label centos731611x8664
 	MENU LABEL CentOS 7.3.1611 x86_64
 	KERNEL /pxeknife/installers/centos/7.3.1611/x86_64/vmlinuz 
 	APPEND reiserfs jfs xfs btrfs initrd=/pxeknife/installers/centos/7.3.1611/x86_64/initrd.img method=http://archive.kernel.org/centos-vault//7.3.1611/os/x86_64/ ip=dhcp