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New Member

Load-balancing with EIGRP

Hi,

We have two E1 links with two different Backbones.

I'm using EIGRP to load-balance ip traffic between the two links without using updates from the neighbors. So, I think, that EIGRP will only load-balance traffic using bandwidth and not metrics !

I've used to ip routes :

ip route 0.0.0.0 0.0.0.0 'ip of backbone 1'

ip route 0.0.0.0 0.0.0.0 'ip of backbone 2'

Each E1 link has a bandwidth statement and an 'ip bandwidth-percent' statement.

It's seems that it works for a little time but after that, all the traffic is balanced on one E1 link (the one with a small bandwidth) and the other (with a large bandwidth) is not used correctly.

What must I do ?

I'm wrong when I use EIGRP with this configuration ?

Thanks in advance

Fethi.

2 REPLIES

Re: Load-balancing with EIGRP

You have 2 default routes you are trying to load balance. Since they are static routes, EIGRP has nothing to do with this. You can use process switching or CEF to load balance the 2 links. I assume these 2 links are on 1 router.

If I misread what you wrote and the router is using EIGRP for the route(s?) do a show ip route to see if the route(s?) has the same metrics. Show ip eigrp top will also help. If the metrics are not the same, you can try and make them each with delay statements (which as a general rule you should use and not bandwidth). Bandwidth statements can also be wrong - bug CSCdj70556.

Worst case is using variance command until the problem is fixed.

As a side note 'ip bandwidth-percent' won't help load balance, it only restricts how much of the link eigrp may use for updates/hellos.

Let us know.

Steve

New Member

Re: Load-balancing with EIGRP

Yes, the two links are on the same router.

For the metrics, both routes have the same.

I'll try to use process switching or CEF.

Thank you for your help.

Fethi.

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