hi share the yum repository (e.g /var/ftp/pub/yumrepository) through an ftp server or http server and access the repository by specifying the location of the server in the client file
/etc/yum.repos.d/rhel-debuginfo.repo
....
....
ftp://pub/yumrepository
enabled=1
..
#service yum-updatesd restart
#yum install perl*
it will show whether the yum repository is available in the client side .
better to check ftp connections from the client side beforehand .
#ftp servername
check with anonymous login if the repo is available ....
cheers priyo