The software described in this documentation is either in Extended Support or Sustaining Support. See https://www.oracle.com/us/support/library/enterprise-linux-support-policies-069172.pdf for more information.
Oracle recommends that you upgrade the software described by this documentation as soon as possible.

3.2.3 About Oracle Linux Installation Media

Oracle Linux 6 Update 4 contains two distinct repository sources on the installation media for the Red Hat Compatible Kernel and the Unbreakable Enterprise Kernel. To configure yum to use both repositories from an ISO image of the installation media, create the file /etc/yum.repos.d/Media.repo containing entries similar to the following:

[ol6_base_media]
name=Oracle Linux 6 Update 4 Base Media
baseurl=file:///media/ISOimage/Server
gpgkey=file:///media/ISOimage/RPM-GPG-KEY
gpgcheck=1
enabled=1

[ol6_uek_media]
name=Oracle Linux 6 Update 4 UEK Media
baseurl=file:///media/ISOimage/UEK2
gpgkey=file:///media/ISOimage/RPM-GPG-KEY
gpgcheck=1
enabled=1

Adjust the value of the baseurl and gpgkey parameters to match the mount point of the ISO image on your system. If you do not require one of the repositories, set the value of the corresponding enabled parameter to 0.