problemas con Yum

[Reinier en METUNAS]

>
> hola listeros, tengo lios al usar el yum, no he podido actualizar, me da
> este error!. al aprecer no puede abrir o leer el archivo
> alguna sugerencia?.
> saludos
> reinier
>
>
> [root en server ~]# yum update
> 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
> primary.xml.gz            100% |=========================|  80 kB    00:17
> update    : ################################################## 252/252
> Added 252 new packages, deleted 0 old in 1.87 seconds
> primary.xml.gz            100% |=========================| 344 kB    02:57
> http://mirror.centos.org/centos/4/os/i386/repodata/primary.xml.gz: [Errno
> 4]
> Soc
> Trying other mirror.
> Error: failure: repodata/primary.xml.gz from base: [Errno 256] No more
> mirrors try.
>
>
> ----------------------------------------------------------------------------
> ------------
> [root en server~]# yum -y install dhcp
> Setting up Install Process
> Setting up repositories
> Cannot open/read repomd.xml file for repository: update
> failure: repodata/repomd.xml from update: [Errno 256] No more mirrors to
> try.
> Error: failure: repodata/repomd.xml from update: [Errno 256] No more
> mirrors
> to try.
>
>


dale un:
 yum clean all

y luego un :
 yum -y update
........................................
nada, probe con esto y sigue igual, gracias