Prepare the ASA for Migration
Verify that the ASA device meets the requirements for configuration migration; see ASA Device Requirements.
Identify the access control lists (ACLs) and NAT policies you want to export.
Prune as many inessential rules from the configuration as possible. Cisco recommends that you reduce the complexity and size of your ASA configuration as much as possible prior to conversion. To determine how many entries are present in the ACL: