help! how to up grade my glibc?

wang9736 <[email protected]>
Newsgroups gmane.linux.rpm.yum
Message-ID <15640278.652571186476522110.JavaMail.coremail@bj126app101.126.com>
 hi all
 i use redhat linux 7.3 ,and want to upgrade my glibc from 2.2.5 to 2.3.6.
my yum.conf is below
[main]
cachedir=/var/cache/yum
debuglevel=2
logfile=/var/log/yum.log
pkgpolicy=newest
proxy=http://192.168.1.100:8080
[base]
name=Red Hat Linux $releasever base
baseurl=http://mirror.dulug.duke.edu/pub/yum-repository/redhat/$releasever/$basearch/
[updates]
name=Red Hat Linux $releasever updates
baseurl=http://mirror.dulug.duke.edu/pub/yum-repository/redhat/updates/$releasever/
------------------------------------------------------------------------------------
root @localhost wang #yum list
Gathering package information from servers
Getting headers from: Red Hat Linux 7.3 base
IOError - # 2 - No such file or directory
dose it means website above dosenot supply any software i need ?
how should i do?
by the way i have a Fedora 7 DVD iso disk,how can i upgrade my glibc to the newest on the
DVD disk?the high version will be compatible with my kernel?

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