Directional traffic flow/weighting

[stormster]

I have a core network of 4 6509's connected by les 100's. the traffic flow settled with a particular 'redundant link' such that 2 sites were 'daisy chained' and one was 'on a stick'. After replacing one cat's sup1a's with sup720's, the traffic flow changed direction flowing the opposite way round from the sup720 cat.

We arent using RIP or OSPF, can i 'weight' the traffic such that it reverts back to it's original flow paths?

I can force it by shutting down a particular interface, but this defeats the redundancy we have.
TIA