1.Centos 6网络配置
• 查看 IP 地址
[root@localhost ~]# ifconfigeth0 Link encap:Ethernet HWaddr FA:79:75:1E:74:00 inet addr:10.154.0.8 Bcast:10.154.0.255 Mask:255.255.255.0 inet6 addr: fe80::f879:75ff:fe1e:7400/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:176883 errors:0 dropped:0 overruns:0 frame:0 TX packets:112967 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:18585161 (17.7 MiB) TX bytes:18936319 (18.0 MiB)lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:132 errors:0 dropped:0 overruns:0 frame:0 TX packets:132 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:15346 (14.9 KiB) TX bytes:15346 (14.9 KiB)
• 修改 IP 地址
[root@bjdb4 ~]# vi /etc/sysconfig/network-scripts/ifcfg-eth0DEVICE=eth0 #网卡驱动名称 TYPE=EthernetUUID=4c0289bd-ca9b-433c-85bf-8b593d5b4c42 #网卡 UUID 号 ONBOOT=yes #网卡开启状态 NM_CONTROLLED=yesBOOTPROTO=static #把 DHCP 状态修改城 staticHWADDR=28:80:23:B8:B4:88 #mac 地址 IPADDR=172.18.1.40 #IP 地址 PREFIX=24 #子网掩码位数 GATEWAY=172.18.1.254 #网关 DEFROUTE=yesIPV4_FAILURE_FATAL=yesIPV6INIT=noNAME=\"System eth0\" #网卡名称
• 修改 DNS
[root@1234 ~]$ vi /etc/resolv.conf# Generated by NetworkManager# No nameservers found; try putting DNS servers into your# ifcfg files in /etc/sysconfig/network-scripts like so:## DNS1=xxx.xxx.xxx.xxx# DNS2=xxx.xxx.xxx.xxx# DOMAIN=lab.foo.com bar.foo.comnameserver 202.198.98.167 #修改为当地运营商的 DNS 地址 nameserver 8.8.8.8
• 修改网关地址
[root@1234 ~]$ vi /etc/sysconfig/networkNETWORKING=yes HOSTNAME=1234 #主机名 GATEWAY=172.18.1.254 #网关地址
• 静态路由设置（根据需要配置）
– 查看静态路由
[root@1234 ~]# route -nKernel IP routing tableDestination Gateway Genmask Flags Metric Ref Use Iface172.18.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0169.254.0.0 0.0.0.0 255.255.0.0 U 1002 0 0 eth00.0.0.0 172.18.1.254 0.0.0.0 UG 0 0 0 eth0
– 设置永久静态路由
[root@1234 ~]# vi /etc/rc.local#!/bin/sh## This script will be executed *after* all the other init scripts.# You can put your own initialization stuff in here if you don\'t# want to do the full Sys V style init stuff.touch /var/lock/subsys/localroute add -net 192.168.3.0/24 dev eth0 #新增路由地址段与子网掩码，出口网卡名称 route add -net 192.168.2.0/24 gw 192.168.2.254 #新增路由地址段与子网掩码，网关地址 [jqsoft@bjdb4 ~]$ vi /etc/sysconfig/static-routes any net 192.168.3.0/24 gw 192.168.3.254 #新增路由地址段与子网掩码，出口网关地址 any net 10.250.228.128 netmask 255.255.255.192 gw 10.250.228.129 #新增路由地址段与子网掩码，出口网关地址 [root@1234 ~]# vi /etc/sysconfig/network-script/route-eth0#默认格式：network/prefix via gateway dev intf0.0.0.0/0 via 172.16.10.2 dev eth0 #新增路由
• 重启网卡
[root@1234 ~]#service network restart
2.Centos 7 网络配置
• 查看 IP 地址
[root@localhost ~]# ifconfigens33: flags=4163 mtu 1500 inet 192.168.217.134 netmask 255.255.255.0 broadcast 192.168.217.255 inet6 fe80::d7cc:dd17:7991:6c64 prefixlen 64 scopeid 0x20 ether 00:0c:29:03:62:63 txqueuelen 1000 (Ethernet) RX packets 3455 bytes 248841 (243.0 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 637 bytes 54026 (52.7 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10 loop txqueuelen 1 (Local Loopback) RX packets 68 bytes 5908 (5.7 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 68 bytes 5908 (5.7 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
• 修改 IP 地址
[root@localhost ~]# vi /etc/sysconfig/network-scripts/ifcfg-ens33TYPE=\"Ethernet\"BOOTPROTO=\"static\"#把 DHCP 修改成 staticDEFROUTE=\"yes\"PEERDNS=\"yes\"PEERROUTES=\"yes\"IPV4_FAILURE_FATAL=\"no\"NAME=\"ens33\"UUID=\"8c7abe35-e956-4d21-bed2-31a92cbd17ea\"DEVICE=\"ens33\"ONBOOT=\"yes\"#网卡状态 IPADDR=192.168.0.230 #静态 IP GATEWAY=192.168.0.1 #默认网关 NETMASK=255.255.255.0 #子网掩码 DNS1=192.168.0.1 #DNS 配置
• 修改 DNS
[root@1234 ~]# vi /etc/resolv.conf# Generated by NetworkManager# No nameservers found; try putting DNS servers into your# ifcfg files in /etc/sysconfig/network-scripts like so:## DNS1=xxx.xxx.xxx.xxx# DNS2=xxx.xxx.xxx.xxx# DOMAIN=lab.foo.com bar.foo.comnameserver 202.198.98.167 #修改为当地运营商的 DNS 地址 nameserver 8.8.8.8
• 修改网关
[root@centos]# vi /etc/sysconfig/networkNETWORKING=yes HOSTNAME=1234 #主机名 GATEWAY=172.18.1.254 #网关地址
• 配置静态路由（根据需要配置）
– 查看路由表
[root@centos7 ~]# ip route showdefault via 192.168.150.254 dev enp0s3 proto static metric 1024192.168.150.0/24 dev enp0s3 proto kernel scope link src 192.168.150.110
– 添加静态路由
[root@centos7 ~]# vi /etc/sysconfig/network-scripts/route-ens3310.15.150.0/24 via 192.168.150.253 dev enp0s310.25.250.0/24 via 192.168.150.253 dev enp0s3
• 重启网络
[root@centos7 ~]# systemctl restart network