Using Two Internet Links on Cat 2821 with failover and load Balancing

[raviragmail]

Hi

I have Two wan Links of  1Mbps and 2Mbps

and have a Cisco 2821 router  , with 1 G703 card with 2 Serial Ports. , now i want to configure load balancing for both links so that i can utilize whole 3Mbps of bandwidth plus if one Link fails the whole Traffic shift to another link without affecting enduser.

can somebody guide me or help on this.

[Karel Vins]

Hi,

easiest way to do unequal load balancing is to use EIGRP. But it cannot be usable in your scenario.

Are your two links connected to the internet or enterprise wan?

If you use static routing you can set up two equal routes and track IP SLA to ensure that failed link is not used.

Regards,

Karel Vins

[Peter Paluch]

Hello Karel,

You are correct. In fact, EIGRP is the only protocol that is actually allowed to enter unequal-cost routes to the same destination into the routing table.

That being said, I think that perhaps the original post did not seek to configure unequal-cost load balancing. If the amount of traffic is reasonable, equal-cost load balancing would work quite nicely, and that can be configured with any routing protocol, even using static routes.

Best regards,

Peter

[Karel Vins]

You can use BGP dmzlink-bw in some situations (and if you are crazy enough:)

Regards

KV