虚拟机CentOS 7.4增加双网卡
为了测试v*n搭建环境，需要双网卡环境，搭建过程如下
1、增加虚拟机网络适配器
注意选择：自定义仅限主机模式
2、配置虚拟网络适配器
注意：dhcp上的勾要去掉
3、开机查看网卡信息
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.133.128 netmask 255.255.255.0 broadcast 192.168.133.255
inet6 fe80::dc06:8224:404:8fa6 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:78:21:8b txqueuelen 1000 (Ethernet)
RX packets 4 bytes 618 (618.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 36 bytes 5103 (4.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens37: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 00:0c:29:78:21:95 txqueuelen 1000 (Ethernet)
RX packets 3 bytes 276 (276.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 50 bytes 8652 (8.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
表示已存在两块网卡
4、检查网卡配置
cd /etc/sysconfig/network-scripts
[[email protected] network-scripts]# ll ifcfg-*
-rw-r--r--. 1 root root 280 May 31 00:48 ifcfg-ens33
-rw-r--r--. 1 root root 254 May 3 2017 ifcfg-lo
没有ens37网的配置信息，需要进行配置
5、配置第二块网卡
cp ifcfg-ens33 ifcfg-ens37
vi ifcfg-ens37
最终如下：
TYPE=Ethernet
PROXY_METHOD=none
BROWSER_ONLY=no
#BOOTPROTO=dhcp
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens37
#UUID=809f5580-9085-4d6b-a698-a8e7579b255f
DEVICE=ens37
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.184.10
NETMASK=255.255.255.0
注意：DEVICE、BOOTPROTO（使用静态IP地址）、IPADDR、NETMASK的配置
BOOTPROTO、UUID需要注释掉
6、配置完成后重启reboot
7、查看和检查
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.133.128 netmask 255.255.255.0 broadcast 192.168.133.255
inet6 fe80::dc06:8224:404:8fa6 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:78:21:8b txqueuelen 1000 (Ethernet)
RX packets 1 bytes 342 (342.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 37 bytes 5174 (5.0 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens37: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.184.10 netmask 255.255.255.0 broadcast 192.168.184.255
inet6 fe80::763c:b92d:c6c1:5b66 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:78:21:95 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 37 bytes 4673 (4.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[[email protected] bzpcom]# ping 192.168.184.10
PING 192.168.184.10 (192.168.184.10) 56(84) bytes of data.
64 bytes from 192.168.184.10: icmp_seq=1 ttl=64 time=0.066 ms
64 bytes from 192.168.184.10: icmp_seq=2 ttl=64 time=0.027 ms
64 bytes from 192.168.184.10: icmp_seq=3 ttl=64 time=0.030 ms
配置完成！！