Linux connect: Network is unreachable

在虚拟机中ping，发现网络不通：

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1 2	[root@node01 ~]# ping 114.114.114.114 connect: Network is unreachable

发生此问题时，环境如下： 

●网络连接选择的是NAT模式

●虚拟网络配置中NAT模式配置如下：

 ●/etc/sysconfig/network-scripts/ifcfg-ens33文件内容为

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TYPE=Ethernet PROXY_METHOD=none BROWSER_ONLY=no BOOTPROTO=static 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=ens33 DEVICE=ens33 ONBOOT=yes IPADDR=192.168.30.136 NETMASK=255.255.255.0 GETWAY=192.168.30.1 DNS1=114.114.114.114

●ip信息为

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[root@node01 ~]# ifconfig ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500         inet 192.168.30.136  netmask 255.255.255.0  broadcast 192.168.30.255         inet6 fe80::20c:29ff:fe4c:9347  prefixlen 64  scopeid 0x20<link>         inet6 fd15:4ba5:5a2b:1008:20c:29ff:fe4c:9347  prefixlen 64  scopeid 0x0<global>         ether 00:0c:29:4c:93:47  txqueuelen 1000  (Ethernet)         RX packets 628  bytes 61587 (60.1 KiB)         RX errors 0  dropped 0  overruns 0  frame 0         TX packets 505  bytes 75815 (74.0 KiB)         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 1000  (Local Loopback)         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

　　

 参考 “linux关于connect: network is unreachable 问题的解决”（https://blog.csdn.net/xueshao110/article/details/79263498 ）这篇博文，添加默认网关问题得到解决：

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[root@node01 ~]# route add default gw 192.168.30.1 [root@node01 ~]# route Kernel IP routing table Destination     Gateway         Genmask         Flags Metric Ref    Use Iface default         gateway         0.0.0.0         UG    0      0        0 ens33 link-local      0.0.0.0         255.255.0.0     U     1002   0        0 ens33 192.168.30.0    0.0.0.0         255.255.255.0   U     0      0        0 ens33

　　

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[root@node01 ~]# ping 114.114.114.114 PING 114.114.114.114 (114.114.114.114) 56(84) bytes of data. 64 bytes from 114.114.114.114: icmp_seq=1 ttl=128 time=6.97 ms 64 bytes from 114.114.114.114: icmp_seq=2 ttl=128 time=6.72 ms 64 bytes from 114.114.114.114: icmp_seq=3 ttl=128 time=7.60 ms 64 bytes from 114.114.114.114: icmp_seq=4 ttl=128 time=4.84 ms 64 bytes from 114.114.114.114: icmp_seq=5 ttl=128 time=6.32 ms ^C --- 114.114.114.114 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4008ms rtt min/avg/max/mdev = 4.841/6.493/7.603/0.928 ms