ok, that is good idea. But,what I want is to be sure what if (for example) link up to intermediate switch (or router) of 1st provider fails, the packets go through 2nd provider channel.

...

Hi, Oleg.

Try to write two different filters for Your providers and apply them separatly in Exporting from each RIP to master table or even to separate table.

May be You should simply drop nets of first provider coming from second and visa vesta ?

P.S. I know You are doing load balancing , aren't You ? :-)