Issue

• The vlan network interface can be configured in kickstart file from Red Hat Enterprise Linux 6.4. https://access.redhat.com/knowledge/solutions/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 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=172.31.123.6 --netmask=255.255.255.0
--gateway=172.31.123.1 --nameserver=172.31.123.1 --hostname=test.example.redhat.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.