You can manually cost the links to be equal at both routers' interfaces.

At the T3 serial interface you can apply ip ospf cost 1 and do the same on the T1 serial interface.

Once you do that, you will see 2 equal paths towards the destination.

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Edison.

Hello David,

given the big speed mismatch I wouldn't make the two links to look like to have equal vost.

The way to do that has been explained by Edison.

Rather I would use PBR on both sides to send over the T1 selected flows (for example VoIP flows just to make an example)

Hope to help

Giuseppe

Like Giuseppe, I would advise against using equal cost load balancing with a T3 and T1.

OSPF only supports equal cost load balancing, but EIGRP supports unequal cost load balancing.

However, even if you deal with the issues of trying to use EIGRP, both routing protocols perform flow based load balancing. I.e., they just round-robin new flows without consideration for how bandwidth intensive each flow is or load on the link. Perhaps an even better solution, if your platform supports it, would be usage of OER/PfR. OER/PfR can balance both links to the same load factor. E.g. Both could be at 20%.

The major issue with using OER/PfR, except for the latest PfR PIRO variant, only static route or BGP injection is supported.