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routing over multiple circuits

We currently have a 256k circuit to site X and use eigrp.

We will be installing a 2mb circuit to our sitte X. This goes over a 3rd party ip backbone. We need to run IPsec over this for security. to our site X

Both 256k and 2mb terminate on the same router in site x

Will eigrp load balance across the 2mb and 256k? What happens when the 256k if full will eigrp just send down the 2mb?

2 REPLIES
Silver

Re: routing over multiple circuits

It will chosses the path with the more attractive metric , If the 256 K line has a lower delay then the 2 MB this link will be chosen .

Gold

Re: routing over multiple circuits

If you configure variance with a number large enough to cause EIGRP to install both routes in the routing table, then the routing table will use the difference between the two metrics to compute a load share value. This load share value is then used to determine how much traffic is shipped down each link.

http://www.cisco.com/warp/customer/103/eigrp-toc.html#loadbalancing

Will probably help you understand the process better without me rewriting it here. :-)

Russ.W

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