The physical network interface is configured even when the vlan interface only is defined in kickstart

Issue

• The 802.1q tagged vlan network interface can be configured inside the kickstart file in Red Hat Enterprise Linux 6.4. Refer Solution 25133
• To configure the vlan network interface only, it's configured in kickstart file. And the network kickstart command for the physical network interface is not included.
• For example, to configure the vlan interface i.e. eth0.123, the following network command is defined in the kickstart file. And, the network command for eth0 is not defined.

network --bootproto=static --device=eth0 --ip=192.168.0.100 --netmask=255.255.255.0 --gateway=192.168.0.254 --nameserver=192.168.0.1 --hostname=test.example.com --onboot=yes --noipv6 --vlanid=123 --activate

• But, eth0 was configured unexpectedly. It got the network information from DHCP, default gateway was changed, and it failed since it could not download any rpms from the installation repository.
• Also, /root/anaconda-ks.cfg doesn't include the correct vlan information after installation.