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设置默认网络接口

tag-icon • tag-icon ubuntu networking debian linux-networking
设置默认网络接口

我的/etc/network/interfaces样子是这样的：

auto lo
iface lo inet loopback

auto eth1
iface eth1 inet static
      address 10.0.0.99
      netmask 255.255.255.0
      gateway 10.0.0.1

auto eth0
iface eth0 inet dhcp

重启机器后，我得到了

vagrant@precise64:~$ ip route
default via 10.0.2.2 dev eth0 
default via 10.0.0.1 dev eth1  metric 100 
10.0.0.0/24 dev eth1  proto kernel  scope link  src 10.0.0.99 
10.0.2.0/24 dev eth0  proto kernel  scope link  src 10.0.2.15

我该如何修改/etc/network/interfaces，以便我的流量默认通过 10.0.0.1 而不是 10.0.2.2？我可以按如下方式手动执行此操作，但我不想在每次重启时都这样做：

vagrant@precise64:~$ sudo ip route del default via 10.0.2.2 dev eth0
vagrant@precise64:~$ ip route
default via 10.0.0.1 dev eth1  metric 100 
10.0.0.0/24 dev eth1  proto kernel  scope link  src 10.0.0.99 
10.0.2.0/24 dev eth0  proto kernel  scope link  src 10.0.2.15

答案1

原来原因与此无关/etc/network/interfaces。这台机器是流浪汉VM，默认情况下有一些额外的东西/etc/rc.local：

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

# Make sure eth0 is working. This works around Vagrant issue #391
dhclient eth0

exit 0

注释掉该dhclient eth0行并重新启动会产生以下结果：

vagrant@precise64:~$ ip r
default via 10.0.0.1 dev eth1  metric 100 
10.0.0.0/24 dev eth1  proto kernel  scope link  src 10.0.0.99 
10.0.2.0/24 dev eth0  proto kernel  scope link  src 10.0.2.15

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