setup VLAN without primary LAN?

[mcclnx mcc <mcclnx@xxxxxxxxxxxx>]

we would like setup VLAN on CENTOS 5.X and 4.x.  Only VLAN will active, but primary LAN NOT active.  E.g "eth0" inactive, but "eth0.2" active.
I have been tried several ways, but never successful.  
Any ideal?

      ______________________________________________________________________________________________________付費才容量無上限？Yahoo!奇摩電子信箱2.0免費給你，信件永遠不必刪！ http://tw.mg0.mail.yahoo.com/dc/landing_______________________________________________CentOS mailing listCentOS@xxxxxxxxxxxxxx://lists.centos.org/mailman/listinfo/centos