@sujeeth_kamath Hi so you have a DVD device in the system? See https://documentation.suse.com/sles/12-SP5/html/SLES-all/cha-update-offline.html#sec-update-offline-dvd
You just need DVD 1 and writeable DVD media to put the image onto with eg Brasero, when burning the image, make sure you use the slowest speed possible as well.