title: Is it posssible to add default repository/repositories to SLES when the original repository is unavailable?
body: <p>I've got a SLES server installed by someone who is not available.
  I've checked <code>/etc/zypp/repos.d</code> , there is a repo file <code>SUSE-Linux-Enterprise-Server-11-SP4 11.4.4-1.109.repo</code></p>
  <p>It's content is:</p>
  <pre><code>[SUSE-Linux-Enterprise-Server-11-SP4 11.4.4-1.109]
  name=SUSE-Linux-Enterprise-Server-11-SP4 11.4.4-1.109
  enabled=1
  autorefresh=0
  baseurl=cd:///?devices=/dev/sr0
  path=/
  type=yast2
  keeppackages=0
  </code></pre>
  <p>The CD repository (<code>/dev/sr0</code>) is not available.</p>
  <p>I would like to add default net repository/repositories to it (such as <a href="http://ftp5.gwdg.de/pub/opensuse/discontinued/distribution/11.4/repo/oss/" rel="nofollow noreferrer">e.g. this</a>, which <code>zypper</code> puts to <code>/etc/zypp/repos.d</code>). However after searching a lot, I could not find how to do that.
  I know how to add a repository, but I don't know how to add default repositories.</p>
  <p>Could you please provide a <code>zypper addrepo</code>/<code>zypper ar</code> command for these?</p>
  <p><em>EDIT:</em> This question can be applied generically to any version of SLES, not just for <em>SLES 11 SP4</em> as when it was originally asked.</p>