dhcp错误，日志如下
an 2 02:31:33 lylinux dhcpd: No subnet declaration for eth0 (192.168.88.128).
Jan 2 02:31:33 lylinux dhcpd: ** Ignoring requests on eth0. If this is not what
Jan 2 02:31:33 lylinux dhcpd: you want, please write a subnet declaration
Jan 2 02:31:33 lylinux dhcpd: in your dhcpd.conf file for the network segment
Jan 2 02:31:33 lylinux dhcpd: to which interface eth0 is attached. **
Jan 2 02:31:33 lylinux dhcpd:
Jan 2 02:31:33 lylinux dhcpd:
Jan 2 02:31:33 lylinux dhcpd: Not configured to listen on any interfaces!
Jan 2 02:31:33 lylinux dhcpd:
Jan 2 02:31:33 lylinux dhcpd: This version of ISC DHCP is based on the release available
Jan 2 02:31:33 lylinux dhcpd: on ftp.isc.org. Features have been added and other changes
Jan 2 02:31:33 lylinux dhcpd: have been made to the base software release in order to make
Jan 2 02:31:33 lylinux dhcpd: it work better with this distribution.
Jan 2 02:31:33 lylinux dhcpd:
Jan 2 02:31:33 lylinux dhcpd: Please report for this software via the CentOS Bugs Database:
Jan 2 02:31:33 lylinux dhcpd: http://bugs.centos.org/
Jan 2 02:31:33 lylinux dhcpd:
Jan 2 02:31:33 lylinux dhcpd: exiting.
原因：
没有读取到配置文件
解决：
# cp -f /usr/share/doc/dhcp-4.1.1/dhcpd.conf.sample /etc/dhcp/dhcpd.conf