This is how YUM should be configured on new band site hosting servers
See also: Creating a Band Site Hosting Server
# yum install yum-priorities
Edit all files in /etc/yum.repos.d
Add priority=1 to each (enabled) repo
# yum install epel-release
Add priority=2 to each enabled repo in /etc/yum.repos.d/epel.repo
/etc/yum.conf
assumeyes=0
exclude=*.i386 *.i586 *.i686
Update existing packages
# yum update