>>>We want to get all CI Topology from UCMDB Side, so that we can view them in BSM. so where should we place probe on UCMDB or BSM & whether it would be population or federation.
DFM Probe will have to be placed on BSM side and report to BSM. CMStoODBSync integration point should be available out-of-the-box at Admin -> ODB Administration -> Data Flow Management -> Integration Studio in BSM. That will be population, not federation.