You are assigning current interfaces to the target firewall. The following steps are to map your existing interfaces to the preferred interfaces.
Select the firewall you are migrating from the drop-down menu when migrating from multiple firewalls.
(OR) Click 1 To 1 Mapping, if the user want to use the same interfaces as the source firewall
Using 1 - 1 Mapping under assigned interfaces is recommended.
Any unmapped interfaces will be dropped.