is the repo down? why is this happening?

[enhu]

linux-424f:/mnt # zypper in vlc
Retrieving repository 'openSUSE-11.3-Non-Oss' metadata [\]
Download (curl) error for 'http://download.opensuse.org/distribution/11.3/repo/non-oss/repodata/repomd.xml':
Error code: Connection failed
Error message: Couldn't resolve host 'download.opensuse.org'

this also appear each time i'm using yast

Download failed:
    Failed to download /media.1/media from http://download.opensuse.org/distribution/11.3/repo/non-oss/
History:
 -  [AbstractCommand.cc:224] URI=http://download.opensuse.org/distribution/11.3/repo/non-oss/media.1/media

can you tell me what to do please. and after skipping, this are the errors.

[|] Valid metadata not found at specified URL(s)
History:
- Unknown error reading from 'http://download.opensuse.org/distribution/11.3/repo/oss/'
- SKIP request: User-requested skipping of a file
- Download (curl) error for 'http://download.opensuse.org/distribution/11.3/repo/oss/repodata/repomd.xml':
Error code: Connection failed
Error message: Couldn't resolve host 'download.opensuse.org'

[HROAdmin26]

Couldn't resolve host 'download.opensuse.org'

Name resolution

Whatever DNS server you're using is not resolving the name to an IP address.

Nslookup can be used to confirm this:

nslookup download.opensuse.org
Server:  XX.XX.XX.XX
Address:  XX.XX.XX.XX

Non-authoritative answer:
Name:    download.opensuse.org
Address:  195.135.221.134

[enhu]

which file should i edit for this to work?