linux中网关设置网络连接的影响

001、

[root@PC1 network-scripts]# cat ifcfg-ens32 
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="ens32"
UUID="829f59a3-6c84-4f74-8265-0abfd9f63178"
DEVICE="ens32"
ONBOOT="yes"
IPADDR=192.168.71.130
GATEWAY=192.168.71.1                     ## 网关1
NETMASK=255.255.255.0
DNS1=8.8.8.8
DNS2=114.114.114.114

[root@PC1 network-scripts]# systemctl restart network         ## 重启网络服务
[root@PC1 network-scripts]# ping -c 3 www.baidu.com           ## 测试网络连通性
ping: www.baidu.com: Name or service not known

002、修改网关，测试网络

[root@PC1 network-scripts]# cat ifcfg-ens32 
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="ens32"
UUID="829f59a3-6c84-4f74-8265-0abfd9f63178"
DEVICE="ens32"
ONBOOT="yes"
IPADDR=192.168.71.130
GATEWAY=192.168.71.2               ## 调整后的网关2
NETMASK=255.255.255.0
DNS1=8.8.8.8
DNS2=114.114.114.114

[root@PC1 network-scripts]# systemctl restart network                         ## 重启网络服务
[root@PC1 network-scripts]# ping -c 3 www.baidu.com                           ## 测试网络联通性， 可以联通
PING www.a.shifen.com (110.242.68.4) 56(84) bytes of data.
64 bytes from 110.242.68.4 (110.242.68.4): icmp_seq=1 ttl=128 time=12.8 ms
64 bytes from 110.242.68.4 (110.242.68.4): icmp_seq=2 ttl=128 time=11.7 ms
64 bytes from 110.242.68.4 (110.242.68.4): icmp_seq=3 ttl=128 time=11.9 ms

--- www.a.shifen.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2005ms
rtt min/avg/max/mdev = 11.756/12.198/12.875/0.502 ms