If you want to use static, I think IfUp is the better solution, you can changed it from YAST / Network Devices / Network Settings / Global Options, then set your IP by editing the network adapter there and the default GW via the Routing tab.
How did yyou configure that? Did you use YaST > Network Devices > Network Settings? And then the Routing tab?
You only have to fill in the IP address of the router to be used for the defaulot route in the first field there. That is all.
Which is definitely different from yours where you have 0.0.0.0 as the IP address of your router. And That can not be correct.
And before I forget, please post computer text in the same way as I do, Complete with prompt and command and output and next prompt. And copy/paste that between CODE tags. You get the CODE tags by clicking on the # button in the tool bar of the post editor.
yes, i had done all of above.; using ifUp and modified routing tab. but those don’t seem to help. from my understanding, ultimately, the configured routing tab should be reflected in the file /etc/sysconfig/network/routes.