查看本机网卡#fconfig 配置静态ip地址vi /etc/sysconfig/network-scripts/ifcfg-ens33 ifcfg-自己的网卡
[root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-ens33 TYPE="Ethernet" PROXY_METHOD="none" BROWSER_ONLY="no" BOOTPROTO="static" #dhcp改static DEFROUTE="yes" IPV4_FAILURE_FATAL="no" IPV6INIT="yes" IPV6_AUTOCONF="yes" IPV6_DEFROUTE="yes" IPV6_FAILURE_FATAL="no" IPV6_ADDR_GEN_MODE="stable-privacy" NAME="ens33" UUID="c5fe79f2-77d7-4431-9814-79f6646b6083" DEVICE="ens33" ONBOOT="yes" #no改为yes,表示开机自启 IPADDR="192.168.26.128" NETMASK="255.255.255.0" GATEWAY="192.168.26.2" #网关可在虚拟网络设置->NAT设置中查找 DNS1="192.168.26.2" #这里将网关地址设置为DNS地址重启网络服务并测试 # systemctl restart network.service
[root@localhost ~]# systemctl restart network.service [root@localhost ~]# ping www.baidu.com PING www.baidu.com (14.215.177.39) 56(84) bytes of data. 64 bytes from www.baidu.com (14.215.177.39): icmp_seq=1 ttl=128 time=324 ms 64 bytes from www.baidu.com (14.215.177.39): icmp_seq=2 ttl=128 time=23.7 ms 64 bytes from www.baidu.com (14.215.177.39): icmp_seq=3 ttl=128 time=17.0 ms 64 bytes from www.baidu.com (14.215.177.39): icmp_seq=4 ttl=128 time=16.4 ms ^C --- www.baidu.com ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3004ms rtt min/avg/max/mdev = 16.473/95.325/324.068/132.095 ms没有数据包丢失，静态ip地址配置成功
关键字查询dhcp配置软件是否有预装
[root@localhost ~]# rpm -qa|grep dhcp dhcp-libs-4.2.5-79.el7.centos.x86_64 dhcp-4.2.5-79.el7.centos.x86_64 dhcp-common-4.2.5-79.el7.centos.x86_64我这里已经预装好4.2.5版本的，没有的话可与从网上获取安装#yum -y install dhcp
查看并编辑配置文件dhcp.confcat /etc/dhcp/ vi dhcpd.conf
# # DHCP Server Configuration file. # see /usr/share/doc/dhcp*/dhcpd.conf.example # see dhcpd.conf(5) man page # #声明网段和子网掩码 subnet 192.168.26.1 netmask 255.255.255.0 { range 192.168.26.100 192.168.26.200; #动态分配的ip范围 option domain-name-servers 192.168.26.2; #DNS服务ip地址 option domain-name "internal.example.org"; option routers 192.168.26.2; option broadcast-address 10.5.5.31; default-lease-time 6000; max-lease-time 72000; #host用于声明主机属性，一般用来分配固定的ip地址 host VMClient { #host后面 + 主机名字 hardware ethernet 00:0c:29:cd:f2:d6; #客户机MAC地址 fixed-address 192.168.26.5; #保留的ip地址 } }这里只配置了一些最基础的参数，更多的案例可以通过dhcp.conf文件中的/usr/share/doc/dhcp*/dhcpd.conf.example给出的样例去参考。 编辑完成后保存并退出，重启dhcp服务 # systemctl restart dhcpd.service
[root@localhost dhcp]# systemctl restart dhcpd.service Job for dhcpd.service failed because the control process exited with error code. See "systemctl status dhcpd.service" and "journalctl -xe" for details.出错了。。。 这时候千万不要慌，稳住心态打开系统日记文件 cat /var/log/messages 查找到最近的一次启动日志中
Jul 1 13:00:55 localhost systemd: Stopping DHCPv4 Server Daemon... Jul 1 13:00:55 localhost systemd: Starting DHCPv4 Server Daemon... Jul 1 13:00:56 localhost dhcpd: Internet Systems Consortium DHCP Server 4.2.5 Jul 1 13:00:56 localhost dhcpd: Copyright 2004-2013 Internet Systems Consortium. Jul 1 13:00:56 localhost dhcpd: All rights reserved. Jul 1 13:00:56 localhost dhcpd: For info, please visit https://www.isc.org/software/dhcp/ Jul 1 13:00:56 localhost dhcpd: /etc/dhcp/dhcpd.conf line 7: subnet 192.168.26.1 netmask 255.255.255.0: bad subnet number/mask combination. Jul 1 13:00:56 localhost dhcpd: subnet 192.168.26.1 netmask 255.255.255.0 Jul 1 13:00:56 localhost dhcpd: ^ #我们可以看到这里提示第七行出错了，可能是子码掩网的问题 Jul 1 13:00:56 localhost dhcpd: Configuration file errors encountered -- exiting Jul 1 13:00:56 localhost dhcpd: Jul 1 13:00:56 localhost dhcpd: This version of ISC DHCP is based on the release available Jul 1 13:00:56 localhost dhcpd: on ftp.isc.org. Features have been added and other changes Jul 1 13:00:56 localhost dhcpd: have been made to the base software release in order to make Jul 1 13:00:56 localhost dhcpd: it work better with this distribution. Jul 1 13:00:56 localhost dhcpd: Jul 1 13:00:56 localhost dhcpd: Please report for this software via the CentOS Bugs Database: Jul 1 13:00:56 localhost dhcpd: http://bugs.centos.org/ Jul 1 13:00:56 localhost dhcpd: Jul 1 13:00:56 localhost dhcpd: exiting.这时候我们可以返回到dhcpd.conf文件中查找问题 原来是我的子网网段写错了 192168.26.1改成192.168.26.0，改成VMnet8中的子网ip 重启dhcp服务 [root@localhost dhcp]# systemctl restart dhcpd.service 这边并没有报错，说明重启成功
这里选择win2003的客户机进行测试 这里获取的ip地址和我们之前保留给它的地址一样 测试成功
