ubuntu16.04 eth0 eth5，eth0：內網(靜態IP)，eth5：外網(DHCP分配)
root@localhost:~# ifconfig
eth5 Link encap:Ethernet HWaddr 00:11:22:33:44:51
inet addr:172.21.171.68 Bcast:172.21.171.255 Mask:255.255.254.0
inet6 addr: fe80::4a41:bfd0:68b9:e9c8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:6086 errors:0 dropped:0 overruns:0 frame:0
TX packets:4452 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:5477360 (5.4 MB) TX bytes:639104 (639.1 KB)
eth0 Link encap:Ethernet HWaddr 00:0b:ab:11:22:33
inet addr:169.254.8.120 Bcast:169.254.8.255 Mask:255.255.255.0
inet6 addr: fe80::157b:8a3e:c6e:468c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:262 errors:0 dropped:0 overruns:0 frame:0
TX packets:74 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:21647 (21.6 KB) TX bytes:9379 (9.3 KB)
Interrupt:24
root@localhost:~# route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
default 172.21.171.254 0.0.0.0 UG 100 0 0 eth5
default 169.254.8.254 0.0.0.0 UG 101 0 0 eth0
169.254.8.0 * 255.255.255.0 U 100 0 0 eth0
adhcp2.acn.a 172.21.171.254 255.255.255.255 UGH 100 0 0 eth5
172.21.170.0 * 255.255.254.0 U 100 0 0 eth5
修改如下：
root@localhost:~# cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:
source-directory /etc/network/interfaces.d
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
address 169.254.8.120
netmask 255.255.255.0
gateway 169.254.8.254
#DNS=10.0.0.1 8.8.8.8 114.114.114.114
root@localhost:~# cat /etc/NetworkManager/NetworkManager.conf
[main]
plugins=ifupdown,keyfile,ofono
dns=dnsmasq
[ifupdown]
managed=true