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非常奇怪的网络默认路由行为

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非常奇怪的网络默认路由行为

我正在运行服务器 16.04，最近进行了 dist-upgrade，重启后我无法获得网络连接。

当我 ping 任何域时：

$ ping google.com
ping: unknown host google.com

$  ping 8.8.8.8
connect: Network is unreachable

$ ping 10.1.1.1
PING 10.1.1.1 (10.1.1.1) 56(84) bytes of data.
64 bytes from 10.1.1.1: icmp_seq=1 ttl=64 time=0.996 ms

nslookup 问题

 nslookup google.com
;; connection timed out; no servers could be reached

但如果我指定默认路由：

$ nslookup 
> server 10.1.1.1
Default server: 10.1.1.1
Address: 10.1.1.1#53
> google.com
Server:         10.1.1.1
Address:        10.1.1.1#53

Non-authoritative answer:
Name:   google.com
Address: 172.217.8.174
Name:   google.com
Address: 172.217.8.174
Name:   google.com
Address: 172.217.8.174

我有 4 个接口

eth0      Link encap:Ethernet  HWaddr 52:54:00:5f:9b:74  
          inet addr:10.1.1.250  Bcast:10.1.1.255  Mask:255.255.255.0
          inet6 addr: fe80::5054:ff:fe5f:9b74/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:397 errors:0 dropped:0 overruns:0 frame:0
          TX packets:15 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:19855 (19.8 KB)  TX bytes:1542 (1.5 KB)

eth1      Link encap:Ethernet  HWaddr 52:54:00:93:61:40  
          inet addr:10.1.2.250  Bcast:10.1.2.255  Mask:255.255.255.0
          inet6 addr: fe80::5054:ff:fe93:6140/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:675 errors:0 dropped:0 overruns:0 frame:0
          TX packets:625 errors:0 dropped:0 overruns:0 carrier:0
          collisions:930 txqueuelen:1000 
          RX bytes:45296 (45.2 KB)  TX bytes:50167 (50.1 KB)

eth2      Link encap:Ethernet  HWaddr 52:54:00:ff:75:4c  
          inet addr:10.1.3.250  Bcast:10.1.3.255  Mask:255.255.255.0
          inet6 addr: fe80::5054:ff:feff:754c/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:480 (480.0 B)  TX bytes:648 (648.0 B)

eth3      Link encap:Ethernet  HWaddr 52:54:00:e8:45:8f  
          inet addr:10.1.4.250  Bcast:10.1.4.255  Mask:255.255.255.0
          inet6 addr: fe80::5054:ff:fee8:458f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:480 (480.0 B)  TX bytes:648 (648.0 B)

/etc/网络/接口

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet dhcp
        gateway 10.1.1.1

auto eth1
iface eth1 inet static
        address 10.1.2.250
        netmask 255.255.255.0
        gateway 10.1.1.250


auto eth2 
iface eth2 inet static
        address 10.1.3.250
        netmask 255.255.255.0
        gateway 10.1.1.250

auto eth3
iface eth3 inet static
        address 10.1.4.250
        netmask 255.255.255.0
        gateway 10.1.1.250

路由表

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         10.1.1.1        255.255.255.0   UG    0      0        0 eth0
10.1.1.0        *               255.255.255.0   U     0      0        0 eth0
10.1.2.0        *               255.255.255.0   U     0      0        0 eth1
10.1.3.0        *               255.255.255.0   U     0      0        0 eth2
10.1.4.0        *               255.255.255.0   U     0      0        0 eth3

答案1

尝试gateway 10.1.1.250从接口eth1、eth2和 中删除eth3。您不需要它们。默认网关是所有网络的设置。

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