Enabling YUM Repository update on OEL6.5

Edit the /public-yum-ol6.repo file  resides in   /etc/yum.repos.d

vi /etc/yum.repos.d/public-yum-ol6.repo

enable the following locations

You Need to enable the following block's enabled value to 1 
[public_ol6_latest]
[public_ol6_UEK_latest]

If you company has proxy settings,You may have to set the proxy settings like follows.

export http_proxy=ip:port/
ex:
export http_proxy=192.9.220.235:3128/

Then type  yum  list. You May list down all the rpms available.