You may also get some additional help at the site below:
From the SuSE manual-
...Multiple Network Devices
Modern laptops usually have a network card and a WLAN card. If you configured both devices with DHCP (automatic address assignment), you may encounter problems with the name resolution and the default gateway. This is evident from the fact that you can ping the router but cannot surf the Internet. The Support Database at http://portal.suse.com
features an article on this subject. To find the article, enter “DHCP” in the search dialog.