Question on two DSL lines combined (bonded) from one ISP

jwhaas052671 · ‎08-19-2011

I noticed another post about 2 DSL lines, but it isn't anything like this question. Anyway, I know basic routing and can do frame and other basic connecections but I'm a bit stuck on this one.

I am doing some work for a company that has about 25 users. They have 2 DSL lines, same provider, but one one is in service. That line is saturated. It apears their VoIP traffic, internet, and email traffic all go through this 10MB line. I really don't have a lot of DSL/Cisco experience. Is it possible to bond two DSL lines with one Cisco router. Can I really double the bandwidth like I'm trying to do or will it just really load balance? I haven't a clue as to what Cisco router or cards to buy if it can be done. The only other option was to go with an appliance from Mushroom, but it's expensive. The provider "CentryLink" says they have a few clients that do it, but they wont support it if something breaks.

Any help appreciated.

J

Marwan ALshawi · ‎08-19-2011

Hi

No you can't unless you use a separate device like loadbalancer

However you can load share the traffic over the two links for example send VoIP over one link and mail and http traffic over the other and if one link guise down all traffic will use the remaining link

to get it working in the way you want you PBR with ipsla for path selection and failover also you need to consider the nat configuration

Please refer to the bellow document I posted before on csc which help achieve what you want

https://supportforums.cisco.com/docs/DOC-8313

HTH

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randy.preston · ‎02-20-2012

In our area (NW Montana), CenturyLink offers a bonded DSL circuit which provides up to 25 Mg down and 2 Mg up; this solution uses two copper DSL pairs bonded in a Cisco 2200DR model router. Ask your service rep whether this is available in your area.

paolo bevilacqua · ‎02-21-2012

This is often asked, had you searched before asking

You can use IOS NAT load balancing:

http://www.cisco.com/en/US/tech/tk648/tk361/technologies_configuration_example09186a0080950834.shtml

jwhaas052671 · ‎02-21-2012

Paolo,

Had you read my post, you would have not been so quick to post a snarky comment!

First of all, I wanted to know if the DSL lines couple be bonded, not load balanced. Second, I did find a few posts on DSL but it wasn't what I was looking for. Your post configuration states the setup will only use one ISP at a time, which is load balancing. Practice what you preach. I am going to get with Century Link to see if they can do what Randy.Preston commented on.

paolo bevilacqua · ‎08-15-2015

[edited]