Centos 7 網絡配置

Centos 7開始使用ip命令替換了之前的ifconfig

 

ip  [選項]  操做對象{link|addr|route...}

# ip link show                # 顯示網絡接口信息
# ip link set eth0 upi           # 開啓網卡
# ip link set eth0 down          # 關閉網卡
# ip link set eth0 promisc on      # 開啓網卡的混合模式
# ip link set eth0 promisc offi     # 關閉網卡的混個模式
# ip link set eth0 txqueuelen 1200   # 設置網卡隊列長度
# ip link set eth0 mtu 1400        # 設置網卡最大傳輸單元
# ip addr show                # 顯示網卡IP信息
# ip addr add 192.168.0.1/24 dev eth0 # 設置eth0網卡IP地址192.168.0.1
# ip addr del 192.168.0.1/24 dev eth0 # 刪除eth0網卡IP地址

# ip route list                 # 查看路由信息
# ip route add 192.168.4.0/24  via  192.168.0.254 dev eth0 # 設置192.168.4.0網段的網關爲192.168.0.254,數據走eth0接口
# ip route add default via  192.168.0.254  dev eth0    # 設置默認網關爲192.168.0.254
# ip route del 192.168.4.0/24      # 刪除192.168.4.0網段的網關
# ip route del default          # 刪除默認路由

 

開啓自動獲取

首先查看本身的網卡信息

ip addr show

 

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:c9:9b:0b brd ff:ff:ff:ff:ff:ff


可查看到網卡名稱爲eno16777736

進入network-scripts

[root@localhost ~]# cd /etc/sysconfig/network-scripts
[root@localhost network-scripts]# ls
ifcfg-eno16777736  ifdown-eth   ifdown-isdn    ifdown-sit       ifup          ifup-ib    ifup-plip   ifup-routes    ifup-tunnel        network-functions-ipv6
ifcfg-lo           ifdown-ib    ifdown-post    ifdown-Team      ifup-aliases  ifup-ippp  ifup-plusb  ifup-sit       ifup-wireless
ifdown             ifdown-ippp  ifdown-ppp     ifdown-TeamPort  ifup-bnep     ifup-ipv6  ifup-post   ifup-Team      init.ipv6-global
ifdown-bnep        ifdown-ipv6  ifdown-routes  ifdown-tunnel    ifup-eth      ifup-isdn  ifup-ppp    ifup-TeamPort  network-functions
[root@localhost network-scripts]#

能夠查看到咱們相應網卡的配置文件爲ifcfg-eno16777736

使用vi ifcfg-eno16777736

進入編輯

TYPE=Ethernet
BOOTPROTO=dhcp
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
UUID=5b96b479-11f3-4aec-b984-129de5721e7b
DEVICE=eno16777736
ONBOOT=no

將ONBOOT=no修改成ONBOOT=yes並保存退出重啓

重啓後再次使用ip addr show可查看到

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:c9:9b:0b brd ff:ff:ff:ff:ff:ff
    inet 192.168.133.133/24 brd 192.168.133.255 scope global dynamic eno16777736
       valid_lft 1252sec preferred_lft 1252sec
    inet6 fe80::20c:29ff:fec9:9b0b/64 scope link
       valid_lft forever preferred_lft forever

咱們網卡已經自動獲取到ip了

手工設置IP地址：

 

TYPE=Ethernet
#BOOTPROTO=dhcp
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
UUID=5b96b479-11f3-4aec-b984-129de5721e7b
DEVICE=eno16777736
ONBOOT=yes
IPADDR0=192.168.133.130
PREFIX0=24
GETWAY0=192.168.133.2
DNS1=192.68.133.2
DNS2=218.85.152.99

經過上面配置。咱們爲系統指定ip 子網掩碼 網關以及DNS地址。

[root@localhost ~]# ip addr show1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00    inet 127.0.0.1/8 scope host lo       valid_lft forever preferred_lft forever    inet6 ::1/128 scope host       valid_lft forever preferred_lft forever2: eno16777736: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000    link/ether 00:0c:29:c9:9b:0b brd ff:ff:ff:ff:ff:ff    inet 192.168.133.130/24 brd 192.168.133.255 scope global eno16777736       valid_lft forever preferred_lft forever    inet6 fe80::20c:29ff:fec9:9b0b/64 scope link       valid_lft forever preferred_lft forever習慣使用ifconfig的能夠實現聯網後經過yum install net-tools安裝net-tools組件使用ifconfig。