[c-nsp] wisdom of installing many routes into ospf

[Mike]

Hello,

    I have a BRAS terminating many pppoe sessions (>2000 lets say). I 
would like to allow my bras to participate in OSPF and I am wondering 
what the collected wisdom about doing so is. I want to be able to assign 
some of these sessions fixed subnets for example, and this is one 
motovator. Another is that even for connected interface addresses, I 
sometimes want special routing (eg: instead of core -> bras -> end user, 
I may want core -> intermediate -> bras -> end user) which I can use 
ospf to override. Has anyone done this and has anyone any references 
where I might see an example or some documentation on pitfalls and so 
forth?

Thank you.

Mike-