DELL OMSA를 yum으로 설치하던 중 오류가 나왔습니다.

linux.dell.com을 찾을 수 없다고 하는데...

이유가 무엇일까요?

# yum -y install srvadmin-all

...

(18/49): srvadmin-isvc-7.4.0-4.42.2.el6.x86_64.rpm                                                                                      | 7.6 MB     00:08    
http://linux.dell.com/repo/hardware/latest/platform_independent/rh60_64/srvadmin-x86_64/srvadmin-isvc-snmp-7.4.0-4.42.2.el6.x86_64.rpm: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'linux.dell.com'"
Trying other mirror.
http://linux.dell.com/repo/hardware/latest/platform_independent/rh60_64/srvadmin-x86_64/srvadmin-itunnelprovider-7.4.0-4.14.1.el6.x86_64.rpm: [Errno 14] PYCURL ERROR 6 - "Couldn't resolve host 'linux.dell.com'"
Trying other mirror.