If the DMS was configured to use 'zypper dup' we should
download packages in advance for more stability. The reason
is that zypper dup always starts with deleting packages and
then continues with installing packages. If at install time
a package cannot be downloaded for some reason the zypper
process ends and leaves the system in an inconsistent state
schaefi
commented
3 years ago 
If the DMS was configured to use 'zypper dup' we should download packages in advance for more stability. The reason is that zypper dup always starts with deleting packages and then continues with installing packages. If at install time a package cannot be downloaded for some reason the zypper process ends and leaves the system in an inconsistent state