3G HWIC Combined Bandwidth

Unanswered Question
Jul 9th, 2009

The Cisco c1841 Router has 2 x HWIC slots. Can two HWIC-3G-GSM cards be used simultaneously from the same 1841 router to increase WAN Throughput?

I have this problem too.
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murabi Thu, 07/16/2009 - 07:44

This should work. Since we are using two HWIC cards (two wan interfaces), its is equivalent to two point to point links to the same destination. So this can either be used for backup/ redundancy or increasing the total throughput.

pjmcdougall Thu, 07/16/2009 - 23:47

Thks for your reply. Yes my thoughts also. Given the limited bandwidth of 3G you'd think there would be mention of this technique by Cisco. Might have to give it a try.

Roman Rodichev Sat, 07/25/2009 - 20:55

Keep in mind that if both 3G cards connect to the same carrier, you are not doubling the bandwidth. If you want to double bandwidth, you will need to use two different carriers.

Regards,

Roman

pjmcdougall Sun, 07/26/2009 - 01:05

Thanks Roman, but if I use a different framed-route (attrib 22) with each connection the carrier has no idea that the two connections come from the same physical device. Then I just use IOS smarts to route the traffic.

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