[CentOS-virt] onboot=yes not working for eth0.x:y interfaces?

[Dennis Jacobfeuerborn]

Hi,
I ran into a Problem when using alias interfaces with vlans on a centos 5 box.
When I define such an interface and do a "service network restart" the 
alias interface doesn't get started. Starting it manually works fine.
Also after changing DEVICE=eth0.10:0 to DEVICE=eth0:0 in the config file 
the interface is started after a network restart.

Does anyone have an idea what the problem might be or a suitable workaround?

Regards,
   Dennis