kamal,
read carefully.
you assign one RA code and colour on the whole network.
But in the end, one Routing Area is defined by RAI
RAI = LA code + RA code
So there are as many RA as there are LA ! Even though only one code is used.
I hope I am clear.
and I hope I’m not crazy…
Now as i said this approach is weird : it *should* work, but I never tried it.