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Dual ISP's: using one for upload and one for download.

Posted on 2004-08-20
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Last Modified: 2010-03-17
Hi,
I'v got 2 ISP's, one with a really fast download speed (around 5Mb/s), but a slow upload (128 Kb/s) and one with a decent download (1 Mb/s) but a really goad upload (384 Kb/s). How can I configure a PC to use the fastest connection in either direction, preferably without adding a second network card due to place restrictions.
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Question by:fhj518
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by:grblades
grblades earned 170 total points
ID: 11850987
Hi fhj518,
You can't really do this. All you could di is configure routing manually so that all traffic goes over the 5Mb link with the exception of specific destinations which go over the other link. If you do this you will still need 2 network cards in your machine.
You might want to have a look at the Linksys RV042 router (http://www.linksys.com/products/product.asp?grid=34&scid=29&prid=639) which supports 2 internet connections and will balance the load between them.
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nagraves earned 160 total points
ID: 11860842
Or just stick with the 5mbit/128kbit connection and ditch the other. That would be more cost efficient.
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by:Gilgamoth
Gilgamoth earned 170 total points
ID: 11890055
Most internet traffic will return to the IP address that requested it, so sending it down one of the connections will result in it coming back down the same connection.

You have a number of options,

1) Either use a router that supports Network Load Balancing (as suggested by grblades), but I'm not sure this would work as you expect, because it probably balances on the outbound connection. This means that the majority of traffic will go out over the 5Mb link, which will be slower on the return journey.

2) Ditch one and use the other and suffer the difference

3) Ditch both and try and find a provider who will offer better upload speeds without compromising the download too much for a cost similar to the price of both

Regards,

Gil
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