I boot via NIC0 and my configurations are as follows:
Yeah, that's what I thought. Have a look at: http://www.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5.2/html/Installat... & http://kbase.redhat.com/faq/FAQ_80_531.shtm
The latter might shed some light. I am thinking you need tweak that a bit. jlc