我有两个网卡，配置如下：
eth0 Link encap:Ethernet HWaddr 00:19:d1:31:08:e8
inet addr:192.168.5.104 Bcast:192.168.5.255 Mask:255.255.255.0
inet6 addr: fe80::219:d1ff:fe31:8e8/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4564126 errors:590 dropped:0 overruns:0 frame:329
TX packets:9707383 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:1151788275 (1.0 GiB) TX bytes:189318786 (180.5 MiB)
Interrupt:20 Memory:e0300000-e0320000
eth1 Link encap:Ethernet HWaddr 00:e0:4c:51:0d:55
inet addr:85.255.103.4 Bcast:85.255.103.255 Mask:255.255.255.0
inet6 addr: fe80::2e0:4cff:fe51:d55/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:5466 errors:0 dropped:0 overruns:0 frame:0
TX packets:499 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:518961 (506.7 …