buildroot to build toolchain on Linux

Hi hippo:

I am testing boa and DHCP now.

Frist I must config the ethernet setting. I use the ifconfig command as follow:

ifconfig eth0 inet addr:192.168.0.85 Mask:255.255.255.0 up

but I find the command not setting my dvb success.

I use ping command use loopback address(127.0.0.1),it's OK.

I think the problem maybe I use wrong config method.

I want to use ifconfig -h command to look for help,but no any information display.

Can you help me? Thank you.