DHCP中继配置

Posted 2022-07-19 tanxiaojuncom

 

中继

1、[root@localhost ~]# mkdir /media/cdrom        //新建目录

2、[root@localhost ~]# mount /dev/cdrom /media/cdrom       //挂载镜像

3、[root@localhost ~]# rpm -ivh /media/cdrom/Packages/dhcp-4.2.5-36.el7.centos.x86_64.rpm    //rpm安装dhcp

4、[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eno16777736   //编辑第一个网卡的配置文件

TYPE="Ethernet"
BOOTPROTO="static"    //手动更改模式
DEFROUTE="yes"
PEERDNS="yes"
PEERROUTES="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
NAME="eno16777736"

DEVICE="eno16777736"
ONBOOT="yes"
IPADDR=192.168.153.128      //配置当前网卡所匹配的ip
NETMASK=255.255.255.0      //配置子网掩码
~ 

修改第二个网卡的配置文件时，没有对应的文件，从第一个网卡复制一份给它                       

5、[root@localhost ~]# cp /etc/sysconfig/network-scripts/ifcfg-eno16777736 /etc/sysconfig/network-scripts/ifcfg-eno33554984

6、[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eno33554984     //修改第二个网卡的配置文件

TYPE="Ethernet"
BOOTPROTO="static"
DEFROUTE="yes"
PEERDNS="yes"
PEERROUTES="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
NAME="eno33554984"
DEVICE="eno33554984"
ONBOOT="yes"
IPADDR=192.168.203.12
NETMASK=255.255.255.0
~                                                                            
~                    

7、[root@localhost ~]# systemctl restart network    //重启网络

8、[root@localhost ~]# rpm -ql dhcp     //查看关于dhcp的指定软件包

9、[root@localhost ~]# vim /etc/sysctl.conf    //编辑虚拟机的交换功能 
10、[root@localhost ~]# sysctl -p   //开启交换功能
net.ipv4.ip_forward = 1
11、[root@localhost ~]# systemctl restart network     //重启网络服务

 

服务器

1、[root@localhost ~]# mkdir /media/cdrom

2、[root@localhost ~]# mount /dev/cdrom /media/cdrom

3、[root@localhost ~]# rpm -ivh /media/cdrom/Packages/dhcp-4.2.5-36.el7.centos.x86_64.rpm

4、[root@localhost ~]# vim /etc/dhcp/dhcpd.conf     //编辑安装dhcp

option domain-name "example.org";       //域名
option domain-name-servers 202.106.0.20,8.8.8.8 ;     //DNS服务器

default-lease-time 60000;       //默认租约时间
max-lease-time 720000;      //最长租约

//第一个网段
subnet 192.168.153.0 netmask 255.255.255.0     //定义分配IP地址网段子网掩码
  range 192.168.153.10 192.168.153.110;     //该网段的IP地址池范围
  option routers 192.168.153.1;       //路由网关

//第二个网段
subnet 192.168.203.0 netmask 255.255.255.0
  range 192.168.203.10 192.168.203.110;
  option routers 192.168.203.1;

//配置时注意结尾用；大括号要成对出现

 

5、[root@localhost ~]# service dhcp start    //Centos 6中的开启dhcp服务

6、[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0     //编辑网卡的配置文件

DEVICE=eth0
HWADDR=00:0C:29:5B:BC:69
TYPE=Ethernet
UUID=b83f3f70-f409-4ae4-b176-9b3636b89664
ONBOOT=yes
NM_CONTROLLED=yes
BOOTPROTO=dhcp
IPADDR=192.168.153.131
NETMASK=255.255.255.0
GATEWAY=192.168.153.128    //与服务器同一网段的ip地址作为网关

 

 

系统日志

/var/log/messages       //可用于检查网络问题，检查错误

 

 

租约文件

/var/lib/dhcpd/dhcpd.leases

 

释放IP

 

dhclient   -r  网卡号

 

重新获取

dhclient   -d  网卡号