Hi Manish,
You certainly can do so. As long as you have four routes (each of them equal cost) pointing out each of these interfaces, then CEF will load-balance over these interfaces automatically.
If you are using default routes, you can use something like the following:
ip cef
ip route 0.0.0.0 0.0.0.0 atm0.32
ip route 0.0.0.0 0.0.0.0 atm1.32
ip route 0.0.0.0 0.0.0.0 atm2.32
ip route 0.0.0.0 0.0.0.0 atm3.32
Hope that helps - pls rate the post if it does.
Paresh
