vagrant-cachier-ng/docs/buckets/zypper.md

Zypper

Used by SuSE guests, will get configured under guest's /var/cache/zypp/packages. It will also make sure that keep-packages is enabled for all repositories.

To manually enable it:

Vagrant.configure("2") do |config|
  config.vm.box = 'some-suse-box'
  config.cache.enable :zypper
end