two AP's with same SSID's, need computer to change between the two

I have two AP's with the same SSID's and they are on the same channel.

Is this not right? Do they need to be on different channels?

I want to have a computer be able to go back and forth between the two when one gets too low of a signal.
BryceRichertAsked:
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Frosty555Connect With a Mentor Commented:
Oh also, you can specify on most routers / aps what connection speed the routers will negotiate. By default "all speeds" are usually selected but if all-or-nothing fast throughput is necessary for you, you can probably configure on the router side to only connect to clients that can transfer at 54mbps or whatever you need the threshold to be.
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Frosty555Commented:
Put them on different channels. The computer should automatically select the one with the highest signal strength. The computer may not necessarily hop right away to another access point if it is already connected, though. That depends on the "Roaming Aggressiveness" setting in the device properties for your wireless card. Usually the computer hops only if the signal degrades to the point that a connection cannot be held anymore. Then it will renegotiate with the stronger access point.
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BryceRichertAuthor Commented:
Do all cards have a "roaming aggressiveness" setting within them?

Is there a recommended card that does aggressive roaming the best???
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BryceRichertAuthor Commented:
actually, I need these to be usb type solutions... is there a recommended vendor that supports aggresive roaming in a usb device?
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Frosty555Commented:
I think that most of them do, and usually the default setting is the one you want. You do not want to jump to and fro all the time just because a slightly stronger AP is detected. That would cause connetion drops and hanging on the computer. Instead, you want to hang onto the connection you have as long as you can, and change only when necessary.

You can get to the settings by opening Network Connections, right-click and go to properties on the wireless device, click the "Configure" button beside the device name, and go to the advanced tab.
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Frosty555Commented:
USB devices are the same. It shouldn't matter what the physical communication layer is. You should still see the device in Network Connections.

I believe that as far as roaming is concerned, most cards are the same. And usually you don't want to touch the default setting - it's already optimal.
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BryceRichertAuthor Commented:
aRe there any cards where you could say, if the connection goes below a threshhold, 15 megs for example, then to go back to the other ap? I have an app that needs the minimum to run off a database and if it goes down to 5 megs or so before jumping over then there are issues that are worse than the time it takes to jump from one AP to the other. The jumping only happens once a day or so.
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Frosty555Commented:
the settings in windows are fairly crude, and they would measure in dB, rather than throughput. You'd be looking more for a card that comes with helper software that has this functionality. Some software allows you to specify that it should only connect if it can obtain a certain speed, and that would cause it to search for a better access point as soon as the speed drops below that threshold. I don't know of any cards offhand, though.
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BryceRichertAuthor Commented:
thanks.. I'll take this all in. I think I want to handle the speed issue on the wireless level so I'll ask the guys at cdw to hook me up with something. thanks for the help!
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