You do have the required support contract so
if the mirror and base repo links in /etc/yum.repo.d/redhat????
point to the 6 repo and NOT to the 6.2 repo
then all you need to do is run " upgrade"
if they ARE pointing to the 6.2 repo then
Code:
su -
yum --releaseserver=6.4 upgrade
RHEL 6.4 is the current