Vmware CentOS虚拟机网络初始设置

问题描述

在使用Vmware虚拟64位CentOS 7的过程中，每次新创建一个虚拟机后（网络设置为NAT模式），会发现网络不可用，使用ping后会出现unknown host错误或者是network is unreachable等等，

[peng@localhost Desktop]$ ping baidu.comping: unknown host baidu.com

解决方案

1. 首先使用ifconfig查看网卡信息，发现第一个网络适配器eno1677736没有获得Ipv4的地址，也就是没有在网络中注册成功：

   eno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500        ether 00:0c:29:91:5c:69  txqueuelen 1000  (Ethernet)        RX packets 171  bytes 10260 (10.0 KiB)        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 0lo: 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 0  (Local Loopback)        RX packets 304  bytes 25880 (25.2 KiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 304  bytes 25880 (25.2 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255        ether 52:54:00:59:c4:0c  txqueuelen 0  (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

2. 进入etc/sysconfig/network-scripts，并找到这个网络适配器的配置文件，使用nano或者vi编辑

   [root@localhost network-scripts]# cd /etc/sysconfig/network-scripts[root@localhost network-scripts]# lsifcfg-eno16777736  ifdown-ppp       ifup-ib      ifup-Teamifcfg-lo           ifdown-routes    ifup-ippp    ifup-TeamPortifdown             ifdown-sit       ifup-ipv6    ifup-tunnelifdown-bnep        ifdown-Team      ifup-isdn    ifup-wirelessifdown-eth         ifdown-TeamPort  ifup-plip    init.ipv6-globalifdown-ib          ifdown-tunnel    ifup-plusb   network-functionsifdown-ippp        ifup             ifup-post    network-functions-ipv6ifdown-ipv6        ifup-aliases     ifup-pppifdown-isdn        ifup-bnep        ifup-routesifdown-post        ifup-eth         ifup-sit[root@localhost network-scripts]# nano ifcfg-eno16777736

3. 将ONBOOT=false 改为ONBOOT=yes：

   TYPE=EthernetBOOTPROTO=dhcpDEFROUTE=yesPEERDNS=yesPEERROUTES=yesIPV4_FAILURE_FATAL=noIPV6INIT=yesIPV6_AUTOCONF=yesIPV6_DEFROUTE=yesIPV6_PEERDNS=yesIPV6_PEERROUTES=yesIPV6_FAILURE_FATAL=noNAME=eno16777736UUID=94a36c28-dc0d-4999-bc65-334d30fff6fcDEVICE=eno16777736ONBOOT=yes

4. 保存退出，最后使用service network restart重启网络

   service network restartRestarting network (via systemctl):                        [  OK  ]

检验

再次使用ifconfig检查网卡情况，发现eno16777736获得了ipv4的地址

[root@localhost network-scripts]# ifconfigeno16777736: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500        inet 192.168.124.134  netmask 255.255.255.0  broadcast 192.168.124.255        inet6 fe80::20c:29ff:fe91:5c69  prefixlen 64  scopeid 0x20<link>        ether 00:0c:29:91:5c:69  txqueuelen 1000  (Ethernet)        RX packets 276800  bytes 372561384 (355.3 MiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 121742  bytes 7389047 (7.0 MiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0lo: 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 0  (Local Loopback)        RX packets 476  bytes 40664 (39.7 KiB)        RX errors 0  dropped 0  overruns 0  frame 0        TX packets 476  bytes 40664 (39.7 KiB)        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255        ether 52:54:00:59:c4:0c  txqueuelen 0  (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

再次使用ping检查网络情况，发现网络正常：

[root@localhost network-scripts]# ping baidu.comPING baidu.com (180.149.132.47) 56(84) bytes of data.64 bytes from 180.149.132.47: icmp_seq=1 ttl=128 time=394 ms64 bytes from 180.149.132.47: icmp_seq=2 ttl=128 time=390 ms^C--- baidu.com ping statistics ---3 packets transmitted, 2 received, 33% packet loss, time 2000msrtt min/avg/max/mdev = 390.585/392.724/394.863/2.139 ms