Mine

#
# 20050322 LSU (iwt) new default yum.conf
#

[main]
cachedir=/var/cache/yum
debuglevel=2
logfile=/var/log/yum.log
pkgpolicy=newest
distroverpkg=redhat-release
tolerant=1
exactarch=1
# exclude=kernel*

[base]
#name=Red Hat Linux $releasever - $basearch - Base
#baseurl=http://mirror.dulug.duke.edu/pub/yum-repository/redhat/$releasever/$basearch/
name= (LSU)Red Hat Linux $releasever - $basearch - Base
baseurl=http://ibiblio.lsu.edu/redhat/dist/$releasever/install/RedHat/RPMS/
        http://redhat.lsu.edu/dist/$releasever/install/RedHat/RPMS/

#[updates]
#name=Red Hat Linux $releasever - Updates
#baseurl=http://mirror.dulug.duke.edu/pub/yum-repository/redhat/updates/$releasever/

[LSU-noarch]
name=(LSU)Red Hat Linux 9 - noarch Updates
baseurl=http://ibiblio.lsu.edu/redhat/dist/$releasever/updates/noarch/
        http://redhat.lsu.edu/dist/$releasever/updates/noarch/

[LSU-i386]
name=(LSU)Red Hat Linux 9 - i386 Updates
baseurl=http://ibiblio.lsu.edu/redhat/dist/$releasever/updates/i386/
        http://rh.lsu.edu/dist/$releasever/updates/i386/

[LSU-i586]
name=(LSU)Red Hat Linux 9 - i586 Updates
baseurl=http://ibiblio.lsu.edu/redhat/dist/$releasever/updates/i586/
        http://rh.lsu.edu/dist/$releasever/updates/i586/

[LSU-i686]
name=(LSU)Red Hat Linux 9 - i686 Updates
baseurl=http://ibiblio.lsu.edu/redhat/dist/$releasever/updates/i686/
        http://rh.lsu.edu/dist/$releasever/updates/i686/

[LSU-athlon]
name=(LSU)Red Hat Linux 9 - athlon Updates
baseurl=http://ibiblio.lsu.edu/redhat/dist/$releasever/updates/athlon/
        http://rh.lsu.edu/dist/$releasever/updates/athlon/


[LSU-fedoralegacy]
name=(LSU-fedoralegacy) FedoraLegacy $releasever - Updates
baseurl=http://ibiblio.lsu.edu/fedoralegacy/dist/redhat/$releasever/updates/i386/
        http://fedoralegacy.lsu.edu/dist/redhat/$releasever/updates/i386/