[root@g3m202 ~]# yum update yum
Setting up Update Process
Setting up repositories
update                    100% |=========================|  951 B    00:00
base                      100% |=========================| 1.1 kB    00:00
addons                    100% |=========================|  951 B    00:00
extras                    100% |=========================| 1.1 kB    00:00
Reading repository metadata in from local files
Error: failure: repodata/primary.xml.gz from base: [Errno 256] No more mirrors to try.
[root@g3m202 ~]#