cobbler/cobbler — pull request #992 by aronparsons (2014-06-23 15:15:36+00:00)
Title: remove colon from VLAN regex pattern

colons are not used to designate VLANs, but rather virtual interfaces
such as eth0:1. this is commonly used to add a second IP address
to an interface.

from /etc/sysconfig/network-scripts/ifup:
MATCH='^.+\.[0-9]{1,4}$'