was getting on the WLAN were pretty crappy when I was running through the repeater, and with broadband speeds now creeping up to the levels where it can saturate a 802.11g network that's a significant thing now. Add in some remote TV viewing from my MythTV and it just wasn't holding up.

I bit the bullet and surface-mounted a Cat-5 cable to a spot in the middle of the house and put my access-point there instead. It improved reception in the places we needed it and speeds were noticeably better.

Another option to look into if a hardwire isn't in the cards would be to see if your AP has replaceable antenna. That can save you from potential spousal-veto regarding an ugly wire snaking across the house. Upgraded antennas can extend the range enough to pick up those dead spots.

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I have no problem running cable. I actually prefer cable but it seems like wireless is all the rage, so I thought I would look into a solution using only wireless. So you would recommend running cable, if possible? – Tester101 Jul 14 '09 at 13:43
YES! Run a cable to a 2nd AP, and set that AP to a different channel (I think) than the other AP. Your wireless clients should auto-switch based on which is the stronger signal, and speeds should be on par with what you have now, only over a larger area. It's a win-win if you can run the cable. – sysadmin1138 Jul 14 '09 at 15:40

Generally speaking, it is. You need to provide more specific information about the model of router and the firmware it is running, however.

I would looking into the DD-WRT firmware if your router supports it. It will allow you to use your router in this mode and it will add many additional features.

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+1 I have done this with DDWRT and it works nicely. Also, DDWRT is not hard to install at all now. THere are very specific instructions on the site for each router. Here is the 'supported hardware' page: – cop1152 Jul 13 '09 at 20:39

While some wireless routers (and access points) can also function as a repeater, you need to take into account for every repeater you add to the "chain" you effectivly halve the speed/bandwidth.

A better way to acheive greater wireless coverage would be to run cable, and have an access point instead of a repeater. Give both the wireless router and the access point the same SSID and encryption/key and your wireless devices will be able to move between to two seamlessly.

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Is this true? How does a packet decide what router to go through when you're within range of both access points? – jacobsee Jul 19 '09 at 18:42

As others have mentioned, most consumer-grade routers do not have Wireless Repeater capability in their firmware. If you have a router supported by one of the Open Source firmwares (such as DD-WRT, OpenWRT, or Tomato), then you may be able use them instead. DD-WRT maintains a database of hardware it supports on its website, although the original router most of this work stems from is the venerable Linksys WRT54G (prior to hardware rev-4).

Once you have the firmware flashed, it is relatively easy to get it into Repeater Bridge mode. Here is a HOW-TO from the DD-WRT wiki.

I have pretty much this exact setup configured at home with a pair of WRT54GL routers (~$50 each at pretty much any place that sells commodity hardware, both computer stores like Tiger Direct as well as places like Best Buy). The only thing to watch for is a little extra latency if you're on the repeater and sometimes the two can briefly lose sync. It works just fine with WPA security on both routers. I'd also suggest using a different SSID for the Repeater so you can easily keep track of which your devices are connecting to (as opposed to letting the device firmware roam between them... sometimes you get stuck on the far router which results in a pretty choppy signal until it decides to roam back)

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Yes, but only if that second wireless router can be configured as a "repeater". Many consumer level devices cannot. Basically the router has to be able to connect to the existing LAN. A hack-ish way around this would be to use a wireless bridge to connect to the LAN port of the second unit to provide the link, but at that point, you might as well have bought a real repeater

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Tomato is another alternative to DD-WRT. Bear in mind, similar to DD-WRT, there are only specific routers that this will work on. If you do have one of these routers though it works like a charm.

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I'm not quite sure, but I think the Apple AirPort Extreme can act as a repeater, though it is a quite expensive router..

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