为 CentOS7 虚拟机添加第二块网卡
一、在虚拟中添加网卡
1、右击虚拟机,在弹出的菜单中选择【设置】,弹出如下图所示的【虚拟机设置】窗口,在窗口单击【添加】按钮。
2、弹出如下图所示的【添加硬件向导】窗口,在窗口中的【硬件类型】列表中选择【网络适配器】,单击【下一步】按钮。
3、弹出如下图所示的窗口,在窗口的【网络连接】列表中选择【仅主机模式】,单击【完成】按钮完成网卡添加。
4、最终结果如下图所示。此中【网络适配器3】就是新添加的网卡。
二、网卡配置
1、查看新增的网卡信息
- [root@localhost ~]# ifconfig
- ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
- inet 192.168.1.12 netmask 255.255.255.0 broadcast 192.168.1.255
- inet6 fe80::20c:29ff:fe89:50e prefixlen 64 scopeid 0x20<link>
- inet6 2409:8a44:3d36:4750:20c:29ff:fe89:50e prefixlen 64 scopeid 0x0<global>
- ether 00:0c:29:89:05:0e txqueuelen 1000 (Ethernet)
- RX packets 149 bytes 12923 (12.6 KiB)
- RX errors 0 dropped 50 overruns 0 frame 0
- TX packets 91 bytes 12014 (11.7 KiB)
- TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
- ens38: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
- ether 00:0c:29:89:05:22 txqueuelen 1000 (Ethernet)
- RX packets 0 bytes 0 (0.0 B)
- RX errors 0 dropped 0 overruns 0 frame 0
- TX packets 0 bytes 0 (0.0 B)
- TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
- lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
- inet 127.0.0.1 netmask 255.0.0.0
- inet6 ::1 prefixlen 128 scopeid 0x10<host>
- loop txqueuelen 1 (Local Loopback)
- RX packets 72 bytes 6248 (6.1 KiB)
- RX errors 0 dropped 0 overruns 0 frame 0
- TX packets 72 bytes 6248 (6.1 KiB)
- TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
复制代码 2、创建网卡配置文件
(1)查看网卡配置文件
- [root@localhost ~]# cd /etc/sysconfig/network-scripts/
- [root@localhost network-scripts]# ls
- ifcfg-ens33 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
复制代码 (2)查看新增网卡的UUID
- [root@localhost network-scripts]# nmcli con show
- 名称 UUID 类型 设备
- ens33 0a5654b2-79b9-4f51-960d-bf567c68bdb9 802-3-ethernet ens33
- 有线连接 1 7a1aae4e-a183-351f-95d0-d0c34ded228d 802-3-ethernet --
复制代码 (3)利用已存在的网卡配置文件复制一个新的配置文件,名称为ifcfg-ens38
- [root@localhost network-scripts]# cp ifcfg-ens33 ifcfg-ens38
- [root@localhost network-scripts]# ls
- ifcfg-ens33 ifdown-bnep ifdown-ipv6 ifdown-routes ifdown-tunnel ifup-eth ifup-isdn ifup-ppp ifup-TeamPort network-functions
- ifcfg-ens38 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
复制代码 (4)修改网卡配置文件ifcfg-ens38的内容如下:
- TYPE=Ethernet
- BOOTPROTO=static
- DEFROUTE=yes
- PEERDNS=yes
- PEERROUTES=yes
- IPV4_FAILURE_FATAL=no
- NAME=ens38 # 网卡名称
- UUID=7a1aae4e-a183-351f-95d0-d0c34ded228d
- DEVICE=ens38 # 设备名称
- ONBOOT=yes
- IPADDR=10.1.1.12
- PREFIX=24
复制代码 (5)重新查看新增网卡的`UUID
- [root@localhost network-scripts]# nmcli con show
- 名称 UUID 类型 设备
- ens33 0a5654b2-79b9-4f51-960d-bf567c68bdb9 802-3-ethernet ens33
- ens38 7a1aae4e-a183-351f-95d0-d0c34ded228d 802-3-ethernet ens38
复制代码 (6)查看网卡信息
- [root@localhost network-scripts]# ifconfig
- ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
- inet 192.168.1.12 netmask 255.255.255.0 broadcast 192.168.1.255
- inet6 fe80::20c:29ff:fe89:50e prefixlen 64 scopeid 0x20<link>
- inet6 2409:8a44:3d36:4750:20c:29ff:fe89:50e prefixlen 64 scopeid 0x0<global>
- ether 00:0c:29:89:05:0e txqueuelen 1000 (Ethernet)
- RX packets 1374 bytes 110608 (108.0 KiB)
- RX errors 0 dropped 515 overruns 0 frame 0
- TX packets 588 bytes 89928 (87.8 KiB)
- TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
- ens38: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
- inet 10.1.1.12 netmask 255.255.255.0 broadcast 10.1.1.255
- ether 00:0c:29:89:05:22 txqueuelen 1000 (Ethernet)
- RX packets 0 bytes 0 (0.0 B)
- RX errors 0 dropped 0 overruns 0 frame 0
- TX packets 0 bytes 0 (0.0 B)
- TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
- lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
- inet 127.0.0.1 netmask 255.0.0.0
- inet6 ::1 prefixlen 128 scopeid 0x10<host>
- loop txqueuelen 1 (Local Loopback)
- RX packets 116 bytes 10740 (10.4 KiB)
- RX errors 0 dropped 0 overruns 0 frame 0
- TX packets 116 bytes 10740 (10.4 KiB)
- TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
复制代码 添加成功。
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