Hi there,

What you are asking about is called Mutual redistribution and its doable but it can cause routing loops so you must take care:

Mutual redistribution between protocols should be done very carefully and in a controlled manner. Incorrect configuration could lead to potential looping of routing information. A rule of thumb for mutual redistribution is not to allow information learned from a protocol to be injected back into the same protocol. (You can use any filtering method).

http://www.cisco.com/en/US/tech/tk365/technologies_white_paper09186a0080094e9e.shtml#t37

here you are also a nice post from the forum:

http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Network%20Infrastructure&topic=WAN%2C%20Routing%20and%20Switching&CommCmd=MB%3Fcmd%3Ddisplay_location%26location%3D.1dde3932

HTH,

Mohammed Mahmoud.