yum update fails with "Error: failed to retrieve repodata/filelists.xml.gz from rhel-x86_64-server-5 [Errno 4] Socket Error "

Issue

• yum update on a newly installed RHEL 5 server reports

        Error: failed to retrieve repodata/filelists.xml.gz from rhel-x86_64-server-5
        error was [Errno 4] Socket Error:

• Scheduled updates are failing on client registered with Satellite Server with below menitoned error message:

failed to retrieve getPackage/nss-tools-3.14.3-6.el5_9.i386.rpm from rsd-rhel-i386-server-5 error was [Errno 4] Socket Error: timed out [[6]]