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超级作用域:
ega:主机数目比较大,比254要多,一个c类网段不够分,所以要两个网段才行,还要这两个网段之间能够通信。
这时候可以把路由器和DHCP服务器结合到一起
前期准备:
1.同基础配置
2.需要给两个网段DHCP服务器是要都能访问的,所以要配两个IP地址(充当了路由器的作用)
开始:
/etc/sysconfig/network-scripts/ifcfg-ens33
IPADDR=10.10.10.10
PREFIX=24
IPADDR1=20.20.20.20
PREFIX1=24
也可以通过mntui工具设置
修改dhcp配置文件
/etc/dhcp/dhcpd.conf
重启服务
systemctl restart dhcpd
打开路由转发 (做路由器)
也同样是修改配置文件 /etc/sysctl.conf
打开之后修改 net.ipv4.ip_forward=1
注意Centos7和Centos8中是没有这一行的。直接添加进去即可
修改完成后,
执行sysctl -p读取配置文件
然后就配置完成
测试: