ADSL Load Sharing

[london.ism]

Hey guys

I have 4 ADSL lines from the same ISP going into one Cisco 887VA router. Does anyone know how can I do load sharing between the 4 lines without getting the ISP involved?

At the moment I have route maps and policy based routing but that only works for fail over.

Thanks in advance

Elena

[John Blakley]

If you have equal cost routes, it will load share automatically. In other words, do you have 4 default gateways listed at the same time if you do a "show ip route"?

HTH,
John

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[london.ism]

Hi John

I have a gateway of last resort and then 4 S* (candidate default).

My set up is a bit more complicated then that. I have two LANs and one uses 2 of the ADSL lines (one as maine, the other as back up) and the other uses the remaining 2 in the same set up.

Elena

[John Blakley]

Can you post your config and "show ip route?"

Also, is the end goal for both lans to use all 4 links at all times?

HTH,
John

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[london.ism]

No, I would like one LAN to load share over two lines and the other LAN over the remaining two.

Gateway of last resort is x.x.x.x to network 0.0.0.0

S*    0.0.0.0/0 [1/0] via x.x.x.x

        0.0.0.0/0 [1/0] via y.y.y.y

        0.0.0.0/0 [1/0] via z.z.z.z

        is directly connected, Dialer 0

Thanks

Elena

[Abzal]

Hi,

You could configure properly NAT for each LAN. Route-map and ACL for different interface and do overload.

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

Abzal

[london.ism]

Abzal

NAT is already configured in a very similar way to your example.

My question was about something different...

[Abzal]

If I understood you correctly 4 links two of them as primary remain two as backup? If I'm correct

Perhaps this example might help you, combined with previous route-map NAT example.

http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/813-cisco-router-ipsla-basic.html

Hope it will help