8 WAN bonding - is it possible by cisco?

Answered Question
Aug 16th, 2009

Hi there, I'm a newbie to cisco, and I'm wondering if somebody can help me choose the right cisco router solution for my current situation:

8 internet links via WiMAX CPEs, terminated with Fast Ethernet ports. We used to depoly some loadbalancing appliances to accoplish this taskm but here we are now trying to get this solutioin from CISCO if possible. So many thanks in advance for your help.

Correct Answer by Paolo Bevilacqua about 7 years 5 months ago

Avoid per-packet, it just causes trouble as you noticed. Note router balances per-flow and not just per-destination.

Over time, the traffic will be statistically distributed, that is all what matters and you cannot do better than that.

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Paolo Bevilacqua Sun, 08/16/2009 - 13:25

You cannot really "bond" ethernet links.

However, the router wil statistically distribute traffic over them and you should be fine anyway.

cisco96050 Mon, 08/17/2009 - 11:43

Sounds good p.bevilacqua, could you advice me with a specific configuration? Router model / Network Modules?

Paolo Bevilacqua Mon, 08/17/2009 - 12:44

Would recommend a router in 2800 class, according to your budget also. It also depends what is the aggregate speed of these links.

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cisco96050 Mon, 08/17/2009 - 12:53

Ok p.bevilacqua, every WiMAX ethernet line can get 2Mbps Download/512kbps Upload speeds. Now what is the right network module that I can use for each line, and is there any network module can handle them all once?

After I spent some time in cisco and other websites, I figured out I can get this up using 2811 - 2821, and the old 3640 / 3660 with Cisco NM-2E-2W. I'm right?? thanks for your help and I will not forget to rank of course

Paolo Bevilacqua Mon, 08/17/2009 - 13:22

I would use a minimum of a 1841, front-end with a 29xx switch, or a 28xx with hwic-9esw.

Avoid old routers because they are not adequate anymore.

cisco96050 Mon, 08/17/2009 - 15:28

but isn't those modules (hwic-4esw/hwic-9esw) are just L2 switching ports as I already know from cisco docs, or can be used as a routing ports?? Please explain.

Paolo Bevilacqua Mon, 08/17/2009 - 15:53

Can be used as routed ports, just assign each port to a different vlan and configure it.

cisco96050 Tue, 08/18/2009 - 10:05

I have all the gadgets here now, I will try to start configuring 1841+hwic-4esw asap and will be back with the results. I dunno where should I start exactly, and our advice is really helpful. Thanks

cisco96050 Mon, 08/31/2009 - 14:41

thanks alot p.bevilacqua for your support, it worked well but not fine as I expected becouse of the default cisco load-balancing technology (per-destination). Now when I tried to switch the ip load balancing to per-packet basis, I couldn't reach the internet anymore and even the ping has a lot of time-outs.

Any I deas???

Correct Answer
Paolo Bevilacqua Mon, 08/31/2009 - 14:45

Avoid per-packet, it just causes trouble as you noticed. Note router balances per-flow and not just per-destination.

Over time, the traffic will be statistically distributed, that is all what matters and you cannot do better than that.

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