Reducing the costs of I.T without reducing the functionally of your systems is one of the major obstacles to overcome. One of these costs is bandwidth,especially in India.
One of the first bandwidth saving tips any organization should know is the importance of creating a local YUM repository on your LAN. Not only you decrease the time it takes to download and install updates,you also decrease bandwidth usage. This saving will definitely please the suites of any organization.
This "How To" shows you a simple yet effective way of setting up your local YUM server and client.
You can download the configuration document from here -> https://www.ibm.com/developerworks/mydeveloperworks/blogs/Local_Yum_Repo_CentOS_5.x/resource/LocalYumRepo_CentOS5.x.zip