Document URL: https://access.redhat.com/documentation/en-us/red_hat_satellite/6.3/html-single/upgrading_and_updating_red_hat_satellite/#migrating_a_self_registered_satellite
Section Number and Name: 2.1. Migrating Self-Registered Satellites
Describe the issue: In section 2.1 the only option we are providing to the customer is to register to the customer portal, but it is not possible for all the customers.
Suggestions for improvement:
So the steps suggested in the Satellite v 6.3 installation guide to setup local repo using RHEL and Satellite installation ISO  should also be provided for the satellite upgrade from 6.2 to 6.3 option.
These changes are live on the Customer Portal
2.2. Preparing a Self-Registered Disconnected Satellite