What type of migration? How old is the EX system? what was the current state? What version was it currently running? What is acceptable log loss, requirements?
Sometimes the older systems are so outdated, database schema is so jacked up, Ftp agents are outdated, it might be best to start fresh with a healthy nic.db. on 4.0 SP3 with content 2.0 (Import old data and run lsmaint -rebuild
true migration leveraging database migration will carry everything over. Also might want to consider extracting certain tables information for device collection and import into the nic.db to expedite device collection. Lot's of questions will depict different answers.
