Centos7 設置靜態IP

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CentOS7 設置靜態IP

昨天不小心刪了sshd服務，沒想到是ssh服務。。。
[root]# systemctl enable | start | status sshd

然後設置的靜態ip也不能用了(brd 172.16.255.255)
正常應該是這樣(brd 172.16.33.255)

• 重零開始設置Centos7 網絡
  
  • 獲取網卡UUID
  • 獲取網卡MAC
  • 重新設置靜態IP

---

獲取網卡UUID

nmcli con show可以查看設備上的網卡的UUID

[root]# nmcli con show

名稱        UUID                                  類型            設備  

ens33       78dec34e-0826-45bb-aa9c-2628151d159f  802-3-ethernet  ens33 

有線連接 1  ce848193-d4c0-349a-b3c7-4fb14d2eba22  802-3-ethernet  ens37 

---

獲取網卡MAC

ip addr 中 link/ether 字段
nmcli 中 ethernet 字段

[root@ network-scripts]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN qlen 1
    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: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:50:56:28:aa:84 brd ff:ff:ff:ff:ff:ff
    inet 172.16.33.45/24 brd 172.16.33.255 scope global ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::250:56ff:fe28:aa84/64 scope link 
       valid_lft forever preferred_lft forever
3: ens37: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:05:93:7c brd ff:ff:ff:ff:ff:ff
    inet 192.168.126.129/24 brd 192.168.126.255 scope global dynamic ens37
       valid_lft 1405sec preferred_lft 1405sec
    inet6 fe80::ff5c:7409:a0fb:17d5/64 scope link 
       valid_lft forever preferred_lft forever

[root@ network-scripts]# nmcli
ens33: 連接的 to ens33
    "Intel 82545EM Gigabit Ethernet Controller (Copper) (PRO/1000 MT Single Port Adapter)"
    ethernet (e1000), 00:50:56:28:AA:84, hw, mtu 1500
    ip4 default
    inet4 172.16.33.45/24
    inet6 fe80::250:56ff:fe28:aa84/64

ens37: 連接的 to 有線連接 1
    "Intel 82545EM Gigabit Ethernet Controller (Copper) (PRO/1000 MT Single Port Adapter)"
    ethernet (e1000), 00:0C:29:05:93:7C, hw, mtu 1500
    inet4 192.168.126.129/24
    inet6 fe80::ff5c:7409:a0fb:17d5/64

lo: 未管理
    loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536

Use "nmcli device show" to get complete information about known devices and
"nmcli connection show" to get an overview on active connection profiles.

Consult nmcli(1) and nmcli-examples(5) manual pages for complete usage details.

設置靜態IP

cd /etc/sysconfig/network-scripts/

[root network-scripts]# ls ifcfg*
ifcfg-ens33  ifcfg-ens37  ifcfg-lo

更改或創建下列網卡配置文件，名字可以自己決定
決定

[root@ network-scripts]# cat ifcfg-ens37
HWADDR=00:0c:29:05:93:7c
TYPE=Ethernet
BOOTPROTO=static
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens37
UUID=78dec34e-0826-45bb-aa9c-2628151d159f
DEVICE=ens37
ONBOOT=yes
IPADDR=192.168.126.129
NETMASK=255.255.255.0
GATEWAY=192.168.126.1
DNS1=223.5.5.5

設置靜態IP修正20170907

GATEWAY= #注意：內網網卡這裏必須爲空，否則兩個網卡同時啓用後上不了外網

設置靜態IP 多網卡 僅本網使用

#GATEWAY=
DEFROUTE=no