1 综合网上的思路，大致有两种方案。一：通过交换机实现dhcp-relay 二：通过需要relay网内一台主机实现relay，由于嫌麻烦，我选择了第一种。
2 首先保证cobbler本地网段装机ok，然后注意把你设置网络ip那段给注释掉
#network --onboot yes --device eth0 --bootproto static --ip 40.40.40.150 --netmask 255.255.255.0 --gateway 40.40.40.1 --noipv6 --nameserver 202.98.192.67 --hostname puppet_server
或者直接把他设置为dhcp，否则会出现media无法获取，用cobbler装系统应该知道，这一步是在寻找安装介质之前做的，所以会获取不到media
3 公司戴尔交换机的设置大致为：
dhcp enable
int vlan 40
ip helper address 60.60.60.12
4 cobbler主机的dhcp文件
[root@cobbler ~]# cat /etc/dhcp/dhcpd.conf
# ******************************************************************
# Cobbler managed dhcpd.conf file
# generated from cobbler dhcp.conf template (Tue Jan 5 08:32:32 2016)
# Do NOT make changes to /etc/dhcpd.conf. Instead, make your changes
# in /etc/cobbler/dhcp.template, as /etc/dhcpd.conf will be
# overwritten.
# ******************************************************************
ddns-update-style interim;
allow booting;
allow bootp;
ignore client-updates;
set vendorclass = option vendor-class-identifier;
option pxe-system-type code 93 = unsigned integer 16;
subnet 60.60.60.0 netmask 255.255.255.0 {
option routers 60.60.60.12;
option domain-name-servers 114.114.114.114;
option subnet-mask 255.255.255.0;
range dynamic-bootp 60.60.60.15 60.60.60.70;
default-lease-time 21600;
max-lease-time 43200;
}
subnet 40.40.40.0 netmask 255.255.255.0 {
option routers 40.40.40.1;#vlan ip
option domain-name-servers 114.114.114.114;
option subnet-mask 255.255.255.0;
range dynamic-bootp 40.40.40.150 40.40.40.200;
default-lease-time 21600;
max-lease-time 43200;
next-server 60.60.60.12;
}
next-server 60.60.60.12;
filename = "pxelinux.0";5 然后在40网段就可以看到cobbler的系统安装界面了
6 可以查看cobbler端的日志看具体情况，tail /var/log/messages
本文出自 “启学的学习之路” 博客，请务必保留此出处http://qixue.blog.51cto.com/7213178/1742426
原文：http://qixue.blog.51cto.com/7213178/1742426